1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2021 Intel Corporation
4  * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5  * Copyright (C) 2015 Intel Deutschland GmbH
6  */
7 #include <net/ipv6.h>
8 #include <net/addrconf.h>
9 #include <linux/bitops.h>
10 #include "mvm.h"
11 
12 void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
13 				struct iwl_wowlan_config_cmd *cmd)
14 {
15 	int i;
16 
17 	/*
18 	 * For QoS counters, we store the one to use next, so subtract 0x10
19 	 * since the uCode will add 0x10 *before* using the value while we
20 	 * increment after using the value (i.e. store the next value to use).
21 	 */
22 	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
23 		u16 seq = mvm_ap_sta->tid_data[i].seq_number;
24 		seq -= 0x10;
25 		cmd->qos_seq[i] = cpu_to_le16(seq);
26 	}
27 }
28 
29 int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
30 			       struct ieee80211_vif *vif,
31 			       bool disable_offloading,
32 			       bool offload_ns,
33 			       u32 cmd_flags)
34 {
35 	union {
36 		struct iwl_proto_offload_cmd_v1 v1;
37 		struct iwl_proto_offload_cmd_v2 v2;
38 		struct iwl_proto_offload_cmd_v3_small v3s;
39 		struct iwl_proto_offload_cmd_v4 v4;
40 	} cmd = {};
41 	struct iwl_host_cmd hcmd = {
42 		.id = PROT_OFFLOAD_CONFIG_CMD,
43 		.flags = cmd_flags,
44 		.data[0] = &cmd,
45 		.dataflags[0] = IWL_HCMD_DFL_DUP,
46 	};
47 	struct iwl_proto_offload_cmd_common *common;
48 	u32 enabled = 0, size;
49 	u32 capa_flags = mvm->fw->ucode_capa.flags;
50 	int ver = iwl_fw_lookup_cmd_ver(mvm->fw, hcmd.id, 0);
51 
52 #if IS_ENABLED(CONFIG_IPV6)
53 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
54 	int i;
55 	/*
56 	 * Skip tentative address when ns offload is enabled to avoid
57 	 * violating RFC4862.
58 	 * Keep tentative address when ns offload is disabled so the NS packets
59 	 * will not be filtered out and will wake up the host.
60 	 */
61 	bool skip_tentative = offload_ns;
62 
63 	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
64 	    capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
65 		struct iwl_ns_config *nsc;
66 		struct iwl_targ_addr *addrs;
67 		int n_nsc, n_addrs;
68 		int c;
69 		int num_skipped = 0;
70 
71 		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
72 			nsc = cmd.v3s.ns_config;
73 			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
74 			addrs = cmd.v3s.targ_addrs;
75 			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
76 		} else {
77 			nsc = cmd.v4.ns_config;
78 			n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
79 			addrs = cmd.v4.targ_addrs;
80 			n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
81 		}
82 
83 		/*
84 		 * For each address we have (and that will fit) fill a target
85 		 * address struct and combine for NS offload structs with the
86 		 * solicited node addresses.
87 		 */
88 		for (i = 0, c = 0;
89 		     i < mvmvif->num_target_ipv6_addrs &&
90 		     i < n_addrs && c < n_nsc; i++) {
91 			struct in6_addr solicited_addr;
92 			int j;
93 
94 			if (skip_tentative &&
95 			    test_bit(i, mvmvif->tentative_addrs)) {
96 				num_skipped++;
97 				continue;
98 			}
99 
100 			addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
101 						  &solicited_addr);
102 			for (j = 0; j < c; j++)
103 				if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
104 						  &solicited_addr) == 0)
105 					break;
106 			if (j == c)
107 				c++;
108 			addrs[i].addr = mvmvif->target_ipv6_addrs[i];
109 			addrs[i].config_num = cpu_to_le32(j);
110 			nsc[j].dest_ipv6_addr = solicited_addr;
111 			memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
112 		}
113 
114 		if (mvmvif->num_target_ipv6_addrs - num_skipped)
115 			enabled |= IWL_D3_PROTO_IPV6_VALID;
116 
117 		if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
118 			cmd.v3s.num_valid_ipv6_addrs =
119 				cpu_to_le32(i - num_skipped);
120 		else
121 			cmd.v4.num_valid_ipv6_addrs =
122 				cpu_to_le32(i - num_skipped);
123 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
124 		bool found = false;
125 
126 		BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
127 			     sizeof(mvmvif->target_ipv6_addrs[0]));
128 
129 		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
130 				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++) {
131 			if (skip_tentative &&
132 			    test_bit(i, mvmvif->tentative_addrs))
133 				continue;
134 
135 			memcpy(cmd.v2.target_ipv6_addr[i],
136 			       &mvmvif->target_ipv6_addrs[i],
137 			       sizeof(cmd.v2.target_ipv6_addr[i]));
138 
139 			found = true;
140 		}
141 		if (found) {
142 			enabled |= IWL_D3_PROTO_IPV6_VALID;
143 			memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
144 		}
145 	} else {
146 		bool found = false;
147 		BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
148 			     sizeof(mvmvif->target_ipv6_addrs[0]));
149 
150 		for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
151 				    IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++) {
152 			if (skip_tentative &&
153 			    test_bit(i, mvmvif->tentative_addrs))
154 				continue;
155 
156 			memcpy(cmd.v1.target_ipv6_addr[i],
157 			       &mvmvif->target_ipv6_addrs[i],
158 			       sizeof(cmd.v1.target_ipv6_addr[i]));
159 
160 			found = true;
161 		}
162 
163 		if (found) {
164 			enabled |= IWL_D3_PROTO_IPV6_VALID;
165 			memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
166 		}
167 	}
168 
169 	if (offload_ns && (enabled & IWL_D3_PROTO_IPV6_VALID))
170 		enabled |= IWL_D3_PROTO_OFFLOAD_NS;
171 #endif
172 	if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
173 		common = &cmd.v3s.common;
174 		size = sizeof(cmd.v3s);
175 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
176 		common = &cmd.v4.common;
177 		size = sizeof(cmd.v4);
178 		if (ver < 4) {
179 			/*
180 			 * This basically uses iwl_proto_offload_cmd_v3_large
181 			 * which doesn't have the sta_id parameter before the
182 			 * common part.
183 			 */
184 			size -= sizeof(cmd.v4.sta_id);
185 			hcmd.data[0] = common;
186 		}
187 	} else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
188 		common = &cmd.v2.common;
189 		size = sizeof(cmd.v2);
190 	} else {
191 		common = &cmd.v1.common;
192 		size = sizeof(cmd.v1);
193 	}
194 
195 	if (vif->bss_conf.arp_addr_cnt) {
196 		enabled |= IWL_D3_PROTO_OFFLOAD_ARP | IWL_D3_PROTO_IPV4_VALID;
197 		common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
198 		memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
199 	}
200 
201 	if (!disable_offloading)
202 		common->enabled = cpu_to_le32(enabled);
203 
204 	hcmd.len[0] = size;
205 	return iwl_mvm_send_cmd(mvm, &hcmd);
206 }
207