iwlwifi: mvm: add ATPC implementation
Implement Adaptive Tx Power Control algorithm.
ATPC basically tries to decrease the tx power
as much as possible while the throughput is
not being hurt.
Signed-off-by: Eliad Peller <eliadx.peller@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.h b/drivers/net/wireless/iwlwifi/mvm/rs.h
index 3332b39..d8b0345 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rs.h
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.h
@@ -157,6 +157,13 @@
#define IWL_RATE_INCREASE_TH 6400 /* 50% */
#define RS_SR_FORCE_DECREASE 1920 /* 15% */
+#define TPC_SR_FORCE_INCREASE 9600 /* 75% */
+#define TPC_SR_NO_INCREASE 10880 /* 85% */
+#define TPC_TX_POWER_STEP 3
+#define TPC_MAX_REDUCTION 15
+#define TPC_NO_REDUCTION 0
+#define TPC_INVALID 0xff
+
#define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000) /* 4 milliseconds */
#define LINK_QUAL_AGG_TIME_LIMIT_MAX (8000)
#define LINK_QUAL_AGG_TIME_LIMIT_MIN (100)
@@ -279,6 +286,8 @@
enum rs_column column;
const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */
struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
+ /* per txpower-reduction history */
+ struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
};
enum {
@@ -337,6 +346,9 @@
u32 last_rate_n_flags;
/* packets destined for this STA are aggregated */
u8 is_agg;
+
+ /* tx power reduce for this sta */
+ int tpc_reduce;
};
/* Initialize station's rate scaling information after adding station */