[][kernel][mt7988][eth][fix TDMA Tx monitor]
[Description]
Fix TDMA Tx monitor.
The original TDMA Tx monitor only checks DMA FSM and status.
While this may report some false alarm since DMA might be busy with the
same FSM for a long time.
To mitigate this false alarm, check PSE IQ count is changing or not.
If PSE IQ count and DMA FSM is always the same, it should be DMA hang.
[Release-log]
N/A
Change-Id: I7e55df44fa83f35b0cabfc6ad33a17c67125b319
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7711017
diff --git a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_reset.c b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_reset.c
index e137bda..1042685 100644
--- a/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_reset.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_reset.c
@@ -431,22 +431,29 @@
u32 mtk_monitor_tdma_tx(struct mtk_eth *eth)
{
static u32 err_cnt_ttx;
+ static u32 pre_ipq10;
static u32 pre_fsm;
u32 err_flag = 0;
u32 cur_fsm = 0;
u32 tx_busy = 0;
+ u32 ipq10;
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+ ipq10 = mtk_r32(eth, MTK_PSE_IQ_STA(6)) & 0xFFF;
cur_fsm = (mtk_r32(eth, MTK_FE_CDM6_FSM) & 0x1FFF) != 0;
tx_busy = ((mtk_r32(eth, MTK_TDMA_GLO_CFG) & 0x2) != 0);
- if (cur_fsm == pre_fsm && cur_fsm != 0 && tx_busy) {
+ if (ipq10 && cur_fsm && tx_busy
+ && cur_fsm == pre_fsm
+ && ipq10 == pre_ipq10) {
err_cnt_ttx++;
if (err_cnt_ttx >= 3) {
pr_info("TDMA Tx Info\n");
pr_info("err_cnt = %d", err_cnt_ttx);
- pr_info("CDM6_FSM = %d\n",
- mtk_r32(eth, MTK_FE_CDM6_FSM));
+ pr_info("CDM6_FSM = 0x%x, PRE_CDM6_FSM = 0x%x\n",
+ mtk_r32(eth, MTK_FE_CDM6_FSM), pre_fsm);
+ pr_info("PSE_IQ_P10 = 0x%x, PRE_PSE_IQ_P10 = 0x%x\n",
+ mtk_r32(eth, MTK_PSE_IQ_STA(6)), pre_ipq10);
pr_info("DMA CFG = 0x%x\n",
mtk_r32(eth, MTK_TDMA_GLO_CFG));
pr_info("==============================\n");
@@ -456,6 +463,7 @@
err_cnt_ttx = 0;
pre_fsm = cur_fsm;
+ pre_ipq10 = ipq10;
}
if (err_flag)