summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/intel/iwlwifi/mvm/offloading.c
blob: 6d71e05626ad8094e55a2c5d7ee538bfc41a13ba (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
/******************************************************************************
 *
 * 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.
 *
 * 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);
}