1 files changed, 165 insertions, 0 deletions

diff --git a/drivers/net/mlx4/intf.c b/drivers/net/mlx4/intf.c
new file mode 100644
index 000000000000..65854f9e9c76
--- /dev/null
+++ b/drivers/net/mlx4/intf.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2006, 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/mlx4/driver.h>
+
+#include "mlx4.h"
+
+struct mlx4_device_context {
+        struct list_head        list;
+        struct mlx4_interface  *intf;
+        void                   *context;
+};
+
+static LIST_HEAD(intf_list);
+static LIST_HEAD(dev_list);
+static DEFINE_MUTEX(intf_mutex);
+
+static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
+{
+        struct mlx4_device_context *dev_ctx;
+
+        dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);
+        if (!dev_ctx)
+                return;
+
+        dev_ctx->intf    = intf;
+        dev_ctx->context = intf->add(&priv->dev);
+
+        if (dev_ctx->context) {
+                spin_lock_irq(&priv->ctx_lock);
+                list_add_tail(&dev_ctx->list, &priv->ctx_list);
+                spin_unlock_irq(&priv->ctx_lock);
+        } else
+                kfree(dev_ctx);
+}
+
+static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)
+{
+        struct mlx4_device_context *dev_ctx;
+
+        list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+                if (dev_ctx->intf == intf) {
+                        spin_lock_irq(&priv->ctx_lock);
+                        list_del(&dev_ctx->list);
+                        spin_unlock_irq(&priv->ctx_lock);
+
+                        intf->remove(&priv->dev, dev_ctx->context);
+                        kfree(dev_ctx);
+                        return;
+                }
+}
+
+int mlx4_register_interface(struct mlx4_interface *intf)
+{
+        struct mlx4_priv *priv;
+
+        if (!intf->add || !intf->remove)
+                return -EINVAL;
+
+        mutex_lock(&intf_mutex);
+
+        list_add_tail(&intf->list, &intf_list);
+        list_for_each_entry(priv, &dev_list, dev_list)
+                mlx4_add_device(intf, priv);
+
+        mutex_unlock(&intf_mutex);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(mlx4_register_interface);
+
+void mlx4_unregister_interface(struct mlx4_interface *intf)
+{
+        struct mlx4_priv *priv;
+
+        mutex_lock(&intf_mutex);
+
+        list_for_each_entry(priv, &dev_list, dev_list)
+                mlx4_remove_device(intf, priv);
+
+        list_del(&intf->list);
+
+        mutex_unlock(&intf_mutex);
+}
+EXPORT_SYMBOL_GPL(mlx4_unregister_interface);
+
+void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type,
+                         int subtype, int port)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_device_context *dev_ctx;
+        unsigned long flags;
+
+        spin_lock_irqsave(&priv->ctx_lock, flags);
+
+        list_for_each_entry(dev_ctx, &priv->ctx_list, list)
+                if (dev_ctx->intf->event)
+                        dev_ctx->intf->event(dev, dev_ctx->context, type,
+                                             subtype, port);
+
+        spin_unlock_irqrestore(&priv->ctx_lock, flags);
+}
+
+int mlx4_register_device(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_interface *intf;
+
+        INIT_LIST_HEAD(&priv->ctx_list);
+        spin_lock_init(&priv->ctx_lock);
+
+        mutex_lock(&intf_mutex);
+
+        list_add_tail(&priv->dev_list, &dev_list);
+        list_for_each_entry(intf, &intf_list, list)
+                mlx4_add_device(intf, priv);
+
+        mutex_unlock(&intf_mutex);
+
+        return 0;
+}
+
+void mlx4_unregister_device(struct mlx4_dev *dev)
+{
+        struct mlx4_priv *priv = mlx4_priv(dev);
+        struct mlx4_interface *intf;
+
+        mutex_lock(&intf_mutex);
+
+        list_for_each_entry(intf, &intf_list, list)
+                mlx4_remove_device(intf, priv);
+
+        list_del(&priv->dev_list);
+
+        mutex_unlock(&intf_mutex);
+}