From: Jayesh Choudhary <j-choudhary@xxxxxx>
[ Upstream commit efab25894a41a920d9581183741e7fadba00719c ]
PSIL_EP_NATIVE endpoints may not have PEER registers for BCNT and thus
udma_decrement_byte_counters() should not try to decrement these counters.
This fixes the issue of crypto IPERF testing where the client side (EVM)
hangs without transfer of packets to the server side, seen since this
function was added.
Fixes: 7c94dcfa8fcf ("dmaengine: ti: k3-udma: Reset UDMA_CHAN_RT byte counters to prevent overflow")
Signed-off-by: Jayesh Choudhary <j-choudhary@xxxxxx>
Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx>
Link: https://lore.kernel.org/r/20221128085005.489964-1-j-choudhary@xxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/dma/ti/k3-udma.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 75f2a0006c73..d796e50dfe99 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -760,11 +760,12 @@ static void udma_decrement_byte_counters(struct udma_chan *uc, u32 val)
if (uc->desc->dir == DMA_DEV_TO_MEM) {
udma_rchanrt_write(uc, UDMA_CHAN_RT_BCNT_REG, val);
udma_rchanrt_write(uc, UDMA_CHAN_RT_SBCNT_REG, val);
- udma_rchanrt_write(uc, UDMA_CHAN_RT_PEER_BCNT_REG, val);
+ if (uc->config.ep_type != PSIL_EP_NATIVE)
+ udma_rchanrt_write(uc, UDMA_CHAN_RT_PEER_BCNT_REG, val);
} else {
udma_tchanrt_write(uc, UDMA_CHAN_RT_BCNT_REG, val);
udma_tchanrt_write(uc, UDMA_CHAN_RT_SBCNT_REG, val);
- if (!uc->bchan)
+ if (!uc->bchan && uc->config.ep_type != PSIL_EP_NATIVE)
udma_tchanrt_write(uc, UDMA_CHAN_RT_PEER_BCNT_REG, val);
}
}
--
2.39.0
