1/*
  2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
  3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
  4 *
  5 * This software is available to you under a choice of one of two
  6 * licenses.  You may choose to be licensed under the terms of the GNU
  7 * General Public License (GPL) Version 2, available from the file
  8 * COPYING in the main directory of this source tree, or the
  9 * OpenIB.org BSD license below:
 10 *
 11 *     Redistribution and use in source and binary forms, with or
 12 *     without modification, are permitted provided that the following
 13 *     conditions are met:
 14 *
 15 *      - Redistributions of source code must retain the above
 16 *        copyright notice, this list of conditions and the following
 17 *        disclaimer.
 18 *
 19 *      - Redistributions in binary form must reproduce the above
 20 *        copyright notice, this list of conditions and the following
 21 *        disclaimer in the documentation and/or other materials
 22 *        provided with the distribution.
 23 *
 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 31 * SOFTWARE.
 32 */
 33
 34#include <linux/workqueue.h>
 35
 36#include "mlx4.h"
 37
 38enum {
 39	MLX4_CATAS_POLL_INTERVAL	= 5 * HZ,
 40};
 41
 42static DEFINE_SPINLOCK(catas_lock);
 43
 44static LIST_HEAD(catas_list);
 45static struct work_struct catas_work;
 46
 47static int internal_err_reset = 1;
 48module_param(internal_err_reset, int, 0644);
 49MODULE_PARM_DESC(internal_err_reset,
 50		 "Reset device on internal errors if non-zero (default 1)");
 51
 52static void dump_err_buf(struct mlx4_dev *dev)
 53{
 54	struct mlx4_priv *priv = mlx4_priv(dev);
 55
 56	int i;
 57
 58	mlx4_err(dev, "Internal error detected:\n");
 59	for (i = 0; i < priv->fw.catas_size; ++i)
 60		mlx4_err(dev, "  buf[%02x]: %08x\n",
 61			 i, swab32(readl(priv->catas_err.map + i)));
 62}
 63
 64static void poll_catas(unsigned long dev_ptr)
 65{
 66	struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
 67	struct mlx4_priv *priv = mlx4_priv(dev);
 68
 69	if (readl(priv->catas_err.map)) {
 70		dump_err_buf(dev);
 71
 72		mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
 73
 74		if (internal_err_reset) {
 75			spin_lock(&catas_lock);
 76			list_add(&priv->catas_err.list, &catas_list);
 77			spin_unlock(&catas_lock);
 78
 79			queue_work(mlx4_wq, &catas_work);
 80		}
 81	} else
 82		mod_timer(&priv->catas_err.timer,
 83			  round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
 84}
 85
 86static void catas_reset(struct work_struct *work)
 87{
 88	struct mlx4_priv *priv, *tmppriv;
 89	struct mlx4_dev *dev;
 90
 91	LIST_HEAD(tlist);
 92	int ret;
 93
 94	spin_lock_irq(&catas_lock);
 95	list_splice_init(&catas_list, &tlist);
 96	spin_unlock_irq(&catas_lock);
 97
 98	list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
 99		struct pci_dev *pdev = priv->dev.pdev;
100
101		ret = mlx4_restart_one(priv->dev.pdev);
102		/* 'priv' now is not valid */
103		if (ret)
104			pr_err("mlx4 %s: Reset failed (%d)\n",
105			       pci_name(pdev), ret);
106		else {
107			dev  = pci_get_drvdata(pdev);
108			mlx4_dbg(dev, "Reset succeeded\n");
109		}
110	}
111}
112
113void mlx4_start_catas_poll(struct mlx4_dev *dev)
114{
115	struct mlx4_priv *priv = mlx4_priv(dev);
116	phys_addr_t addr;
117
118	INIT_LIST_HEAD(&priv->catas_err.list);
119	init_timer(&priv->catas_err.timer);
120	priv->catas_err.map = NULL;
121
122	addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
123		priv->fw.catas_offset;
124
125	priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
126	if (!priv->catas_err.map) {
127		mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
128			  (unsigned long long) addr);
129		return;
130	}
131
132	priv->catas_err.timer.data     = (unsigned long) dev;
133	priv->catas_err.timer.function = poll_catas;
134	priv->catas_err.timer.expires  =
135		round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
136	add_timer(&priv->catas_err.timer);
137}
138
139void mlx4_stop_catas_poll(struct mlx4_dev *dev)
140{
141	struct mlx4_priv *priv = mlx4_priv(dev);
142
143	del_timer_sync(&priv->catas_err.timer);
144
145	if (priv->catas_err.map)
146		iounmap(priv->catas_err.map);
147
148	spin_lock_irq(&catas_lock);
149	list_del(&priv->catas_err.list);
150	spin_unlock_irq(&catas_lock);
151}
152
153void  __init mlx4_catas_init(void)
154{
155	INIT_WORK(&catas_work, catas_reset);
156}