drivers/net/wireless/ath/ath11k/testmode.c

   1 // SPDX-License-Identifier: BSD-3-Clause-Clear
   2 /*
   3  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
   4  */
   5
   6 #include "testmode.h"
   7 #include <net/netlink.h>
   8 #include "debug.h"
   9 #include "wmi.h"
  10 #include "hw.h"
  11 #include "core.h"
  12 #include "testmode_i.h"
  13
  14 static const struct nla_policy ath11k_tm_policy[ATH11K_TM_ATTR_MAX + 1] = {
  15         [ATH11K_TM_ATTR_CMD]            = { .type = NLA_U32 },
  16         [ATH11K_TM_ATTR_DATA]           = { .type = NLA_BINARY,
  17                                             .len = ATH11K_TM_DATA_MAX_LEN },
  18         [ATH11K_TM_ATTR_WMI_CMDID]      = { .type = NLA_U32 },
  19         [ATH11K_TM_ATTR_VERSION_MAJOR]  = { .type = NLA_U32 },
  20         [ATH11K_TM_ATTR_VERSION_MINOR]  = { .type = NLA_U32 },
  21 };
  22
  23 /* Returns true if callee consumes the skb and the skb should be discarded.
  24  * Returns false if skb is not used. Does not sleep.
  25  */
  26 bool ath11k_tm_event_wmi(struct ath11k *ar, u32 cmd_id, struct sk_buff *skb)
  27 {
  28         struct sk_buff *nl_skb;
  29         bool consumed;
  30         int ret;
  31
  32         ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
  33                    "testmode event wmi cmd_id %d skb %pK skb->len %d\n",
  34                    cmd_id, skb, skb->len);
  35
  36         ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", skb->data, skb->len);
  37
  38         spin_lock_bh(&ar->data_lock);
  39
  40         consumed = true;
  41
  42         nl_skb = cfg80211_testmode_alloc_event_skb(ar->hw->wiphy,
  43                                                    2 * sizeof(u32) + skb->len,
  44                                                    GFP_ATOMIC);
  45         if (!nl_skb) {
  46                 ath11k_warn(ar->ab,
  47                             "failed to allocate skb for testmode wmi event\n");
  48                 goto out;
  49         }
  50
  51         ret = nla_put_u32(nl_skb, ATH11K_TM_ATTR_CMD, ATH11K_TM_CMD_WMI);
  52         if (ret) {
  53                 ath11k_warn(ar->ab,
  54                             "failed to put testmode wmi event cmd attribute: %d\n",
  55                             ret);
  56                 kfree_skb(nl_skb);
  57                 goto out;
  58         }
  59
  60         ret = nla_put_u32(nl_skb, ATH11K_TM_ATTR_WMI_CMDID, cmd_id);
  61         if (ret) {
  62                 ath11k_warn(ar->ab,
  63                             "failed to put testmode wmi even cmd_id: %d\n",
  64                             ret);
  65                 kfree_skb(nl_skb);
  66                 goto out;
  67         }
  68
  69         ret = nla_put(nl_skb, ATH11K_TM_ATTR_DATA, skb->len, skb->data);
  70         if (ret) {
  71                 ath11k_warn(ar->ab,
  72                             "failed to copy skb to testmode wmi event: %d\n",
  73                             ret);
  74                 kfree_skb(nl_skb);
  75                 goto out;
  76         }
  77
  78         cfg80211_testmode_event(nl_skb, GFP_ATOMIC);
  79
  80 out:
  81         spin_unlock_bh(&ar->data_lock);
  82
  83         return consumed;
  84 }
  85
  86 static int ath11k_tm_cmd_get_version(struct ath11k *ar, struct nlattr *tb[])
  87 {
  88         struct sk_buff *skb;
  89         int ret;
  90
  91         ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
  92                    "testmode cmd get version_major %d version_minor %d\n",
