[PATCH] ath10k: reduce transmit msdu count

[PATCH] ath10k: reduce transmit msdu count

[Wen Gong]

From: Alagu Sankar <alagusankar@silex-india.com>

Reduce the transmit MSDU count for SDIO, to match with the descriptors
as used by the firmware. This also acts as a high watermark level for
transmit. Too many packets to the firmware results in transmit overflow
interrupt.

It only affect SDIO chip, it will not cause functionaly changes to
other hardware.

Tested with QCA6174 SDIO with firmware
WLAN.RMH.4.4.1-00005-QCARMSWP-1.

Signed-off-by: Alagu Sankar <alagusankar@silex-india.com>
Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 drivers/net/wireless/ath/ath10k/core.c    | 6 +++++-
 drivers/net/wireless/ath/ath10k/hw.h      | 1 +
 drivers/net/wireless/ath/ath10k/wmi-tlv.c | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 22cbe9a..fee4ec1 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -2309,7 +2309,11 @@ static int ath10k_core_init_firmware_features(struct ath10k *ar)
 		ar->max_num_stations = TARGET_TLV_NUM_STATIONS;
 		ar->max_num_vdevs = TARGET_TLV_NUM_VDEVS;
 		ar->max_num_tdls_vdevs = TARGET_TLV_NUM_TDLS_VDEVS;
-		ar->htt.max_num_pending_tx = TARGET_TLV_NUM_MSDU_DESC;
+		if (ar->hif.bus == ATH10K_BUS_SDIO)
+			ar->htt.max_num_pending_tx =
+				TARGET_TLV_NUM_MSDU_DESC_HL;
+		else
+			ar->htt.max_num_pending_tx = TARGET_TLV_NUM_MSDU_DESC;
 		ar->wow.max_num_patterns = TARGET_TLV_NUM_WOW_PATTERNS;
 		ar->fw_stats_req_mask = WMI_STAT_PDEV | WMI_STAT_VDEV |
 			WMI_STAT_PEER;
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 1b5da27..c012523 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -724,6 +724,7 @@ struct ath10k_hw_ops {
 #define TARGET_TLV_NUM_TDLS_VDEVS		1
 #define TARGET_TLV_NUM_TIDS			((TARGET_TLV_NUM_PEERS) * 2)
 #define TARGET_TLV_NUM_MSDU_DESC		(1024 + 32)
+#define TARGET_TLV_NUM_MSDU_DESC_HL		64
 #define TARGET_TLV_NUM_WOW_PATTERNS		22
 #define TARGET_TLV_MGMT_NUM_MSDU_DESC		(50)
 
diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
index ad4114a..35fb852 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
@@ -1611,7 +1611,7 @@ static struct sk_buff *ath10k_wmi_tlv_op_gen_init(struct ath10k *ar)
 	cfg->rx_skip_defrag_timeout_dup_detection_check = __cpu_to_le32(0);
 	cfg->vow_config = __cpu_to_le32(0);
 	cfg->gtk_offload_max_vdev = __cpu_to_le32(2);
-	cfg->num_msdu_desc = __cpu_to_le32(TARGET_TLV_NUM_MSDU_DESC);
+	cfg->num_msdu_desc = __cpu_to_le32(ar->htt.max_num_pending_tx);
 	cfg->max_frag_entries = __cpu_to_le32(2);
 	cfg->num_tdls_vdevs = __cpu_to_le32(TARGET_TLV_NUM_TDLS_VDEVS);
 	cfg->num_tdls_conn_table_entries = __cpu_to_le32(0x20);
-- 
1.9.1

Re: [PATCH] ath10k: reduce transmit msdu count

[Kalle Valo]

Wen Gong <wgong@codeaurora.org> wrote:

> Reduce the transmit MSDU count for SDIO, to match with the descriptors
> as used by the firmware. This also acts as a high watermark level for
> transmit. Too many packets to the firmware results in transmit overflow
> interrupt.
> 
> It only affect SDIO chip, it will not cause functionaly changes to
> other hardware.
> 
> Tested with QCA6174 SDIO with firmware
> WLAN.RMH.4.4.1-00005-QCARMSWP-1.
> 
> Signed-off-by: Alagu Sankar <alagusankar@silex-india.com>
> Signed-off-by: Wen Gong <wgong@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

a73dbce3a6f4 ath10k: reduce transmit msdu count

-- 
https://patchwork.kernel.org/patch/10791705/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches