ath10k: debugfs support to get final TPC stats for 10.4 variants

Export the final Transmit Power Control (TPC) value, which is the
minimum of control power and existing TPC value to user space via
a new debugfs file "tpc_stats_final" to help with debugging.
It works with the new wmi cmd and event introduced in 10.4 firmware
branch.

WMI command ID: WMI_PDEV_GET_TPC_TABLE_CMDID
WMI event ID: WMI_PDEV_TPC_TABLE_EVENTID

cat /sys/kernel/debug/ieee80211/phyX/ath10k/tpc_stats_final

$ cat /sys/kernel/debug/ieee80211/phyX/ath10k/tpc_stats_final

TPC config for channel 5180 mode 10

CTL             =  0x 0 Reg. Domain             = 58
Antenna Gain    =  0 Reg. Max Antenna Gain      =   0
Power Limit     = 60 Reg. Max Power             = 60
Num tx chains   =  2 Num supported rates        = 109

******************* CDD POWER TABLE ****************

No.  Preamble Rate_code tpc_value1 tpc_value2 tpc_value3
0    CCK      0x40        0          0
1    CCK      0x41        0          0
[...]
107  HTCUP    0x 0       46          46
108  HTCUP    0x 0       46          46

******************* STBC POWER TABLE ****************

No.  Preamble Rate_code tpc_value1 tpc_value2 tpc_value3
0    CCK      0x40        0          0
1    CCK      0x41        0          0
[...]
107  HTCUP    0x 0        46         46
108  HTCUP    0x 0        46         46

***********************************
TXBF not supported
**********************************

The existing tpc_stats debugfs file provides the dump
which is minimum of target power and regulatory domain.

cat /sys/kernel/debug/ieee80211/phyX/ath10k/tpc_stats

Hardware_used: QCA4019
Firmware version: firmware-5.bin_10.4-3.0-00209

Signed-off-by: Maharaja Kennadyrajan <mkenna@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 293 insertions, 15 deletions

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 58dc2189ba49..77c6bc671f32 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2005-2011 Atheros Communications Inc.
  * Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -196,6 +197,7 @@ static struct wmi_cmd_map wmi_cmd_map = {
 	.mu_cal_start_cmdid = WMI_CMD_UNSUPPORTED,
 	.set_cca_params_cmdid = WMI_CMD_UNSUPPORTED,
 	.pdev_bss_chan_info_request_cmdid = WMI_CMD_UNSUPPORTED,
+	.pdev_get_tpc_table_cmdid = WMI_CMD_UNSUPPORTED,
 };
 
 /* 10.X WMI cmd track */
@@ -362,6 +364,7 @@ static struct wmi_cmd_map wmi_10x_cmd_map = {
 	.mu_cal_start_cmdid = WMI_CMD_UNSUPPORTED,
 	.set_cca_params_cmdid = WMI_CMD_UNSUPPORTED,
 	.pdev_bss_chan_info_request_cmdid = WMI_CMD_UNSUPPORTED,
+	.pdev_get_tpc_table_cmdid = WMI_CMD_UNSUPPORTED,
 };
 
 /* 10.2.4 WMI cmd track */
@@ -528,6 +531,7 @@ static struct wmi_cmd_map wmi_10_2_4_cmd_map = {
 	.set_cca_params_cmdid = WMI_CMD_UNSUPPORTED,
 	.pdev_bss_chan_info_request_cmdid =
 		WMI_10_2_PDEV_BSS_CHAN_INFO_REQUEST_CMDID,
+	.pdev_get_tpc_table_cmdid = WMI_CMD_UNSUPPORTED,
 };
 
 /* 10.4 WMI cmd track */
@@ -1480,6 +1484,7 @@ static struct wmi_cmd_map wmi_10_2_cmd_map = {
 	.pdev_get_ani_cck_config_cmdid = WMI_CMD_UNSUPPORTED,
 	.pdev_get_ani_ofdm_config_cmdid = WMI_CMD_UNSUPPORTED,
 	.pdev_reserve_ast_entry_cmdid = WMI_CMD_UNSUPPORTED,
+	.pdev_get_tpc_table_cmdid = WMI_CMD_UNSUPPORTED,
 };
 
 static struct wmi_pdev_param_map wmi_10_4_pdev_param_map = {
@@ -4313,19 +4318,11 @@ static void ath10k_tpc_config_disp_tables(struct ath10k *ar,
 	}
 }
 
