Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.26

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.26: (1090 commits)
  [NET]: Fix and allocate less memory for ->priv'less netdevices
  [IPV6]: Fix dangling references on error in fib6_add().
  [NETLABEL]: Fix NULL deref in netlbl_unlabel_staticlist_gen() if ifindex not found
  [PKT_SCHED]: Fix datalen check in tcf_simp_init().
  [INET]: Uninline the __inet_inherit_port call.
  [INET]: Drop the inet_inherit_port() call.
  SCTP: Initialize partial_bytes_acked to 0, when all of the data is acked.
  [netdrvr] forcedeth: internal simplifications; changelog removal
  phylib: factor out get_phy_id from within get_phy_device
  PHY: add BCM5464 support to broadcom PHY driver
  cxgb3: Fix __must_check warning with dev_dbg.
  tc35815: Statistics cleanup
  natsemi: fix MMIO for PPC 44x platforms
  [TIPC]: Cleanup of TIPC reference table code
  [TIPC]: Optimized initialization of TIPC reference table
  [TIPC]: Remove inlining of reference table locking routines
  e1000: convert uint16_t style integers to u16
  ixgb: convert uint16_t style integers to u16
  sb1000.c: make const arrays static
  sb1000.c: stop inlining largish static functions
  ...

1 files changed, 249 insertions, 0 deletions

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
new file mode 100644
index 000000000000..841df93807fc
--- /dev/null
+++ b/net/mac80211/rate.c
@@ -0,0 +1,249 @@
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/rtnetlink.h>
+#include "rate.h"
+#include "ieee80211_i.h"
+
+struct rate_control_alg {
+	struct list_head list;
+	struct rate_control_ops *ops;
+};
+
+static LIST_HEAD(rate_ctrl_algs);
+static DEFINE_MUTEX(rate_ctrl_mutex);
+
+static char *ieee80211_default_rc_algo = CONFIG_MAC80211_RC_DEFAULT;
+module_param(ieee80211_default_rc_algo, charp, 0644);
+MODULE_PARM_DESC(ieee80211_default_rc_algo,
+		 "Default rate control algorithm for mac80211 to use");
+
+int ieee80211_rate_control_register(struct rate_control_ops *ops)
+{
+	struct rate_control_alg *alg;
+
+	if (!ops->name)
+		return -EINVAL;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (!strcmp(alg->ops->name, ops->name)) {
+			/* don't register an algorithm twice */
+			WARN_ON(1);
+			mutex_unlock(&rate_ctrl_mutex);
+			return -EALREADY;
+		}
+	}
+
+	alg = kzalloc(sizeof(*alg), GFP_KERNEL);
+	if (alg == NULL) {
+		mutex_unlock(&rate_ctrl_mutex);
+		return -ENOMEM;
+	}
+	alg->ops = ops;
+
+	list_add_tail(&alg->list, &rate_ctrl_algs);
+	mutex_unlock(&rate_ctrl_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL(ieee80211_rate_control_register);
+
+void ieee80211_rate_control_unregister(struct rate_control_ops *ops)
+{
+	struct rate_control_alg *alg;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (alg->ops == ops) {
+			list_del(&alg->list);
+			kfree(alg);
+			break;
+		}
+	}
+	mutex_unlock(&rate_ctrl_mutex);
+}
+EXPORT_SYMBOL(ieee80211_rate_control_unregister);
+
+static struct rate_control_ops *
+ieee80211_try_rate_control_ops_get(const char *name)
+{
+	struct rate_control_alg *alg;
+	struct rate_control_ops *ops = NULL;
+
+	if (!name)
+		return NULL;
+
+	mutex_lock(&rate_ctrl_mutex);
+	list_for_each_entry(alg, &rate_ctrl_algs, list) {
+		if (!strcmp(alg->ops->name, name))
+			if (try_module_get(alg->ops->module)) {
+				ops = alg->ops;
+				break;
+			}
+	}
+	mutex_unlock(&rate_ctrl_mutex);
+	return ops;
+}
+
+/* Get the rate control algorithm. */
+static struct rate_control_ops *
+ieee80211_rate_control_ops_get(const char *name)
+{
+	struct rate_control_ops *ops;
