This is a note to let you know that I've just added the patch titled
wifi: ath10k: Set tx credit to one for WCN3990 snoc based devices
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-ath10k-set-tx-credit-to-one-for-wcn3990-snoc-ba.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f46af31f230371153133c822311ab4d69d8bc1cc
Author: Youghandhar Chintala <quic_youghand@xxxxxxxxxxx>
Date: Mon Aug 1 19:19:41 2022 +0530
wifi: ath10k: Set tx credit to one for WCN3990 snoc based devices
[ Upstream commit d81bbb684c250a637186d9286d75b1cb04d2986c ]
Currently host can send two WMI commands at once. There is possibility to
cause SMMU issues or corruption, if host wants to initiate 2 DMA
transfers, it is possible when copy complete interrupt for first DMA
reaches host, CE has already updated SRRI (Source ring read index) for
both DMA transfers and is in the middle of 2nd DMA. Host uses SRRI
(Source ring read index) to interpret how many DMA’s have been completed
and tries to unmap/free both the DMA entries. Hence now it is limiting to
one.Because CE is still in the middle of 2nd DMA which can cause these
issues when handling two DMA transfers.
This change will not impact other targets, as it is only for WCN3990.
Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1
Signed-off-by: Youghandhar Chintala <quic_youghand@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220801134941.15216-1-quic_youghand@xxxxxxxxxxx
Stable-dep-of: f020d9570a04 ("wifi: ath10k: add peer map clean up for peer delete in ath10k_sta_state()")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 276954b70d63..d1ac64026cb3 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -98,6 +98,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = true,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA988X_HW_2_0_VERSION,
@@ -136,6 +137,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = true,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9887_HW_1_0_VERSION,
@@ -175,6 +177,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA6174_HW_3_2_VERSION,
@@ -209,6 +212,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.supports_peer_stats_info = true,
.dynamic_sar_support = true,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA6174_HW_2_1_VERSION,
@@ -247,6 +251,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA6174_HW_2_1_VERSION,
@@ -285,6 +290,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA6174_HW_3_0_VERSION,
@@ -323,6 +329,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA6174_HW_3_2_VERSION,
@@ -365,6 +372,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.supports_peer_stats_info = true,
.dynamic_sar_support = true,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA99X0_HW_2_0_DEV_VERSION,
@@ -409,6 +417,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9984_HW_1_0_DEV_VERSION,
@@ -460,6 +469,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9888_HW_2_0_DEV_VERSION,
@@ -508,6 +518,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9377_HW_1_0_DEV_VERSION,
@@ -546,6 +557,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9377_HW_1_1_DEV_VERSION,
@@ -586,6 +598,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA9377_HW_1_1_DEV_VERSION,
@@ -617,6 +630,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.credit_size_workaround = true,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = QCA4019_HW_1_0_DEV_VERSION,
@@ -662,6 +676,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = false,
.hw_restart_disconnect = false,
+ .use_fw_tx_credits = true,
},
{
.id = WCN3990_HW_1_0_DEV_VERSION,
@@ -693,6 +708,7 @@ static const struct ath10k_hw_params ath10k_hw_params_list[] = {
.tx_stats_over_pktlog = false,
.dynamic_sar_support = true,
.hw_restart_disconnect = true,
+ .use_fw_tx_credits = false,
},
};
diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c
index fab398046a3f..6d1784f74bea 100644
--- a/drivers/net/wireless/ath/ath10k/htc.c
+++ b/drivers/net/wireless/ath/ath10k/htc.c
@@ -947,13 +947,18 @@ int ath10k_htc_wait_target(struct ath10k_htc *htc)
return -ECOMM;
}
- htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
+ if (ar->hw_params.use_fw_tx_credits)
+ htc->total_transmit_credits = __le16_to_cpu(msg->ready.credit_count);
+ else
+ htc->total_transmit_credits = 1;
+
htc->target_credit_size = __le16_to_cpu(msg->ready.credit_size);
ath10k_dbg(ar, ATH10K_DBG_HTC,
- "Target ready! transmit resources: %d size:%d\n",
+ "Target ready! transmit resources: %d size:%d actual credits:%d\n",
htc->total_transmit_credits,
- htc->target_credit_size);
+ htc->target_credit_size,
+ msg->ready.credit_count);
if ((htc->total_transmit_credits == 0) ||
(htc->target_credit_size == 0)) {
diff --git a/drivers/net/wireless/ath/ath10k/hw.h b/drivers/net/wireless/ath/ath10k/hw.h
index 93acf0dd580a..1b99f3a39a11 100644
--- a/drivers/net/wireless/ath/ath10k/hw.h
+++ b/drivers/net/wireless/ath/ath10k/hw.h
@@ -635,6 +635,8 @@ struct ath10k_hw_params {
bool dynamic_sar_support;
bool hw_restart_disconnect;
+
+ bool use_fw_tx_credits;
};
struct htt_resp;