-void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
+void ath10k_wmi_tpc_config_get_rate_code(u8 *rate_code, u16 *pream_table,
+					 u32 num_tx_chain)
 {
-	u32 i, j, pream_idx, num_tx_chain;
-	u8 rate_code[WMI_TPC_RATE_MAX], rate_idx;
-	u16 pream_table[WMI_TPC_PREAM_TABLE_MAX];
-	struct wmi_pdev_tpc_config_event *ev;
-	struct ath10k_tpc_stats *tpc_stats;
-
-	ev = (struct wmi_pdev_tpc_config_event *)skb->data;
-
-	tpc_stats = kzalloc(sizeof(*tpc_stats), GFP_ATOMIC);
-	if (!tpc_stats)
-		return;
+	u32 i, j, pream_idx;
+	u8 rate_idx;
 
 	/* Create the rate code table based on the chains supported */
 	rate_idx = 0;
@@ -4349,8 +4346,6 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
 	pream_table[pream_idx] = rate_idx;
 	pream_idx++;
 
-	num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
-
 	/* Fill HT20 rate code */
 	for (i = 0; i < num_tx_chain; i++) {
 		for (j = 0; j < 8; j++) {
@@ -4374,7 +4369,7 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
 	pream_idx++;
 
 	/* Fill VHT20 rate code */
-	for (i = 0; i < __le32_to_cpu(ev->num_tx_chain); i++) {
+	for (i = 0; i < num_tx_chain; i++) {
 		for (j = 0; j < 10; j++) {
 			rate_code[rate_idx] =
 			ATH10K_HW_RATECODE(j, i, WMI_RATE_PREAMBLE_VHT);
@@ -4418,6 +4413,26 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
 		ATH10K_HW_RATECODE(0, 0, WMI_RATE_PREAMBLE_OFDM);
 
 	pream_table[pream_idx] = ATH10K_TPC_PREAM_TABLE_END;
+}
+
+void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
+{
+	u32 num_tx_chain;
+	u8 rate_code[WMI_TPC_RATE_MAX];
+	u16 pream_table[WMI_TPC_PREAM_TABLE_MAX];
+	struct wmi_pdev_tpc_config_event *ev;
+	struct ath10k_tpc_stats *tpc_stats;
+
+	ev = (struct wmi_pdev_tpc_config_event *)skb->data;
+
+	tpc_stats = kzalloc(sizeof(*tpc_stats), GFP_ATOMIC);
+	if (!tpc_stats)
+		return;
+
+	num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
+
+	ath10k_wmi_tpc_config_get_rate_code(rate_code, pream_table,
+					    num_tx_chain);
 
 	tpc_stats->chan_freq = __le32_to_cpu(ev->chan_freq);
 	tpc_stats->phy_mode = __le32_to_cpu(ev->phy_mode);
@@ -4457,6 +4472,246 @@ void ath10k_wmi_event_pdev_tpc_config(struct ath10k *ar, struct sk_buff *skb)
 		   __le32_to_cpu(ev->rate_max));
 }
 
