offloading.c

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    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 }

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FreeBSD/Linux Kernel Cross Reference sys/contrib/dev/iwlwifi/mvm/offloading.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/iwlwifi/mvm/offloading.c