wifi: iwlwifi: mvm: move RU alloc B2 placement

The firmware was trying to report the B2 RU allocation in
the place previously used here as well, but there's a HW
block that clears the lower 8 bits in this metadata word
even in sniffer mode. Thus, firmware moved B2 to another
place, follow that.

There's no need to detect the version since moving it to
the other place if firmware didn't just means that we'll
continue to report the (erroneous) zero value, and it's
not really something we can detect from the firmware now.

While debugging this we realized that the comments about
placement in the metadata dwords are wrong, update them.
Reported-by: Youhan Kim <youhank@qti.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230830112059.dec7f1e07ff8.I623fee2d710cc7b6f392d65b708883ed58632b45@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/rx.h

 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 /*
- * Copyright (C) 2012-2014, 2018-2022 Intel Corporation
+ * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
  * Copyright (C) 2015-2017 Intel Deutschland GmbH
  */
@@ -371,7 +371,7 @@ enum iwl_rx_phy_eht_data1 {
 	IWL_RX_PHY_DATA1_EHT_RU_ALLOC_B1_B7		= 0x0000fe00,
 };
 
-/* goes into Metadata DW 7 */
+/* goes into Metadata DW 7 (Qu) or 8 (So or higher) */
 enum iwl_rx_phy_he_data2 {
 	/* info type: HE MU-EXT */
 	/* the a1/a2/... is what the PHY/firmware calls the values */
@@ -387,7 +387,7 @@ enum iwl_rx_phy_he_data2 {
 	IWL_RX_PHY_DATA2_HE_TB_EXT_SPTL_REUSE4		= 0x0000f000,
 };
 
-/* goes into Metadata DW 8 */
+/* goes into Metadata DW 8 (Qu) or 7 (So or higher) */
 enum iwl_rx_phy_he_data3 {
 	/* info type: HE MU-EXT */
 	IWL_RX_PHY_DATA3_HE_MU_EXT_CH1_RU1		= 0x000000ff, /* c1 */
@@ -408,10 +408,9 @@ enum iwl_rx_phy_he_he_data4 {
 	IWL_RX_PHY_DATA4_HE_MU_EXT_PREAMBLE_PUNC_TYPE_MASK	= 0x0600,
 };
 
-/* goes into Metadata DW 7 */
+/* goes into Metadata DW 8 (Qu has no EHT) */
 enum iwl_rx_phy_eht_data2 {
 	/* info type: EHT-MU-EXT */
-	/* OFDM_RX_VECTOR_COMMON_RU_ALLOC_0_OUT */
 	IWL_RX_PHY_DATA2_EHT_MU_EXT_RU_ALLOC_A1	= 0x000001ff,
 	IWL_RX_PHY_DATA2_EHT_MU_EXT_RU_ALLOC_A2	= 0x0003fe00,
 	IWL_RX_PHY_DATA2_EHT_MU_EXT_RU_ALLOC_B1	= 0x07fc0000,
@@ -420,11 +419,10 @@ enum iwl_rx_phy_eht_data2 {
 	IWL_RX_PHY_DATA2_EHT_TB_EXT_TRIG_SIGA1	= 0xffffffff,
 };
 
-/* goes into Metadata DW 8 */
+/* goes into Metadata DW 7 (Qu has no EHT) */
 enum iwl_rx_phy_eht_data3 {
+	/* note: low 8 bits cannot be used */
 	/* info type: EHT-MU-EXT */
-	/* OFDM_RX_VECTOR_COMMON_RU_ALLOC_1_OUT */
-	IWL_RX_PHY_DATA3_EHT_MU_EXT_RU_ALLOC_B2	= 0x000001ff,
 	IWL_RX_PHY_DATA3_EHT_MU_EXT_RU_ALLOC_C1	= 0x0003fe00,
 	IWL_RX_PHY_DATA3_EHT_MU_EXT_RU_ALLOC_C2	= 0x07fc0000,
 };
@@ -432,10 +430,10 @@ enum iwl_rx_phy_eht_data3 {
 /* goes into Metadata DW 4 */
 enum iwl_rx_phy_eht_data4 {
 	/* info type: EHT-MU-EXT */
-	/* OFDM_RX_VECTOR_COMMON_RU_ALLOC_2_OUT */
 	IWL_RX_PHY_DATA4_EHT_MU_EXT_RU_ALLOC_D1	= 0x000001ff,
 	IWL_RX_PHY_DATA4_EHT_MU_EXT_RU_ALLOC_D2	= 0x0003fe00,
 	IWL_RX_PHY_DATA4_EHT_MU_EXT_SIGB_MCS	= 0x000c0000,
+	IWL_RX_PHY_DATA4_EHT_MU_EXT_RU_ALLOC_B2	= 0x1ff00000,
 };
 
 /* goes into Metadata DW 16 */

drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c

@@ -1507,7 +1507,7 @@ static void iwl_mvm_decode_he_phy_data(struct iwl_mvm *mvm,
 #define IWL_RX_RU_DATA_A1			2
 #define IWL_RX_RU_DATA_A2			2
 #define IWL_RX_RU_DATA_B1			2
-#define IWL_RX_RU_DATA_B2			3
+#define IWL_RX_RU_DATA_B2			4
 #define IWL_RX_RU_DATA_C1			3
 #define IWL_RX_RU_DATA_C2			3
 #define IWL_RX_RU_DATA_D1			4