wifi: iwlwifi: support RX BAID modify command version 3

Version 3 of the RX BAID allocation modify command shrinks the tid
field to a u8 and adds a window size field, so that the window size
can be updated while moving a BAID to a new AP. A window size of 0
tells the firmware to keep the current one, which is what we need
for now.

Add the new layout and pick it based on the command version.

Assisted-by: LLM
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://patch.msgid.link/20260926201527.46c77de75c0b.Ie41b1d43f945a0c5e2bb68981a0cec0c62111233@changeid
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>

2 files changed, 30 insertions, 6 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
index b17babef71c0..3fbcb2e4bfe0 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/api/datapath.h
@@ -522,18 +522,35 @@ struct iwl_rx_baid_cfg_cmd_alloc {
 } __packed; /* RX_BAID_ALLOCATION_ADD_CMD_API_S_VER_1 */
 
 /**
- * struct iwl_rx_baid_cfg_cmd_modify - BAID modification data
+ * struct iwl_rx_baid_cfg_cmd_modify_v2 - BAID modification data
  * @old_sta_id_mask: old station ID mask
  * @new_sta_id_mask: new station ID mask
  * @tid: TID of the BAID
  */
-struct iwl_rx_baid_cfg_cmd_modify {
+struct iwl_rx_baid_cfg_cmd_modify_v2 {
 	__le32 old_sta_id_mask;
 	__le32 new_sta_id_mask;
 	__le32 tid;
 } __packed; /* RX_BAID_ALLOCATION_MODIFY_CMD_API_S_VER_2 */
 
 /**
+ * struct iwl_rx_baid_cfg_cmd_modify - BAID modification data
+ * @old_sta_id_mask: old station ID mask
+ * @new_sta_id_mask: new station ID mask
+ * @tid: TID of the BAID
+ * @reserved: reserved
+ * @win_size: RX BA session window size to apply to the modified BAID,
+ *	0 means keep the current one
+ */
+struct iwl_rx_baid_cfg_cmd_modify {
+	__le32 old_sta_id_mask;
+	__le32 new_sta_id_mask;
+	u8 tid;
+	u8 reserved;
+	__le16 win_size;
+} __packed; /* RX_BAID_ALLOCATION_MODIFY_CMD_API_S_VER_3 */
+
+/**
  * struct iwl_rx_baid_cfg_cmd_remove_v1 - BAID removal data
  * @baid: the BAID to remove
  */
@@ -555,7 +572,8 @@ struct iwl_rx_baid_cfg_cmd_remove {
  * struct iwl_rx_baid_cfg_cmd - BAID allocation/config command
  * @action: the action, from &enum iwl_rx_baid_action
  * @alloc: allocation data
- * @modify: modify data
+ * @modify_v2: modify data (version 2)
+ * @modify: modify data (version 3)
  * @remove_v1: remove data (version 1)
  * @remove: remove data
  */
@@ -563,11 +581,12 @@ struct iwl_rx_baid_cfg_cmd {
 	__le32 action;
 	union {
 		struct iwl_rx_baid_cfg_cmd_alloc alloc;
+		struct iwl_rx_baid_cfg_cmd_modify_v2 modify_v2;
 		struct iwl_rx_baid_cfg_cmd_modify modify;
 		struct iwl_rx_baid_cfg_cmd_remove_v1 remove_v1;
 		struct iwl_rx_baid_cfg_cmd_remove remove;
-	}; /* RX_BAID_ALLOCATION_OPERATION_API_U_VER_2 */
-} __packed; /* RX_BAID_ALLOCATION_CONFIG_CMD_API_S_VER_2 */
+	}; /* RX_BAID_ALLOCATION_OPERATION_API_U_VER_3 */
+} __packed; /* RX_BAID_ALLOCATION_CONFIG_CMD_API_S_VER_3 */
 
 /**
  * struct iwl_rx_baid_cfg_resp - BAID allocation response
diff --git a/drivers/net/wireless/intel/iwlwifi/mld/agg.c b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
index c45c47337509..ea1f02380ad4 100644
--- a/drivers/net/wireless/intel/iwlwifi/mld/agg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mld/agg.c
@@ -660,6 +660,7 @@ int iwl_mld_update_sta_baids(struct iwl_mld *mld,
 		.modify.new_sta_id_mask = cpu_to_le32(new_sta_mask),
 	};
 	u32 cmd_id = WIDE_ID(DATA_PATH_GROUP, RX_BAID_ALLOCATION_CONFIG_CMD);
+	u8 cmd_ver = iwl_fw_lookup_cmd_ver(mld->fw, cmd_id, 2);
 	int baid;
 
 	/* mac80211 will remove sessions later, but we ignore all that */
@@ -667,6 +668,7 @@ int iwl_mld_update_sta_baids(struct iwl_mld *mld,
 		return 0;
 
 	BUILD_BUG_ON(sizeof(struct iwl_rx_baid_cfg_resp) != sizeof(baid));
+	BUILD_BUG_ON(sizeof(cmd.modify) != sizeof(cmd.modify_v2));
 
 	for (baid = 0; baid < ARRAY_SIZE(mld->fw_id_to_ba); baid++) {
 		struct iwl_mld_baid_data *data;
@@ -683,7 +685,10 @@ int iwl_mld_update_sta_baids(struct iwl_mld *mld,
 			  "BAID data for %d corrupted - expected 0x%x found 0x%x\n",
 			  baid, old_sta_mask, data->sta_mask);
 
-		cmd.modify.tid = cpu_to_le32(data->tid);
+		if (cmd_ver >= 3)
+			cmd.modify.tid = data->tid;
+		else
+			cmd.modify_v2.tid = cpu_to_le32(data->tid);
 
 		ret = iwl_mld_send_cmd_pdu(mld, cmd_id, &cmd);
 		if (ret)