drivers/net/wireless/intel/iwlwifi/mvm/offloading.c

   1 /******************************************************************************
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   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  10  * Copyright(c) 2015 Intel Deutschland GmbH
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  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  37  * Copyright(c) 2015 Intel Deutschland GmbH
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  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  66  *****************************************************************************/
  67 #include <net/ipv6.h>
  68 #include <net/addrconf.h>
  69 #include <linux/bitops.h>
  70 #include "mvm.h"
  71
  72 void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
  73                                 struct iwl_wowlan_config_cmd *cmd)
  74 {
  75         int i;
  76
  77         /*
  78          * For QoS counters, we store the one to use next, so subtract 0x10
  79          * since the uCode will add 0x10 *before* using the value while we
  80          * increment after using the value (i.e. store the next value to use).
  81          */
  82         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
  83                 u16 seq = mvm_ap_sta->tid_data[i].seq_number;
  84                 seq -= 0x10;
  85                 cmd->qos_seq[i] = cpu_to_le16(seq);
  86         }
  87 }
  88
  89 int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
  90                                struct ieee80211_vif *vif,
  91                                bool disable_offloading,
  92                                bool offload_ns,
  93                                u32 cmd_flags)
  94 {
  95         union {
  96                 struct iwl_proto_offload_cmd_v1 v1;
  97                 struct iwl_proto_offload_cmd_v2 v2;
  98                 struct iwl_proto_offload_cmd_v3_small v3s;
  99                 struct iwl_proto_offload_cmd_v3_large v3l;
 100         } cmd = {};
 101         struct iwl_host_cmd hcmd = {
 102                 .id = PROT_OFFLOAD_CONFIG_CMD,
 103                 .flags = cmd_flags,
 104                 .data[0] = &cmd,
 105                 .dataflags[0] = IWL_HCMD_DFL_DUP,
 106         };
 107         struct iwl_proto_offload_cmd_common *common;
 108         u32 enabled = 0, size;
 109         u32 capa_flags = mvm->fw->ucode_capa.flags;
 110 #if IS_ENABLED(CONFIG_IPV6)
 111         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 112         int i;
 113         /*
 114          * Skip tentative address when ns offload is enabled to avoid
 115          * violating RFC4862.
 116          * Keep tentative address when ns offload is disabled so the NS packets
 117          * will not be filtered out and will wake up the host.
 118          */
 119         bool skip_tentative = offload_ns;
 120
 121         if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
 122             capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 123                 struct iwl_ns_config *nsc;
 124                 struct iwl_targ_addr *addrs;
 125                 int n_nsc, n_addrs;
 126                 int c;
 127                 int num_skipped = 0;
 128
 129                 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 130                         nsc = cmd.v3s.ns_config;
 131                         n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
 132                         addrs = cmd.v3s.targ_addrs;
 133                         n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
 134                 } else {
 135                         nsc = cmd.v3l.ns_config;
 136                         n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
 137                         addrs = cmd.v3l.targ_addrs;
 138                         n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
 139                 }
 140
 141                 /*
 142                  * For each address we have (and that will fit) fill a target
 143                  * address struct and combine for NS offload structs with the
 144                  * solicited node addresses.
 145                  */
 146                 for (i = 0, c = 0;
 147                      i < mvmvif->num_target_ipv6_addrs &&
 148                      i < n_addrs && c < n_nsc; i++) {
 149                         struct in6_addr solicited_addr;
 150                         int j;
 151
 152                         if (skip_tentative &&
 153                             test_bit(i, mvmvif->tentative_addrs)) {
 154                                 num_skipped++;
 155                                 continue;
 156                         }
 157
 158                         addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
 159                                                   &solicited_addr);
 160                         for (j = 0; j < c; j++)
 161                                 if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
 162                                                   &solicited_addr) == 0)
 163                                         break;
 164                         if (j == c)
 165                                 c++;
 166                         addrs[i].addr = mvmvif->target_ipv6_addrs[i];
 167                         addrs[i].config_num = cpu_to_le32(j);
 168                         nsc[j].dest_ipv6_addr = solicited_addr;
 169                         memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
 170                 }
 171
 172                 if (mvmvif->num_target_ipv6_addrs - num_skipped)
 173                         enabled |= IWL_D3_PROTO_IPV6_VALID;
 174
 175                 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
 176                         cmd.v3s.num_valid_ipv6_addrs =
 177                                 cpu_to_le32(i - num_skipped);
 178                 else
 179                         cmd.v3l.num_valid_ipv6_addrs =
 180                                 cpu_to_le32(i - num_skipped);
 181         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 182                 bool found = false;
 183
 184                 BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
 185                              sizeof(mvmvif->target_ipv6_addrs[0]));
 186
 187                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 188                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++) {
 189                         if (skip_tentative &&
 190                             test_bit(i, mvmvif->tentative_addrs))
 191                                 continue;
 192
 193                         memcpy(cmd.v2.target_ipv6_addr[i],
 194                                &mvmvif->target_ipv6_addrs[i],
 195                                sizeof(cmd.v2.target_ipv6_addr[i]));
 196
 197                         found = true;
 198                 }
 199                 if (found) {
 200                         enabled |= IWL_D3_PROTO_IPV6_VALID;
 201                         memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
 202                 }
 203         } else {
 204                 bool found = false;
 205                 BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
 206                              sizeof(mvmvif->target_ipv6_addrs[0]));
 207
 208                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 209                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++) {
 210                         if (skip_tentative &&
 211                             test_bit(i, mvmvif->tentative_addrs))
 212                                 continue;
 213
 214                         memcpy(cmd.v1.target_ipv6_addr[i],
 215                                &mvmvif->target_ipv6_addrs[i],
 216                                sizeof(cmd.v1.target_ipv6_addr[i]));
 217
 218                         found = true;
 219                 }
 220
 221                 if (found) {
 222                         enabled |= IWL_D3_PROTO_IPV6_VALID;
 223                         memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
 224                 }
 225         }
 226
 227         if (offload_ns && (enabled & IWL_D3_PROTO_IPV6_VALID))
 228                 enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 229 #endif
 230         if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 231                 common = &cmd.v3s.common;
 232                 size = sizeof(cmd.v3s);
 233         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 234                 common = &cmd.v3l.common;
 235                 size = sizeof(cmd.v3l);
 236         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 237                 common = &cmd.v2.common;
 238                 size = sizeof(cmd.v2);
 239         } else {
 240                 common = &cmd.v1.common;
 241                 size = sizeof(cmd.v1);
 242         }
 243
 244         if (vif->bss_conf.arp_addr_cnt) {
 245                 enabled |= IWL_D3_PROTO_OFFLOAD_ARP | IWL_D3_PROTO_IPV4_VALID;
 246                 common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 247                 memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
 248         }
 249
 250         if (!disable_offloading)
 251                 common->enabled = cpu_to_le32(enabled);
 252
 253         hcmd.len[0] = size;
 254         return iwl_mvm_send_cmd(mvm, &hcmd);
 255 }