Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 211 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/iwlwifi/mvm/binding.c b/kernel/drivers/net/wireless/iwlwifi/mvm/binding.c
new file mode 100644
index 000000000..a1376539d
--- /dev/null
+++ b/kernel/drivers/net/wireless/iwlwifi/mvm/binding.c
@@ -0,0 +1,211 @@
+/******************************************************************************
+ *
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License 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,
+ * USA
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called COPYING.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * 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.
+ *  * Neither the name Intel Corporation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+#include <net/mac80211.h>
+#include "fw-api.h"
+#include "mvm.h"
+
+struct iwl_mvm_iface_iterator_data {
+	struct ieee80211_vif *ignore_vif;
+	int idx;
+
+	struct iwl_mvm_phy_ctxt *phyctxt;
+
+	u16 ids[MAX_MACS_IN_BINDING];
+	u16 colors[MAX_MACS_IN_BINDING];
+};
+
+static int iwl_mvm_binding_cmd(struct iwl_mvm *mvm, u32 action,
+			       struct iwl_mvm_iface_iterator_data *data)
+{
+	struct iwl_binding_cmd cmd;
+	struct iwl_mvm_phy_ctxt *phyctxt = data->phyctxt;
+	int i, ret;
+	u32 status;
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	cmd.id_and_color = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
+							   phyctxt->color));
+	cmd.action = cpu_to_le32(action);
+	cmd.phy = cpu_to_le32(FW_CMD_ID_AND_COLOR(phyctxt->id,
+						  phyctxt->color));
+
+	for (i = 0; i < MAX_MACS_IN_BINDING; i++)
+		cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
+	for (i = 0; i < data->idx; i++)
+		cmd.macs[i] = cpu_to_le32(FW_CMD_ID_AND_COLOR(data->ids[i],
+							      data->colors[i]));
+
+	status = 0;
+	ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
+					  sizeof(cmd), &cmd, &status);
+	if (ret) {
+		IWL_ERR(mvm, "Failed to send binding (action:%d): %d\n",
+			action, ret);
+		return ret;
+	}
+
+	if (status) {
+		IWL_ERR(mvm, "Binding command failed: %u\n", status);
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+static void iwl_mvm_iface_iterator(void *_data, u8 *mac,
+				   struct ieee80211_vif *vif)
+{
+	struct iwl_mvm_iface_iterator_data *data = _data;
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+	if (vif == data->ignore_vif)
+		return;
+
+	if (mvmvif->phy_ctxt != data->phyctxt)
+		return;
+
+	if (WARN_ON_ONCE(data->idx >= MAX_MACS_IN_BINDING))
+		return;
+
+	data->ids[data->idx] = mvmvif->id;
+	data->colors[data->idx] = mvmvif->color;
+	data->idx++;
+}
+
+static int iwl_mvm_binding_update(struct iwl_mvm *mvm,
+				  struct ieee80211_vif *vif,
+				  struct iwl_mvm_phy_ctxt *phyctxt,
+				  bool add)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_mvm_iface_iterator_data data = {
+		.ignore_vif = vif,
+		.phyctxt = phyctxt,
+	};
+	u32 action = FW_CTXT_ACTION_MODIFY;
+
+	lockdep_assert_held(&mvm->mutex);
+
+	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
+						   IEEE80211_IFACE_ITER_NORMAL,
+						   iwl_mvm_iface_iterator,
+						   &data);
+
+	/*
+	 * If there are no other interfaces yet we
+	 * need to create a new binding.
+	 */
+	if (data.idx == 0) {
+		if (add)
+			action = FW_CTXT_ACTION_ADD;
+		else
+			action = FW_CTXT_ACTION_REMOVE;
+	}
+
+	if (add) {
+		if (WARN_ON_ONCE(data.idx >= MAX_MACS_IN_BINDING))
+			return -EINVAL;
+
+		data.ids[data.idx] = mvmvif->id;
+		data.colors[data.idx] = mvmvif->color;
+		data.idx++;
+	}
+
+	return iwl_mvm_binding_cmd(mvm, action, &data);
+}
+
+int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
+		return -EINVAL;
+
+	/*
+	 * Update SF - Disable if needed. if this fails, SF might still be on
+	 * while many macs are bound, which is forbidden - so fail the binding.
+	 */
+	if (iwl_mvm_sf_update(mvm, vif, false))
+		return -EINVAL;
+
+	return iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, true);
+}
+
+int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	int ret;
+
+	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
+		return -EINVAL;
+
+	ret = iwl_mvm_binding_update(mvm, vif, mvmvif->phy_ctxt, false);
+
+	if (!ret)
+		if (iwl_mvm_sf_update(mvm, vif, true))
+			IWL_ERR(mvm, "Failed to update SF state\n");
+
+	return ret;
+}