+static u8
+ath10k_wmi_tpc_final_get_rate(struct ath10k *ar,
+			      struct wmi_pdev_tpc_final_table_event *ev,
+			      u32 rate_idx, u32 num_chains,
+			      u32 rate_code, u8 type, u32 pream_idx)
+{
+	u8 tpc, num_streams, preamble, ch, stm_idx;
+	s8 pow_agcdd, pow_agstbc, pow_agtxbf;
+	int pream;
+
+	num_streams = ATH10K_HW_NSS(rate_code);
+	preamble = ATH10K_HW_PREAMBLE(rate_code);
+	ch = num_chains - 1;
+	stm_idx = num_streams - 1;
+	pream = -1;
+
+	if (__le32_to_cpu(ev->chan_freq) <= 2483) {
+		switch (pream_idx) {
+		case WMI_TPC_PREAM_2GHZ_CCK:
+			pream = 0;
+			break;
+		case WMI_TPC_PREAM_2GHZ_OFDM:
+			pream = 1;
+			break;
+		case WMI_TPC_PREAM_2GHZ_HT20:
+		case WMI_TPC_PREAM_2GHZ_VHT20:
+			pream = 2;
+			break;
+		case WMI_TPC_PREAM_2GHZ_HT40:
+		case WMI_TPC_PREAM_2GHZ_VHT40:
+			pream = 3;
+			break;
+		case WMI_TPC_PREAM_2GHZ_VHT80:
+			pream = 4;
+			break;
+		default:
+			pream = -1;
+			break;
+		}
+	}
+
+	if (__le32_to_cpu(ev->chan_freq) >= 5180) {
+		switch (pream_idx) {
+		case WMI_TPC_PREAM_5GHZ_OFDM:
+			pream = 0;
+			break;
+		case WMI_TPC_PREAM_5GHZ_HT20:
+		case WMI_TPC_PREAM_5GHZ_VHT20:
+			pream = 1;
+			break;
+		case WMI_TPC_PREAM_5GHZ_HT40:
+		case WMI_TPC_PREAM_5GHZ_VHT40:
+			pream = 2;
+			break;
+		case WMI_TPC_PREAM_5GHZ_VHT80:
+			pream = 3;
+			break;
+		case WMI_TPC_PREAM_5GHZ_HTCUP:
+			pream = 4;
+			break;
+		default:
+			pream = -1;
+			break;
+		}
+	}
+
+	if (pream == 4)
+		tpc = min_t(u8, ev->rates_array[rate_idx],
+			    ev->max_reg_allow_pow[ch]);
+	else
+		tpc = min_t(u8, min_t(u8, ev->rates_array[rate_idx],
+				      ev->max_reg_allow_pow[ch]),
+			    ev->ctl_power_table[0][pream][stm_idx]);
+
+	if (__le32_to_cpu(ev->num_tx_chain) <= 1)
+		goto out;
+
+	if (preamble == WMI_RATE_PREAMBLE_CCK)
+		goto out;
+
+	if (num_chains <= num_streams)
+		goto out;
+
+	switch (type) {
+	case WMI_TPC_TABLE_TYPE_STBC:
+		pow_agstbc = ev->max_reg_allow_pow_agstbc[ch - 1][stm_idx];
+		if (pream == 4)
+			tpc = min_t(u8, tpc, pow_agstbc);
+		else
+			tpc = min_t(u8, min_t(u8, tpc, pow_agstbc),
+				    ev->ctl_power_table[0][pream][stm_idx]);
+		break;
+	case WMI_TPC_TABLE_TYPE_TXBF:
+		pow_agtxbf = ev->max_reg_allow_pow_agtxbf[ch - 1][stm_idx];
+		if (pream == 4)
+			tpc = min_t(u8, tpc, pow_agtxbf);
+		else
+			tpc = min_t(u8, min_t(u8, tpc, pow_agtxbf),
+				    ev->ctl_power_table[1][pream][stm_idx]);
+		break;
+	case WMI_TPC_TABLE_TYPE_CDD:
+		pow_agcdd = ev->max_reg_allow_pow_agcdd[ch - 1][stm_idx];
+		if (pream == 4)
+			tpc = min_t(u8, tpc, pow_agcdd);
+		else
+			tpc = min_t(u8, min_t(u8, tpc, pow_agcdd),
+				    ev->ctl_power_table[0][pream][stm_idx]);
+		break;
+	default:
+		ath10k_warn(ar, "unknown wmi tpc final table type: %d\n", type);
+		tpc = 0;
+		break;
+	}
+
+out:
+	return tpc;
+}
+
+static void
+ath10k_wmi_tpc_stats_final_disp_tables(struct ath10k *ar,
+				       struct wmi_pdev_tpc_final_table_event *ev,
+				       struct ath10k_tpc_stats_final *tpc_stats,
+				       u8 *rate_code, u16 *pream_table, u8 type)
+{
+	u32 i, j, pream_idx, flags;
+	u8 tpc[WMI_TPC_TX_N_CHAIN];
+	char tpc_value[WMI_TPC_TX_N_CHAIN * WMI_TPC_BUF_SIZE];
+	char buff[WMI_TPC_BUF_SIZE];
+
+	flags = __le32_to_cpu(ev->flags);
+
+	switch (type) {
+	case WMI_TPC_TABLE_TYPE_CDD:
+		if (!(flags & WMI_TPC_CONFIG_EVENT_FLAG_TABLE_CDD)) {
+			ath10k_dbg(ar, ATH10K_DBG_WMI, "CDD not supported\n");
+			tpc_stats->flag[type] = ATH10K_TPC_TABLE_TYPE_FLAG;
+			return;
+		}
+		break;
+	case WMI_TPC_TABLE_TYPE_STBC:
+		if (!(flags & WMI_TPC_CONFIG_EVENT_FLAG_TABLE_STBC)) {
+			ath10k_dbg(ar, ATH10K_DBG_WMI, "STBC not supported\n");
+			tpc_stats->flag[type] = ATH10K_TPC_TABLE_TYPE_FLAG;
+			return;
+		}
+		break;
+	case WMI_TPC_TABLE_TYPE_TXBF:
+		if (!(flags & WMI_TPC_CONFIG_EVENT_FLAG_TABLE_TXBF)) {
