Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

1 files changed, 99 insertions, 7 deletions

diff --git a/drivers/net/mlx4/catas.c b/drivers/net/mlx4/catas.c
index 1bb088aeaf71..6b32ec94b3a8 100644
--- a/drivers/net/mlx4/catas.c
+++ b/drivers/net/mlx4/catas.c
@@ -30,41 +30,133 @@
  * SOFTWARE.
  */
 
+#include <linux/workqueue.h>
+
 #include "mlx4.h"
 
-void mlx4_handle_catas_err(struct mlx4_dev *dev)
+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, "Catastrophic error detected:\n");
+	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)));
+}
 
-	mlx4_dispatch_event(dev, MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR, 0, 0);
+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));
 }
 
-void mlx4_map_catas_buf(struct mlx4_dev *dev)
+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 catastrophic error buffer at 0x%lx\n",
+	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_unmap_catas_buf(struct mlx4_dev *dev)
+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);
 }