iwlwifi: mvm: Add support for new rate_n_flags in tx_cmd.

As part of the new rate_n_flags, tx_cmd API has changed.
Add support for these changes.
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211017162352.26efa51624b1.Ic96ae4d81b3ff07fb514df2b5f6a8e470e4d3778@changeidSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

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

@@ -267,7 +267,8 @@ struct iwl_tx_cmd_gen2 {
 	struct iwl_dram_sec_info dram_info;
 	__le32 rate_n_flags;
 	struct ieee80211_hdr hdr[];
-} __packed; /* TX_CMD_API_S_VER_7 */
+} __packed; /* TX_CMD_API_S_VER_7,
+	       TX_CMD_API_S_VER_9 */
 
 /**
  * struct iwl_tx_cmd_gen3 - TX command struct to FW for AX210+ devices
@@ -290,7 +291,8 @@ struct iwl_tx_cmd_gen3 {
 	__le32 rate_n_flags;
 	__le64 ttl;
 	struct ieee80211_hdr hdr[];
-} __packed; /* TX_CMD_API_S_VER_8 */
+} __packed; /* TX_CMD_API_S_VER_8,
+	       TX_CMD_API_S_VER_10 */
 
 /*
  * TX response related data

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

@@ -1240,7 +1240,7 @@ static int _iwl_dbgfs_inject_beacon_ie(struct iwl_mvm *mvm, char *bin, int len)
 	mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	info = IEEE80211_SKB_CB(beacon);
 	rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
-	flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
+	flags = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate);
 
 	if (rate == IWL_FIRST_CCK_RATE)
 		flags |= IWL_MAC_BEACON_CCK;

drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c

@@ -844,7 +844,8 @@ static void iwl_mvm_mac_ctxt_set_tx(struct iwl_mvm *mvm,
 
 	rate = iwl_mvm_mac_ctxt_get_lowest_rate(info, vif);
 
-	tx->rate_n_flags |= cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(rate));
+	tx->rate_n_flags |=
+		cpu_to_le32(iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate));
 	if (rate == IWL_FIRST_CCK_RATE)
 		tx->rate_n_flags |= cpu_to_le32(RATE_MCS_CCK_MSK_V1);
 
@@ -930,7 +931,7 @@ static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm,
 	struct ieee80211_chanctx_conf *ctx;
 	int channel;
 
-	flags = iwl_mvm_mac80211_idx_to_hwrate(rate);
+	flags = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate);
 
 	if (rate == IWL_FIRST_CCK_RATE)
 		flags |= IWL_MAC_BEACON_CCK;

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -1448,7 +1448,7 @@ int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
 			       enum nl80211_band band,
 			       struct ieee80211_tx_rate *r);
-u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx);
+u8 iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw *fw, int rate_idx);
 u8 iwl_mvm_mac80211_ac_to_ucode_ac(enum ieee80211_ac_numbers ac);
 
 static inline void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm)

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

@@ -268,6 +268,7 @@ static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 	int rate_idx = -1;
 	u8 rate_plcp;
 	u32 rate_flags = 0;
+	bool is_cck;
 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
 
 	/* info->control is only relevant for non HW rate control */
@@ -299,11 +300,18 @@ static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
 	BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
 
 	/* Get PLCP rate for tx_cmd->rate_n_flags */
-	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
+	rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(mvm->fw, rate_idx);
+	is_cck = (rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE);
 
-	/* Set CCK flag as needed */
-	if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
+	/* Set CCK or OFDM flag */
+	if (iwl_fw_lookup_cmd_ver(mvm->fw, LONG_GROUP, TX_CMD, 0) > 8) {
+		if (!is_cck)
+			rate_flags |= RATE_MCS_LEGACY_OFDM_MSK;
+		else
+			rate_flags |= RATE_MCS_CCK_MSK;
+	} else if (is_cck) {
 		rate_flags |= RATE_MCS_CCK_MSK_V1;
+	}
 
 	return (u32)rate_plcp | rate_flags;
 }

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

@@ -152,9 +152,17 @@ int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
 	return -1;
 }
 
-u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx)
+u8 iwl_mvm_mac80211_idx_to_hwrate(const struct iwl_fw *fw, int rate_idx)
 {
-	/* Get PLCP rate for tx_cmd->rate_n_flags */
+	if (iwl_fw_lookup_cmd_ver(fw, LONG_GROUP,
+				  TX_CMD, 0) > 8)
+		/* In the new rate legacy rates are indexed:
+		 * 0 - 3 for CCK and 0 - 7 for OFDM.
+		 */
+		return (rate_idx >= IWL_FIRST_OFDM_RATE ?
+			rate_idx - IWL_FIRST_OFDM_RATE :
+			rate_idx);
+
 	return iwl_fw_rate_idx_to_plcp(rate_idx);
 }