+			ath10k_dbg(ar, ATH10K_DBG_WMI, "TXBF not supported\n");
+			tpc_stats->flag[type] = ATH10K_TPC_TABLE_TYPE_FLAG;
+			return;
+		}
+		break;
+	default:
+		ath10k_dbg(ar, ATH10K_DBG_WMI,
+			   "invalid table type in wmi tpc event: %d\n", type);
+		return;
+	}
+
+	pream_idx = 0;
+	for (i = 0; i < __le32_to_cpu(ev->rate_max); i++) {
+		memset(tpc_value, 0, sizeof(tpc_value));
+		memset(buff, 0, sizeof(buff));
+		if (i == pream_table[pream_idx])
+			pream_idx++;
+
+		for (j = 0; j < WMI_TPC_TX_N_CHAIN; j++) {
+			if (j >= __le32_to_cpu(ev->num_tx_chain))
+				break;
+
+			tpc[j] = ath10k_wmi_tpc_final_get_rate(ar, ev, i, j + 1,
+							       rate_code[i],
+							       type, pream_idx);
+			snprintf(buff, sizeof(buff), "%8d ", tpc[j]);
+			strncat(tpc_value, buff, strlen(buff));
+		}
+		tpc_stats->tpc_table_final[type].pream_idx[i] = pream_idx;
+		tpc_stats->tpc_table_final[type].rate_code[i] = rate_code[i];
+		memcpy(tpc_stats->tpc_table_final[type].tpc_value[i],
+		       tpc_value, sizeof(tpc_value));
+	}
+}
+
+void ath10k_wmi_event_tpc_final_table(struct ath10k *ar, struct sk_buff *skb)
+{
+	u32 num_tx_chain;
+	u8 rate_code[WMI_TPC_FINAL_RATE_MAX];
+	u16 pream_table[WMI_TPC_PREAM_TABLE_MAX];
+	struct wmi_pdev_tpc_final_table_event *ev;
+	struct ath10k_tpc_stats_final *tpc_stats;
+
+	ev = (struct wmi_pdev_tpc_final_table_event *)skb->data;
+
+	tpc_stats = kzalloc(sizeof(*tpc_stats), GFP_ATOMIC);
+	if (!tpc_stats)
+		return;
+
+	num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
+
+	ath10k_wmi_tpc_config_get_rate_code(rate_code, pream_table,
+					    num_tx_chain);
+
+	tpc_stats->chan_freq = __le32_to_cpu(ev->chan_freq);
+	tpc_stats->phy_mode = __le32_to_cpu(ev->phy_mode);
+	tpc_stats->ctl = __le32_to_cpu(ev->ctl);
+	tpc_stats->reg_domain = __le32_to_cpu(ev->reg_domain);
+	tpc_stats->twice_antenna_gain = a_sle32_to_cpu(ev->twice_antenna_gain);
+	tpc_stats->twice_antenna_reduction =
+		__le32_to_cpu(ev->twice_antenna_reduction);
+	tpc_stats->power_limit = __le32_to_cpu(ev->power_limit);
+	tpc_stats->twice_max_rd_power = __le32_to_cpu(ev->twice_max_rd_power);
+	tpc_stats->num_tx_chain = __le32_to_cpu(ev->num_tx_chain);
+	tpc_stats->rate_max = __le32_to_cpu(ev->rate_max);
+
+	ath10k_wmi_tpc_stats_final_disp_tables(ar, ev, tpc_stats,
+					       rate_code, pream_table,
+					       WMI_TPC_TABLE_TYPE_CDD);
+	ath10k_wmi_tpc_stats_final_disp_tables(ar, ev,  tpc_stats,
+					       rate_code, pream_table,
+					       WMI_TPC_TABLE_TYPE_STBC);
+	ath10k_wmi_tpc_stats_final_disp_tables(ar, ev, tpc_stats,
+					       rate_code, pream_table,
+					       WMI_TPC_TABLE_TYPE_TXBF);
+
+	ath10k_debug_tpc_stats_final_process(ar, tpc_stats);
+
+	ath10k_dbg(ar, ATH10K_DBG_WMI,
+		   "wmi event tpc final table channel %d mode %d ctl %d regd %d gain %d %d limit %d max_power %d tx_chanins %d rates %d\n",
+		   __le32_to_cpu(ev->chan_freq),
+		   __le32_to_cpu(ev->phy_mode),
+		   __le32_to_cpu(ev->ctl),
+		   __le32_to_cpu(ev->reg_domain),
+		   a_sle32_to_cpu(ev->twice_antenna_gain),
+		   __le32_to_cpu(ev->twice_antenna_reduction),
+		   __le32_to_cpu(ev->power_limit),
+		   __le32_to_cpu(ev->twice_max_rd_power) / 2,
+		   __le32_to_cpu(ev->num_tx_chain),
+		   __le32_to_cpu(ev->rate_max));
+}
+
 static void
 ath10k_wmi_handle_tdls_peer_event(struct ath10k *ar, struct sk_buff *skb)
 {
@@ -5549,6 +5804,9 @@ static void ath10k_wmi_10_4_op_rx(struct ath10k *ar, struct sk_buff *skb)
 	case WMI_10_4_TDLS_PEER_EVENTID:
 		ath10k_wmi_handle_tdls_peer_event(ar, skb);
 		break;
+	case WMI_10_4_PDEV_TPC_TABLE_EVENTID:
+		ath10k_wmi_event_tpc_final_table(ar, skb);
+		break;
 	default:
 		ath10k_warn(ar, "Unknown eventid: %d\n", id);
 		break;
@@ -7990,6 +8248,24 @@ static u32 ath10k_wmi_prepare_peer_qos(u8 uapsd_queues, u8 sp)
 }
 
