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net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats

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Read the L3FM and L4FM bits from the RX descriptor status word (RDES2)
and increment the corresponding ethtool statistics counters. This allows
users to observe L3/L4 filter hit rates via ethtool -S.

Signed-off-by: Rohan G Thomas <rohan.g.thomas@altera.com>
Signed-off-by: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260604083037.24407-1-muhammad.nazim.amirul.nazle.asmade@altera.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nazim Amirul
2026-06-04 01:30:37 -07:00
committed by Jakub Kicinski
parent 46e5036733
commit 903db046d5
2 changed files with 8 additions and 0 deletions
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2
drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
View File

@@ -429,6 +429,8 @@
#define XGMAC_TDES3_VLTV BIT(16)
#define XGMAC_TDES3_VT GENMASK(15, 0)
#define XGMAC_TDES3_FL GENMASK(14, 0)
#define XGMAC_RDES2_L4FM BIT(28)
#define XGMAC_RDES2_L3FM BIT(27)
#define XGMAC_RDES2_HL GENMASK(9, 0)
#define XGMAC_RDES3_OWN BIT(31)
#define XGMAC_RDES3_CTXT BIT(30)

6
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
View File

@@ -27,6 +27,7 @@ static int dwxgmac2_get_rx_status(struct stmmac_extra_stats *x,
struct dma_desc *p)
{
u32 rdes3 = le32_to_cpu(p->des3);
u32 rdes2 = le32_to_cpu(p->des2);
if (unlikely(rdes3 & XGMAC_RDES3_OWN))
return dma_own;
@@ -37,6 +38,11 @@ static int dwxgmac2_get_rx_status(struct stmmac_extra_stats *x,
if (unlikely((rdes3 & XGMAC_RDES3_ES) && (rdes3 & XGMAC_RDES3_LD)))
return discard_frame;
if (rdes2 & XGMAC_RDES2_L3FM)
x->l3_filter_match++;
if (rdes2 & XGMAC_RDES2_L4FM)
x->l4_filter_match++;
return good_frame;
}