+	const char *alg_name;
+
+	if (!name)
+		alg_name = ieee80211_default_rc_algo;
+	else
+		alg_name = name;
+
+	ops = ieee80211_try_rate_control_ops_get(alg_name);
+	if (!ops) {
+		request_module("rc80211_%s", alg_name);
+		ops = ieee80211_try_rate_control_ops_get(alg_name);
+	}
+	if (!ops && name)
+		/* try default if specific alg requested but not found */
+		ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
+
+	/* try built-in one if specific alg requested but not found */
+	if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
+		ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
+
+	return ops;
+}
+
+static void ieee80211_rate_control_ops_put(struct rate_control_ops *ops)
+{
+	module_put(ops->module);
+}
+
+struct rate_control_ref *rate_control_alloc(const char *name,
+					    struct ieee80211_local *local)
+{
+	struct rate_control_ref *ref;
+
+	ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
+	if (!ref)
+		goto fail_ref;
+	kref_init(&ref->kref);
+	ref->ops = ieee80211_rate_control_ops_get(name);
+	if (!ref->ops)
+		goto fail_ops;
+	ref->priv = ref->ops->alloc(local);
+	if (!ref->priv)
+		goto fail_priv;
+	return ref;
+
+fail_priv:
+	ieee80211_rate_control_ops_put(ref->ops);
+fail_ops:
+	kfree(ref);
+fail_ref:
+	return NULL;
+}
+
+static void rate_control_release(struct kref *kref)
+{
+	struct rate_control_ref *ctrl_ref;
+
+	ctrl_ref = container_of(kref, struct rate_control_ref, kref);
+	ctrl_ref->ops->free(ctrl_ref->priv);
+	ieee80211_rate_control_ops_put(ctrl_ref->ops);
+	kfree(ctrl_ref);
+}
+
+void rate_control_get_rate(struct net_device *dev,
+			   struct ieee80211_supported_band *sband,
+			   struct sk_buff *skb,
+			   struct rate_selection *sel)
+{
+	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
+	struct rate_control_ref *ref = local->rate_ctrl;
+	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
+	struct sta_info *sta;
+	int i;
+
+	rcu_read_lock();
+	sta = sta_info_get(local, hdr->addr1);
+
+	memset(sel, 0, sizeof(struct rate_selection));
+
+	ref->ops->get_rate(ref->priv, dev, sband, skb, sel);
+
+	/* Select a non-ERP backup rate. */
+	if (!sel->nonerp) {
+		for (i = 0; i < sband->n_bitrates; i++) {
+			struct ieee80211_rate *rate = &sband->bitrates[i];
+			if (sel->rate->bitrate < rate->bitrate)
+				break;
+
+			if (rate_supported(sta, sband->band, i) &&
+			    !(rate->flags & IEEE80211_RATE_ERP_G))
+				sel->nonerp = rate;
+		}
+	}
+
+	rcu_read_unlock();
+}
+
+struct rate_control_ref *rate_control_get(struct rate_control_ref *ref)
+{
+	kref_get(&ref->kref);
+	return ref;
+}
+
+void rate_control_put(struct rate_control_ref *ref)
+{
+	kref_put(&ref->kref, rate_control_release);
+}
+
+int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
+				 const char *name)
+{
+	struct rate_control_ref *ref, *old;
+
+	ASSERT_RTNL();
+	if (local->open_count || netif_running(local->mdev))
+		return -EBUSY;
+
+	ref = rate_control_alloc(name, local);
+	if (!ref) {
+		printk(KERN_WARNING "%s: Failed to select rate control "
+		       "algorithm\n", wiphy_name(local->hw.wiphy));
+		return -ENOENT;
+	}
+
+	old = local->rate_ctrl;
+	local->rate_ctrl = ref;
+	if (old) {
+		rate_control_put(old);
+		sta_info_flush(local, NULL);
+	}
+
+	printk(KERN_DEBUG "%s: Selected rate control "
+	       "algorithm '%s'\n", wiphy_name(local->hw.wiphy),
+	       ref->ops->name);
+
+
+	return 0;
+}
+
+void rate_control_deinitialize(struct ieee80211_local *local)
+{
+	struct rate_control_ref *ref;
+
+	ref = local->rate_ctrl;
+	local->rate_ctrl = NULL;
+	rate_control_put(ref);
+}
+