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iwlwifi: mvm: allow to force the Rx chains from debugfs
This is useful to debug weird antenna problems. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
parent
0522588d2f
commit
ddf89ab10a
3 changed files with 57 additions and 0 deletions
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@ -545,6 +545,57 @@ static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
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return ret ? count : -EINVAL;
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}
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static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf,
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size_t count, loff_t *ppos)
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{
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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struct iwl_mvm *mvm = mvmvif->mvm;
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struct ieee80211_chanctx_conf *chanctx_conf;
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struct iwl_mvm_phy_ctxt *phy_ctxt;
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u16 value;
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int ret;
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ret = kstrtou16(buf, 0, &value);
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if (ret)
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return ret;
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mutex_lock(&mvm->mutex);
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rcu_read_lock();
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chanctx_conf = rcu_dereference(vif->chanctx_conf);
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/* make sure the channel context is assigned */
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if (!chanctx_conf) {
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rcu_read_unlock();
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mutex_unlock(&mvm->mutex);
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return -EINVAL;
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}
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phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv];
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rcu_read_unlock();
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mvm->dbgfs_rx_phyinfo = value;
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ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def,
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chanctx_conf->rx_chains_static,
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chanctx_conf->rx_chains_dynamic);
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mutex_unlock(&mvm->mutex);
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return ret ?: count;
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}
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static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file,
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char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ieee80211_vif *vif = file->private_data;
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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char buf[8];
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snprintf(buf, sizeof(buf), "0x%04x\n", mvmvif->mvm->dbgfs_rx_phyinfo);
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return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
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}
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#define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
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_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
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#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
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@ -560,6 +611,7 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
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MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
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MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
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MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
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MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
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void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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{
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@ -595,6 +647,8 @@ void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
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S_IRUSR | S_IWUSR);
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MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir,
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S_IRUSR | S_IWUSR);
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MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir,
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S_IRUSR | S_IWUSR);
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if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
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mvmvif == mvm->bf_allowed_vif)
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@ -681,6 +681,7 @@ struct iwl_mvm {
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struct iwl_mvm_frame_stats drv_rx_stats;
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spinlock_t drv_stats_lock;
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u16 dbgfs_rx_phyinfo;
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#endif
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struct iwl_mvm_phy_ctxt phy_ctxts[NUM_PHY_CTX];
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@ -175,6 +175,8 @@ static void iwl_mvm_phy_ctxt_cmd_data(struct iwl_mvm *mvm,
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cmd->rxchain_info |= cpu_to_le32(idle_cnt << PHY_RX_CHAIN_CNT_POS);
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cmd->rxchain_info |= cpu_to_le32(active_cnt <<
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PHY_RX_CHAIN_MIMO_CNT_POS);
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if (unlikely(mvm->dbgfs_rx_phyinfo))
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cmd->rxchain_info = cpu_to_le32(mvm->dbgfs_rx_phyinfo);
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cmd->txchain_info = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
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}
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