From 946b895f531194c995a1f70f99470695e8400113 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 3 May 2017 21:56:04 +0200
Subject: [PATCH 074/146] iwlwifi: mvm: disentangle union in TX status struct
Git-commit: a6a621934e2e041ad4a8b55ef273731794e936ed
Patch-mainline: v4.13-rc1
References: FATE#322675
This improves documentation, since kernel-doc can't deal with the
union well.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/net/wireless/intel/iwlwifi/mvm/fw-api-tx.h | 73 ++++++++++++++++++----
drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h | 3 +-
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h | 9 ++-
drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 3 +-
4 files changed, 69 insertions(+), 19 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-tx.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-tx.h
index a5a8616dad6f..0562ce406249 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-tx.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api-tx.h
@@ -513,7 +513,7 @@ struct agg_tx_status {
#define IWL_MVM_TX_RES_GET_RA(_ra_tid) ((_ra_tid) >> 4)
/**
- * struct iwl_mvm_tx_resp - notifies that fw is TXing a packet
+ * struct iwl_mvm_tx_resp_v3 - notifies that fw is TXing a packet
* ( REPLY_TX = 0x1c )
* @frame_count: 1 no aggregation, >1 aggregation
* @bt_kill_count: num of times blocked by bluetooth (unused for agg)
@@ -540,7 +540,63 @@ struct agg_tx_status {
* @tx_queue: TX queue for this response
* @status: for non-agg: frame status TX_STATUS_*
* for agg: status of 1st frame, AGG_TX_STATE_*; other frame status fields
- * follow this one, up to frame_count.
+ * follow this one, up to frame_count. Length in @frame_count.
+ *
+ * After the array of statuses comes the SSN of the SCD. Look at
+ * %iwl_mvm_get_scd_ssn for more details.
+ */
+struct iwl_mvm_tx_resp_v3 {
+ u8 frame_count;
+ u8 bt_kill_count;
+ u8 failure_rts;
+ u8 failure_frame;
+ __le32 initial_rate;
+ __le16 wireless_media_time;
+
+ u8 pa_status;
+ u8 pa_integ_res_a[3];
+ u8 pa_integ_res_b[3];
+ u8 pa_integ_res_c[3];
+ __le16 measurement_req_id;
+ u8 reduced_tpc;
+ u8 reserved;
+
+ __le32 tfd_info;
+ __le16 seq_ctl;
+ __le16 byte_cnt;
+ u8 tlc_info;
+ u8 ra_tid;
+ __le16 frame_ctrl;
+ struct agg_tx_status status[];
+} __packed; /* TX_RSP_API_S_VER_3 */
+
+/**
+ * struct iwl_mvm_tx_resp - notifies that fw is TXing a packet
+ * ( REPLY_TX = 0x1c )
+ * @frame_count: 1 no aggregation, >1 aggregation
+ * @bt_kill_count: num of times blocked by bluetooth (unused for agg)
+ * @failure_rts: num of failures due to unsuccessful RTS
+ * @failure_frame: num failures due to no ACK (unused for agg)
+ * @initial_rate: for non-agg: rate of the successful Tx. For agg: rate of the
+ * Tx of all the batch. RATE_MCS_*
+ * @wireless_media_time: for non-agg: RTS + CTS + frame tx attempts time + ACK.
+ * for agg: RTS + CTS + aggregation tx time + block-ack time.
+ * in usec.
+ * @pa_status: tx power info
+ * @pa_integ_res_a: tx power info
+ * @pa_integ_res_b: tx power info
+ * @pa_integ_res_c: tx power info
+ * @measurement_req_id: tx power info
+ * @reduced_tpc: transmit power reduction used
+ * @reserved: reserved
+ * @tfd_info: TFD information set by the FH
+ * @seq_ctl: sequence control from the Tx cmd
+ * @byte_cnt: byte count from the Tx cmd
+ * @tlc_info: TLC rate info
+ * @ra_tid: bits [3:0] = ra, bits [7:4] = tid
+ * @frame_ctrl: frame control
+ * @tx_queue: TX queue for this response
+ * @status: for non-agg: frame status TX_STATUS_*
* For version 6 TX response isn't received for aggregation at all.
*
* After the array of statuses comes the SSN of the SCD. Look at
@@ -568,16 +624,9 @@ struct iwl_mvm_tx_resp {
u8 tlc_info;
u8 ra_tid;
__le16 frame_ctrl;
- union {
- struct {
- struct agg_tx_status status;
- } v3;/* TX_RSP_API_S_VER_3 */
- struct {
- __le16 tx_queue;
- __le16 reserved2;
- struct agg_tx_status status;
- } v6;
- };
+ __le16 tx_queue;
+ __le16 reserved2;
+ struct agg_tx_status status;
} __packed; /* TX_RSP_API_S_VER_6 */
/**
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
index d73860e7954a..e8819a9f7ad2 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-api.h
@@ -217,7 +217,8 @@ enum iwl_legacy_cmds {
/**
* @TX_CMD: uses &struct iwl_tx_cmd or &struct iwl_tx_cmd_gen2,
- * response in &struct iwl_mvm_tx_resp
+ * response in &struct iwl_mvm_tx_resp or
+ * &struct iwl_mvm_tx_resp_v3
*/
TX_CMD = 0x1c,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index 1790face0ea5..619d3e7866d5 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1296,14 +1296,13 @@ static inline bool iwl_mvm_is_cdb_supported(struct iwl_mvm *mvm)
IWL_UCODE_TLV_CAPA_CDB_SUPPORT);
}
-static inline struct agg_tx_status*
-iwl_mvm_get_agg_status(struct iwl_mvm *mvm,
- struct iwl_mvm_tx_resp *tx_resp)
+static inline struct agg_tx_status *
+iwl_mvm_get_agg_status(struct iwl_mvm *mvm, void *tx_resp)
{
if (iwl_mvm_has_new_tx_api(mvm))
- return &tx_resp->v6.status;
+ return &((struct iwl_mvm_tx_resp *)tx_resp)->status;
else
- return &tx_resp->v3.status;
+ return ((struct iwl_mvm_tx_resp_v3 *)tx_resp)->status;
}
static inline bool iwl_mvm_is_tt_in_fw(struct iwl_mvm *mvm)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
index ae185fe7f0c5..04a42015f52f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c
@@ -1334,6 +1334,7 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
struct ieee80211_sta *sta;
u16 sequence = le16_to_cpu(pkt->hdr.sequence);
int txq_id = SEQ_TO_QUEUE(sequence);
+ /* struct iwl_mvm_tx_resp_v3 is almost the same */
struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
@@ -1351,7 +1352,7 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
__skb_queue_head_init(&skbs);
if (iwl_mvm_has_new_tx_api(mvm))
- txq_id = le16_to_cpu(tx_resp->v6.tx_queue);
+ txq_id = le16_to_cpu(tx_resp->tx_queue);
seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
--
2.12.3