iwlwifi: mvm: rs: fix search cycle rules

We should explore all possible columns when searching to be
as resilient as possible to changing conditions. This fixes
for example a scenario where even after a sudden creation of
rssi difference between the 2 antennas we would keep doing MIMO
at a low rate instead of switching to SISO at a higher rate using
the better antenna which was the optimal configuration.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c
index ad83342..4e16d7c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/rs.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rs.c
@@ -211,9 +211,9 @@ static const struct rs_tx_column rs_tx_columns[] = {
                .next_columns = {
                        RS_COLUMN_LEGACY_ANT_B,
                        RS_COLUMN_SISO_ANT_A,
+                       RS_COLUMN_SISO_ANT_B,
                        RS_COLUMN_MIMO2,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_MIMO2_SGI,
                },
        },
        [RS_COLUMN_LEGACY_ANT_B] = {
@@ -221,10 +221,10 @@ static const struct rs_tx_column rs_tx_columns[] = {
                .ant = ANT_B,
                .next_columns = {
                        RS_COLUMN_LEGACY_ANT_A,
+                       RS_COLUMN_SISO_ANT_A,
                        RS_COLUMN_SISO_ANT_B,
                        RS_COLUMN_MIMO2,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_MIMO2_SGI,
                },
        },
        [RS_COLUMN_SISO_ANT_A] = {
@@ -234,8 +234,8 @@ static const struct rs_tx_column rs_tx_columns[] = {
                        RS_COLUMN_SISO_ANT_B,
                        RS_COLUMN_MIMO2,
                        RS_COLUMN_SISO_ANT_A_SGI,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_SISO_ANT_B_SGI,
+                       RS_COLUMN_MIMO2_SGI,
                },
                .checks = {
                        rs_siso_allow,
@@ -248,8 +248,8 @@ static const struct rs_tx_column rs_tx_columns[] = {
                        RS_COLUMN_SISO_ANT_A,
                        RS_COLUMN_MIMO2,
                        RS_COLUMN_SISO_ANT_B_SGI,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_SISO_ANT_A_SGI,
+                       RS_COLUMN_MIMO2_SGI,
                },
                .checks = {
                        rs_siso_allow,
@@ -263,8 +263,8 @@ static const struct rs_tx_column rs_tx_columns[] = {
                        RS_COLUMN_SISO_ANT_B_SGI,
                        RS_COLUMN_MIMO2_SGI,
                        RS_COLUMN_SISO_ANT_A,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_SISO_ANT_B,
+                       RS_COLUMN_MIMO2,
                },
                .checks = {
                        rs_siso_allow,
@@ -279,8 +279,8 @@ static const struct rs_tx_column rs_tx_columns[] = {
                        RS_COLUMN_SISO_ANT_A_SGI,
                        RS_COLUMN_MIMO2_SGI,
                        RS_COLUMN_SISO_ANT_B,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
+                       RS_COLUMN_SISO_ANT_A,
+                       RS_COLUMN_MIMO2,
                },
                .checks = {
                        rs_siso_allow,
@@ -292,10 +292,10 @@ static const struct rs_tx_column rs_tx_columns[] = {
                .ant = ANT_AB,
                .next_columns = {
                        RS_COLUMN_SISO_ANT_A,
+                       RS_COLUMN_SISO_ANT_B,
+                       RS_COLUMN_SISO_ANT_A_SGI,
+                       RS_COLUMN_SISO_ANT_B_SGI,
                        RS_COLUMN_MIMO2_SGI,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
                },
                .checks = {
                        rs_mimo_allow,
@@ -307,10 +307,10 @@ static const struct rs_tx_column rs_tx_columns[] = {
                .sgi = true,
                .next_columns = {
                        RS_COLUMN_SISO_ANT_A_SGI,
+                       RS_COLUMN_SISO_ANT_B_SGI,
+                       RS_COLUMN_SISO_ANT_A,
+                       RS_COLUMN_SISO_ANT_B,
                        RS_COLUMN_MIMO2,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
-                       RS_COLUMN_INVALID,
                },
                .checks = {
                        rs_mimo_allow,