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Message-Id: <1324312434-13151-2-git-send-email-alex.bluesman.smirnov@gmail.com>
Date: Mon, 19 Dec 2011 19:33:42 +0300
From: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
To: davem@...emloft.net
Cc: dbaryshkov@...il.com, linux-zigbee-devel@...ts.sourceforge.net,
netdev@...r.kernel.org,
Alexander Smirnov <alex.bluesman.smirnov@...il.com>
Subject: [PATCH 02/14] mac802154: allocation of ieee802154 device
Interface for device drivers to allocate and register ieee802154
compatible devices.
Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
---
net/Kconfig | 1 +
net/Makefile | 1 +
net/mac802154/Kconfig | 16 +++++
net/mac802154/Makefile | 2 +
net/mac802154/ieee802154_dev.c | 124 ++++++++++++++++++++++++++++++++++++++++
net/mac802154/mac802154.h | 61 ++++++++++++++++++++
6 files changed, 205 insertions(+), 0 deletions(-)
create mode 100644 net/mac802154/Kconfig
create mode 100644 net/mac802154/Makefile
create mode 100644 net/mac802154/ieee802154_dev.c
create mode 100644 net/mac802154/mac802154.h
diff --git a/net/Kconfig b/net/Kconfig
index 2d99873..b8d4590 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -211,6 +211,7 @@ source "net/econet/Kconfig"
source "net/wanrouter/Kconfig"
source "net/phonet/Kconfig"
source "net/ieee802154/Kconfig"
+source "net/mac802154/Kconfig"
source "net/sched/Kconfig"
source "net/dcb/Kconfig"
source "net/dns_resolver/Kconfig"
diff --git a/net/Makefile b/net/Makefile
index acdde49..1969e93 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -60,6 +60,7 @@ ifneq ($(CONFIG_DCB),)
obj-y += dcb/
endif
obj-$(CONFIG_IEEE802154) += ieee802154/
+obj-$(CONFIG_MAC802154) += mac802154/
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_SYSCTL) += sysctl_net.o
diff --git a/net/mac802154/Kconfig b/net/mac802154/Kconfig
new file mode 100644
index 0000000..a967dda
--- /dev/null
+++ b/net/mac802154/Kconfig
@@ -0,0 +1,16 @@
+config MAC802154
+ tristate "Generic IEEE 802.15.4 Soft Networking Stack (mac802154)"
+ depends on IEEE802154 && EXPERIMENTAL
+ select CRC_CCITT
+ ---help---
+ This option enables the hardware independent IEEE 802.15.4
+ networking stack for SoftMAC devices (the ones implementing
+ only PHY level of IEEE 802.15.4 standard).
+
+ Note: this implementation is neither certified, nor feature
+ complete! Compatibility with other implementations hasn't
+ been tested yet!
+
+ If you plan to use HardMAC IEEE 802.15.4 devices, you can
+ say N here. Alternatievly you can say M to compile it as
+ module.
diff --git a/net/mac802154/Makefile b/net/mac802154/Makefile
new file mode 100644
index 0000000..cda9393
--- /dev/null
+++ b/net/mac802154/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_MAC802154) += mac802154.o
+mac802154-objs := ieee802154_dev.o
diff --git a/net/mac802154/ieee802154_dev.c b/net/mac802154/ieee802154_dev.c
new file mode 100644
index 0000000..2bd1034
--- /dev/null
+++ b/net/mac802154/ieee802154_dev.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2007-2011 Siemens AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <net/route.h>
+
+#include <net/mac802154.h>
+#include <net/wpan-phy.h>
+
+#include "mac802154.h"
+
+struct ieee802154_dev *ieee802154_alloc_device(size_t priv_size,
+ struct ieee802154_ops *ops)
+{
+ struct wpan_phy *phy;
+ struct mac802154_priv *priv;
+
+ if (!ops || !ops->xmit || !ops->ed || !ops->start ||
+ !ops->stop || !ops->set_channel) {
+ printk(KERN_ERR
+ "undefined IEEE802.15.4 device operations\n");
