[PATCH 5.19 085/158] net: ethernet: mtk_eth_soc: fix hw hash reporting for MTK_NETSYS_V2

Greg Kroah-Hartman
2022-08-29T11:31:45Z

From: Lorenzo Bianconi <lorenzo@kernel.org>

[ Upstream commit 0cf731f9ebb5bf6f252055bebf4463a5c0bd490b ]

Properly report hw rx hash for mt7986 chipset accroding to the new dma
descriptor layout.

Fixes: 197c9e9b17b11 ("net: ethernet: mtk_eth_soc: introduce support for mt7986 chipset")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/091394ea4e705fbb35f828011d98d0ba33808f69.1661257293.git.lorenzo@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 22 +++++++++++----------
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 5 +++++
2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 6beb3d4873a37..dcf0aac0aa65d 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1513,10 +1513,19 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
skb->dev = netdev;
skb_put(skb, pktlen);

- if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2))
+ if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
+ hash = trxd.rxd5 & MTK_RXD5_FOE_ENTRY;
+ if (hash != MTK_RXD5_FOE_ENTRY)
+ skb_set_hash(skb, jhash_1word(hash, 0),
+ PKT_HASH_TYPE_L4);
rxdcsum = &trxd.rxd3;
- else
+ } else {
+ hash = trxd.rxd4 & MTK_RXD4_FOE_ENTRY;
+ if (hash != MTK_RXD4_FOE_ENTRY)
+ skb_set_hash(skb, jhash_1word(hash, 0),
+ PKT_HASH_TYPE_L4);
rxdcsum = &trxd.rxd4;
+ }

if (*rxdcsum & eth->soc->txrx.rx_dma_l4_valid)
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -1525,16 +1534,9 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
skb->protocol = eth_type_trans(skb, netdev);
bytes += pktlen;

- hash = trxd.rxd4 & MTK_RXD4_FOE_ENTRY;
- if (hash != MTK_RXD4_FOE_ENTRY) {
- hash = jhash_1word(hash, 0);
- skb_set_hash(skb, hash, PKT_HASH_TYPE_L4);
- }
-
reason = FIELD_GET(MTK_RXD4_PPE_CPU_REASON, trxd.rxd4);
if (reason == MTK_PPE_CPU_REASON_HIT_UNBIND_RATE_REACHED)
- mtk_ppe_check_skb(eth->ppe, skb,
- trxd.rxd4 & MTK_RXD4_FOE_ENTRY);
+ mtk_ppe_check_skb(eth->ppe, skb, hash);

if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 0a632896451a4..98d6a6d047e32 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -307,6 +307,11 @@
#define RX_DMA_L4_VALID_PDMA BIT(30) /* when PDMA is used */
#define RX_DMA_SPECIAL_TAG BIT(22)

+/* PDMA descriptor rxd5 */
+#define MTK_RXD5_FOE_ENTRY GENMASK(14, 0)
+#define MTK_RXD5_PPE_CPU_REASON GENMASK(22, 18)
+#define MTK_RXD5_SRC_PORT GENMASK(29, 26)
+
#define RX_DMA_GET_SPORT(x) (((x) >> 19) & 0xf)
#define RX_DMA_GET_SPORT_V2(x) (((x) >> 26) & 0x7)

--
2.35.1