drivers/net/wireless/intel/iwlwifi/mvm/offloading.c - vendor/opensource/backports - Git at Google

 /******************************************************************************
  *
  * 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.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  * Copyright(c) 2015 Intel Deutschland GmbH
  *
  * 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 <linuxwifi@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.
  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  * Copyright(c) 2015 Intel Deutschland GmbH
  * 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/ipv6.h>
 #include <net/addrconf.h>
 #include <linux/bitops.h>
 #include "mvm.h"

 void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
 				struct iwl_wowlan_config_cmd *cmd)
 {
 	int i;

 	/*
 	 * For QoS counters, we store the one to use next, so subtract 0x10
 	 * since the uCode will add 0x10 *before* using the value while we
 	 * increment after using the value (i.e. store the next value to use).
 	 */
 	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 		u16 seq = mvm_ap_sta->tid_data[i].seq_number;
 		seq -= 0x10;
 		cmd->qos_seq[i] = cpu_to_le16(seq);
 	}
 }

 int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 			       struct ieee80211_vif *vif,
 			       bool disable_offloading,
 			       bool offload_ns,
 			       u32 cmd_flags)
 {
 	union {
 		struct iwl_proto_offload_cmd_v1 v1;
 		struct iwl_proto_offload_cmd_v2 v2;
 		struct iwl_proto_offload_cmd_v3_small v3s;
 		struct iwl_proto_offload_cmd_v3_large v3l;
 	} cmd = {};
 	struct iwl_host_cmd hcmd = {
 		.id = PROT_OFFLOAD_CONFIG_CMD,
 		.flags = cmd_flags,
 		.data[0] = &cmd,
 		.dataflags[0] = IWL_HCMD_DFL_DUP,
 	};
 	struct iwl_proto_offload_cmd_common *common;
 	u32 enabled = 0, size;
 	u32 capa_flags = mvm->fw->ucode_capa.flags;
 #if IS_ENABLED(CONFIG_IPV6)
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	int i;
 	/*
 	 * Skip tentative address when ns offload is enabled to avoid
 	 * violating RFC4862.
 	 * Keep tentative address when ns offload is disabled so the NS packets
 	 * will not be filtered out and will wake up the host.
 	 */
 	bool skip_tentative = offload_ns;

 	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
 	    capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 		struct iwl_ns_config *nsc;
 		struct iwl_targ_addr *addrs;
 		int n_nsc, n_addrs;
 		int c;
 		int num_skipped = 0;

 		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 			nsc = cmd.v3s.ns_config;
 			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
 			addrs = cmd.v3s.targ_addrs;
 			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
 		} else {
 			nsc = cmd.v3l.ns_config;
 			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
 			addrs = cmd.v3l.targ_addrs;
 			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
 		}

 		/*
 		 * For each address we have (and that will fit) fill a target
 		 * address struct and combine for NS offload structs with the
 		 * solicited node addresses.
 		 */
 		for (i = 0, c = 0;
 		     i < mvmvif->num_target_ipv6_addrs &&
 		     i < n_addrs && c < n_nsc; i++) {
 			struct in6_addr solicited_addr;
 			int j;

 			if (skip_tentative &&
 			    test_bit(i, mvmvif->tentative_addrs)) {
 				num_skipped++;
 				continue;
 			}

 			addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
 						  &solicited_addr);
 			for (j = 0; j < c; j++)
 				if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
 						  &solicited_addr) == 0)
 					break;
 			if (j == c)
 				c++;
 			addrs[i].addr = mvmvif->target_ipv6_addrs[i];
 			addrs[i].config_num = cpu_to_le32(j);
 			nsc[j].dest_ipv6_addr = solicited_addr;
 			memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
 		}

 		if (mvmvif->num_target_ipv6_addrs - num_skipped)
 			enabled |= IWL_D3_PROTO_IPV6_VALID;

 		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
 			cmd.v3s.num_valid_ipv6_addrs =
 				cpu_to_le32(i - num_skipped);
 		else
 			cmd.v3l.num_valid_ipv6_addrs =
 				cpu_to_le32(i - num_skipped);
 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 		bool found = false;