  93                    ATH11K_TESTMODE_VERSION_MAJOR,
  94                    ATH11K_TESTMODE_VERSION_MINOR);
  95
  96         skb = cfg80211_testmode_alloc_reply_skb(ar->hw->wiphy,
  97                                                 nla_total_size(sizeof(u32)));
  98         if (!skb)
  99                 return -ENOMEM;
 100
 101         ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MAJOR,
 102                           ATH11K_TESTMODE_VERSION_MAJOR);
 103         if (ret) {
 104                 kfree_skb(skb);
 105                 return ret;
 106         }
 107
 108         ret = nla_put_u32(skb, ATH11K_TM_ATTR_VERSION_MINOR,
 109                           ATH11K_TESTMODE_VERSION_MINOR);
 110         if (ret) {
 111                 kfree_skb(skb);
 112                 return ret;
 113         }
 114
 115         return cfg80211_testmode_reply(skb);
 116 }
 117
 118 static int ath11k_tm_cmd_wmi(struct ath11k *ar, struct nlattr *tb[])
 119 {
 120         struct ath11k_pdev_wmi *wmi = ar->wmi;
 121         struct sk_buff *skb;
 122         u32 cmd_id, buf_len;
 123         int ret;
 124         void *buf;
 125
 126         mutex_lock(&ar->conf_mutex);
 127
 128         if (ar->state != ATH11K_STATE_ON) {
 129                 ret = -ENETDOWN;
 130                 goto out;
 131         }
 132
 133         if (!tb[ATH11K_TM_ATTR_DATA]) {
 134                 ret = -EINVAL;
 135                 goto out;
 136         }
 137
 138         if (!tb[ATH11K_TM_ATTR_WMI_CMDID]) {
 139                 ret = -EINVAL;
 140                 goto out;
 141         }
 142
 143         buf = nla_data(tb[ATH11K_TM_ATTR_DATA]);
 144         buf_len = nla_len(tb[ATH11K_TM_ATTR_DATA]);
 145         cmd_id = nla_get_u32(tb[ATH11K_TM_ATTR_WMI_CMDID]);
 146
 147         ath11k_dbg(ar->ab, ATH11K_DBG_TESTMODE,
 148                    "testmode cmd wmi cmd_id %d buf %pK buf_len %d\n",
 149                    cmd_id, buf, buf_len);
 150
 151         ath11k_dbg_dump(ar->ab, ATH11K_DBG_TESTMODE, NULL, "", buf, buf_len);
 152
 153         skb = ath11k_wmi_alloc_skb(wmi->wmi_ab, buf_len);
 154         if (!skb) {
 155                 ret = -ENOMEM;
 156                 goto out;
 157         }
 158
 159         memcpy(skb->data, buf, buf_len);
 160
 161         ret = ath11k_wmi_cmd_send(wmi, skb, cmd_id);
 162         if (ret) {
 163                 dev_kfree_skb(skb);
 164                 ath11k_warn(ar->ab, "failed to transmit wmi command (testmode): %d\n",
 165                             ret);
 166                 goto out;
 167         }
 168
 169         ret = 0;
 170
 171 out:
 172         mutex_unlock(&ar->conf_mutex);
 173         return ret;
 174 }
 175
 176 int ath11k_tm_cmd(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 177                   void *data, int len)
 178 {
 179         struct ath11k *ar = hw->priv;
 180         struct nlattr *tb[ATH11K_TM_ATTR_MAX + 1];
 181         int ret;
 182
 183         ret = nla_parse(tb, ATH11K_TM_ATTR_MAX, data, len, ath11k_tm_policy,
 184                         NULL);
 185         if (ret)
 186                 return ret;
 187
 188         if (!tb[ATH11K_TM_ATTR_CMD])
 189                 return -EINVAL;
 190
 191         switch (nla_get_u32(tb[ATH11K_TM_ATTR_CMD])) {
 192         case ATH11K_TM_CMD_GET_VERSION:
 193                 return ath11k_tm_cmd_get_version(ar, tb);
 194         case ATH11K_TM_CMD_WMI:
 195                 return ath11k_tm_cmd_wmi(ar, tb);
 196         default:
 197                 return -EOPNOTSUPP;
 198         }
 199 }