+ return NULL;
+ }
+
+ phy = wpan_phy_alloc(ALIGN(sizeof(*priv), NETDEV_ALIGN) + priv_size);
+ if (!phy) {
+ printk(KERN_ERR
+ "failure to allocate master IEEE802.15.4 device\n");
+ return NULL;
+ }
+
+ priv = wpan_phy_priv(phy);
+ priv->hw.phy = priv->phy = phy;
+ priv->hw.priv = (char *)priv + ALIGN(sizeof(*priv), NETDEV_ALIGN);
+ priv->ops = ops;
+
+ INIT_LIST_HEAD(&priv->slaves);
+ mutex_init(&priv->slaves_mtx);
+
+ return &priv->hw;
+}
+EXPORT_SYMBOL(ieee802154_alloc_device);
+
+void ieee802154_free_device(struct ieee802154_dev *hw)
+{
+ struct mac802154_priv *priv = mac802154_to_priv(hw);
+
+ wpan_phy_free(priv->phy);
+
+ mutex_destroy(&priv->slaves_mtx);
+}
+EXPORT_SYMBOL(ieee802154_free_device);
+
+
+int ieee802154_register_device(struct ieee802154_dev *dev)
+{
+ struct mac802154_priv *priv = mac802154_to_priv(dev);
+ int rc = -ENOMEM;
+
+ priv->dev_workqueue =
+ create_singlethread_workqueue(wpan_phy_name(priv->phy));
+ if (!priv->dev_workqueue)
+ goto out;
+
+ wpan_phy_set_dev(priv->phy, priv->hw.parent);
+
+ rc = wpan_phy_register(priv->phy);
+ if (rc < 0)
+ goto out_wq;
+
+ rtnl_lock();
+
+ mutex_lock(&priv->slaves_mtx);
+ priv->running = MAC802154_DEVICE_RUN;
+ mutex_unlock(&priv->slaves_mtx);
+
+ rtnl_unlock();
+
+ return 0;
+
+out_wq:
+ destroy_workqueue(priv->dev_workqueue);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(ieee802154_register_device);
+
+void ieee802154_unregister_device(struct ieee802154_dev *dev)
+{
+ struct mac802154_priv *priv = mac802154_to_priv(dev);
+
+ flush_workqueue(priv->dev_workqueue);
+ destroy_workqueue(priv->dev_workqueue);
+
+ rtnl_lock();
+
+ mutex_lock(&priv->slaves_mtx);
+ priv->running = MAC802154_DEVICE_STOPPED;
+ mutex_unlock(&priv->slaves_mtx);
+
+ rtnl_unlock();
+
+ wpan_phy_unregister(priv->phy);
+}
+EXPORT_SYMBOL(ieee802154_unregister_device);
+
+MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
+MODULE_LICENSE("GPL v2");
diff --git a/net/mac802154/mac802154.h b/net/mac802154/mac802154.h
new file mode 100644
index 0000000..16f96f1
--- /dev/null
+++ b/net/mac802154/mac802154.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2007-2011 Siemens AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Written by:
+ * Pavel Smolenskiy <pavel.smolenskiy@...il.com>
+ * Maxim Gorbachyov <maxim.gorbachev@...mens.com>
+ * Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
+ * Alexander Smirnov <alex.bluesman.smirnov@...il.com>
+ */
+#ifndef MAC802154_H
+#define MAC802154_H
+
+struct mac802154_priv {
+ struct ieee802154_dev hw;
+ struct ieee802154_ops *ops;
+
+ struct wpan_phy *phy;
+
+ int open_count;
+ /* As in mac80211 slaves list is modified:
+ * 1) under the RTNL
+ * 2) protected by slaves_mtx;
+ * 3) in an RCU manner
+ *
+ * So atomic readers can use any of this protection methods
+ */
+ struct list_head slaves;
+ struct mutex slaves_mtx;
+ /* This one is used for scanning and other
+ * jobs not to be interfered with serial driver */
+ struct workqueue_struct *dev_workqueue;
+
+ /*
+ * These flags are also modified under slaves_mtx and RTNL,
+ * so you can read them using any of protection methods.
+ */
+ /* SoftMAC device is registered and running. One can add subinterfaces. */
+ unsigned running: 1;
+};
+
+enum {
+ MAC802154_DEVICE_STOPPED,
+ MAC802154_DEVICE_RUN,
+};
+
+#define mac802154_to_priv(_hw) container_of(_hw, struct mac802154_priv, hw)
+
+#endif /* MAC802154_H */
--
1.7.2.3
--
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