 		BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
 			     sizeof(mvmvif->target_ipv6_addrs[0]));

 		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++) {
 			if (skip_tentative &&
 			    test_bit(i, mvmvif->tentative_addrs))
 				continue;

 			memcpy(cmd.v2.target_ipv6_addr[i],
 			       &mvmvif->target_ipv6_addrs[i],
 			       sizeof(cmd.v2.target_ipv6_addr[i]));

 			found = true;
 		}
 		if (found) {
 			enabled |= IWL_D3_PROTO_IPV6_VALID;
 			memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
 		}
 	} else {
 		bool found = false;
 		BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
 			     sizeof(mvmvif->target_ipv6_addrs[0]));

 		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++) {
 			if (skip_tentative &&
 			    test_bit(i, mvmvif->tentative_addrs))
 				continue;

 			memcpy(cmd.v1.target_ipv6_addr[i],
 			       &mvmvif->target_ipv6_addrs[i],
 			       sizeof(cmd.v1.target_ipv6_addr[i]));

 			found = true;
 		}

 		if (found) {
 			enabled |= IWL_D3_PROTO_IPV6_VALID;
 			memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
 		}
 	}

 	if (offload_ns && (enabled & IWL_D3_PROTO_IPV6_VALID))
 		enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 #endif
 	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 		common = &cmd.v3s.common;
 		size = sizeof(cmd.v3s);
 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 		common = &cmd.v3l.common;
 		size = sizeof(cmd.v3l);
 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 		common = &cmd.v2.common;
 		size = sizeof(cmd.v2);
 	} else {
 		common = &cmd.v1.common;
 		size = sizeof(cmd.v1);
 	}

 	if (vif->bss_conf.arp_addr_cnt) {
 		enabled |= IWL_D3_PROTO_OFFLOAD_ARP | IWL_D3_PROTO_IPV4_VALID;
 		common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 		memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
 	}

 	if (!disable_offloading)
 		common->enabled = cpu_to_le32(enabled);

 	hcmd.len[0] = size;
 	return iwl_mvm_send_cmd(mvm, &hcmd);
 }
	/******************************************************************************
	*
	* 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.
	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
	* Copyright(c) 2015 Intel Deutschland GmbH
	*
	* 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 <linuxwifi@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.
	* Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
	* Copyright(c) 2015 Intel Deutschland GmbH
	* 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/ipv6.h>
	#include <net/addrconf.h>
	#include <linux/bitops.h>
	#include "mvm.h"

	void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
	struct iwl_wowlan_config_cmd *cmd)
	{
	int i;

	/*
	* For QoS counters, we store the one to use next, so subtract 0x10
	* since the uCode will add 0x10 before using the value while we
	* increment after using the value (i.e. store the next value to use).
	*/
	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
	u16 seq = mvm_ap_sta->tid_data[i].seq_number;
	seq -= 0x10;
	cmd->qos_seq[i] = cpu_to_le16(seq);
	}
	}

	int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
	struct ieee80211_vif *vif,
	bool disable_offloading,
	bool offload_ns,
	u32 cmd_flags)
	{
	union {
	struct iwl_proto_offload_cmd_v1 v1;
	struct iwl_proto_offload_cmd_v2 v2;
	struct iwl_proto_offload_cmd_v3_small v3s;
	struct iwl_proto_offload_cmd_v3_large v3l;
	} cmd = {};
	struct iwl_host_cmd hcmd = {
	.id = PROT_OFFLOAD_CONFIG_CMD,
	.flags = cmd_flags,
	.data[0] = &cmd,
	.dataflags[0] = IWL_HCMD_DFL_DUP,
	};
	struct iwl_proto_offload_cmd_common *common;
	u32 enabled = 0, size;
	u32 capa_flags = mvm->fw->ucode_capa.flags;
	#if IS_ENABLED(CONFIG_IPV6)
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int i;
	/*
	* Skip tentative address when ns offload is enabled to avoid
	* violating RFC4862.
	* Keep tentative address when ns offload is disabled so the NS packets
	* will not be filtered out and will wake up the host.
	*/
	bool skip_tentative = offload_ns;