 static struct sk_buff *
+ath10k_wmi_10_4_op_gen_pdev_get_tpc_table_cmdid(struct ath10k *ar, u32 param)
+{
+	struct wmi_pdev_get_tpc_table_cmd *cmd;
+	struct sk_buff *skb;
+
+	skb = ath10k_wmi_alloc_skb(ar, sizeof(*cmd));
+	if (!skb)
+		return ERR_PTR(-ENOMEM);
+
+	cmd = (struct wmi_pdev_get_tpc_table_cmd *)skb->data;
+	cmd->param = __cpu_to_le32(param);
+
+	ath10k_dbg(ar, ATH10K_DBG_WMI,
+		   "wmi pdev get tpc table param:%d\n", param);
+	return skb;
+}
+
+static struct sk_buff *
 ath10k_wmi_10_4_gen_tdls_peer_update(struct ath10k *ar,
 				     const struct wmi_tdls_peer_update_cmd_arg *arg,
 				     const struct wmi_tdls_peer_capab_arg *cap,
@@ -8430,6 +8706,8 @@ static const struct wmi_ops wmi_10_4_ops = {
 	.ext_resource_config = ath10k_wmi_10_4_ext_resource_config,
 	.gen_update_fw_tdls_state = ath10k_wmi_10_4_gen_update_fw_tdls_state,
 	.gen_tdls_peer_update = ath10k_wmi_10_4_gen_tdls_peer_update,
+	.gen_pdev_get_tpc_table_cmdid =
+			ath10k_wmi_10_4_op_gen_pdev_get_tpc_table_cmdid,
 
 	/* shared with 10.2 */
 	.pull_echo_ev = ath10k_wmi_op_pull_echo_ev,