iwlwifi: mvm: add lq_cmd/tx_resp reduced_tpc field

The fw recently added an option to set tx power reduction
per station (in the lq_cmd command), and get the tx power
reduction used (in the tx_resp struct).

Use them and propogate this value up to mac80211's tx
response (in order to use it later in the rate-scaling
algorithm).

Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h
index 39148b5..8bb5b94 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-rs.h
@@ -334,7 +334,7 @@ enum {
  */
 struct iwl_lq_cmd {
        u8 sta_id;
-       u8 reserved1;
+       u8 reduced_tpc;
        u16 control;
        /* LINK_QUAL_GENERAL_PARAMS_API_S_VER_1 */
        u8 flags;

diff --git a/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
index 8e122f3..6cc5f52 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
+++ b/drivers/net/wireless/iwlwifi/mvm/fw-api-tx.h
@@ -482,7 +482,8 @@ struct iwl_mvm_tx_resp {
        u8 pa_integ_res_b[3];
        u8 pa_integ_res_c[3];
        __le16 measurement_req_id;
-       __le16 reserved;
+       u8 reduced_tpc;
+       u8 reserved;
 
        __le32 tfd_info;
        __le16 seq_ctl;

diff --git a/drivers/net/wireless/iwlwifi/mvm/sta.h b/drivers/net/wireless/iwlwifi/mvm/sta.h
index 2ed84c4..e5e3071 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/sta.h
+++ b/drivers/net/wireless/iwlwifi/mvm/sta.h
@@ -253,6 +253,8 @@ enum iwl_mvm_agg_state {
  *     This is basically (last acked packet++).
  * @rate_n_flags: Rate at which Tx was attempted. Holds the data between the
  *     Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA).
+ * @reduced_tpc: Reduced tx power. Holds the data between the
+ *     Tx response (TX_CMD), and the block ack notification (COMPRESSED_BA).
  * @state: state of the BA agreement establishment / tear down.
  * @txq_id: Tx queue used by the BA session
  * @ssn: the first packet to be sent in AGG HW queue in Tx AGG start flow, or
@@ -265,6 +267,7 @@ struct iwl_mvm_tid_data {
        u16 next_reclaimed;
        /* The rest is Tx AGG related */
        u32 rate_n_flags;
+       u8 reduced_tpc;
        enum iwl_mvm_agg_state state;
        u16 txq_id;
        u16 ssn;

diff --git a/drivers/net/wireless/iwlwifi/mvm/tx.c b/drivers/net/wireless/iwlwifi/mvm/tx.c
index 879aeac..0a4ad45 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/tx.c
@@ -636,6 +636,10 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
                        seq_ctl = le16_to_cpu(hdr->seq_ctrl);
                }
 
+               BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
+               info->status.status_driver_data[0] =
+                               (void *)(uintptr_t)tx_resp->reduced_tpc;
+
                ieee80211_tx_status_ni(mvm->hw, skb);
        }
 
@@ -815,6 +819,7 @@ static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
                struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
                mvmsta->tid_data[tid].rate_n_flags =
                        le32_to_cpu(tx_resp->initial_rate);
+               mvmsta->tid_data[tid].reduced_tpc = tx_resp->reduced_tpc;
        }
 
        rcu_read_unlock();
@@ -928,6 +933,8 @@ int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
                        info->status.ampdu_len = ba_notif->txed;
                        iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
                                                    info);
+                       info->status.status_driver_data[0] =
+                               (void *)(uintptr_t)tid_data->reduced_tpc;
                }
        }