	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL \|\|
	capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
	struct iwl_ns_config *nsc;
	struct iwl_targ_addr *addrs;
	int n_nsc, n_addrs;
	int c;
	int num_skipped = 0;

	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
	nsc = cmd.v3s.ns_config;
	n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
	addrs = cmd.v3s.targ_addrs;
	n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
	} else {
	nsc = cmd.v3l.ns_config;
	n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
	addrs = cmd.v3l.targ_addrs;
	n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
	}

	/*
	* For each address we have (and that will fit) fill a target
	* address struct and combine for NS offload structs with the
	* solicited node addresses.
	*/
	for (i = 0, c = 0;
	i < mvmvif->num_target_ipv6_addrs &&
	i < n_addrs && c < n_nsc; i++) {
	struct in6_addr solicited_addr;
	int j;

	if (skip_tentative &&
	test_bit(i, mvmvif->tentative_addrs)) {
	num_skipped++;
	continue;
	}

	addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
	&solicited_addr);
	for (j = 0; j < c; j++)
	if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
	&solicited_addr) == 0)
	break;
	if (j == c)
	c++;
	addrs[i].addr = mvmvif->target_ipv6_addrs[i];
	addrs[i].config_num = cpu_to_le32(j);
	nsc[j].dest_ipv6_addr = solicited_addr;
	memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
	}

	if (mvmvif->num_target_ipv6_addrs - num_skipped)
	enabled \|= IWL_D3_PROTO_IPV6_VALID;

	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
	cmd.v3s.num_valid_ipv6_addrs =
	cpu_to_le32(i - num_skipped);
	else
	cmd.v3l.num_valid_ipv6_addrs =
	cpu_to_le32(i - num_skipped);
	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
	bool found = false;

	BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
	sizeof(mvmvif->target_ipv6_addrs[0]));

	for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
	IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++) {
	if (skip_tentative &&
	test_bit(i, mvmvif->tentative_addrs))
	continue;

	memcpy(cmd.v2.target_ipv6_addr[i],
	&mvmvif->target_ipv6_addrs[i],
	sizeof(cmd.v2.target_ipv6_addr[i]));

	found = true;
	}
	if (found) {
	enabled \|= IWL_D3_PROTO_IPV6_VALID;
	memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
	}
	} else {
	bool found = false;
	BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
	sizeof(mvmvif->target_ipv6_addrs[0]));

	for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
	IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++) {
	if (skip_tentative &&
	test_bit(i, mvmvif->tentative_addrs))
	continue;

	memcpy(cmd.v1.target_ipv6_addr[i],
	&mvmvif->target_ipv6_addrs[i],
	sizeof(cmd.v1.target_ipv6_addr[i]));

	found = true;
	}

	if (found) {
	enabled \|= IWL_D3_PROTO_IPV6_VALID;
	memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
	}
	}

	if (offload_ns && (enabled & IWL_D3_PROTO_IPV6_VALID))
	enabled \|= IWL_D3_PROTO_OFFLOAD_NS;
	#endif
	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
	common = &cmd.v3s.common;
	size = sizeof(cmd.v3s);
	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
	common = &cmd.v3l.common;
	size = sizeof(cmd.v3l);
	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
	common = &cmd.v2.common;
	size = sizeof(cmd.v2);
	} else {
	common = &cmd.v1.common;
	size = sizeof(cmd.v1);
	}

	if (vif->bss_conf.arp_addr_cnt) {
	enabled \|= IWL_D3_PROTO_OFFLOAD_ARP \| IWL_D3_PROTO_IPV4_VALID;
	common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
	memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
	}

	if (!disable_offloading)
	common->enabled = cpu_to_le32(enabled);

	hcmd.len[0] = size;
	return iwl_mvm_send_cmd(mvm, &hcmd);
	}