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wifi: ath10k: Set tx credit to one for WCN3990 snoc based devices 

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@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220801134941.15216-1-quic_youghand@quicinc.com
This commit is contained in:
Youghandhar Chintala 2022-08-01 19:19:41 +05:30 committed by Kalle Valo
parent 63757225a9
commit d81bbb684c
3 changed files with 26 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/wireless/ath/ath10k/core.c
View File

@ -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,
},
};

11
drivers/net/wireless/ath/ath10k/htc.c
View File

@ -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)) {

2
drivers/net/wireless/ath/ath10k/hw.h
View File

@ -635,6 +635,8 @@ struct ath10k_hw_params {
bool dynamic_sar_support;
bool hw_restart_disconnect;
bool use_fw_tx_credits;
};
struct htt_resp;