* [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
@ 2026-06-04 8:30 muhammad.nazim.amirul.nazle.asmade
2026-06-04 19:05 ` Jacob Keller
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: muhammad.nazim.amirul.nazle.asmade @ 2026-06-04 8:30 UTC (permalink / raw)
To: netdev
Cc: andrew+netdev, davem, edumazet, kuba, pabeni, mcoquelin.stm32,
alexandre.torgue, rmk+kernel, maxime.chevallier, linux-stm32,
linux-arm-kernel, linux-kernel
From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
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>
---
drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 2 ++
drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 6 ++++++
2 files changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
index 51943705a2b0..95fdf3133208 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
@@ -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)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
index b5f200a87484..6719ac6e395b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
@@ -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;
}
--
2.43.7
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
2026-06-04 8:30 [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats muhammad.nazim.amirul.nazle.asmade
@ 2026-06-04 19:05 ` Jacob Keller
2026-06-04 19:30 ` Andrew Lunn
2026-06-05 14:55 ` Maxime Chevallier
2 siblings, 0 replies; 6+ messages in thread
From: Jacob Keller @ 2026-06-04 19:05 UTC (permalink / raw)
To: muhammad.nazim.amirul.nazle.asmade, netdev
Cc: andrew+netdev, davem, edumazet, kuba, pabeni, mcoquelin.stm32,
alexandre.torgue, rmk+kernel, maxime.chevallier, linux-stm32,
linux-arm-kernel, linux-kernel
On 6/4/2026 1:30 AM, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
>
> 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>
> ---
> drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 2 ++
> drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 6 ++++++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> index 51943705a2b0..95fdf3133208 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> @@ -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)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> index b5f200a87484..6719ac6e395b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> @@ -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;
> }
>
Right. The l3_filter_match and l4_filter_match already get reported in
stmmac_ethtool.c
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
2026-06-04 8:30 [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats muhammad.nazim.amirul.nazle.asmade
2026-06-04 19:05 ` Jacob Keller
@ 2026-06-04 19:30 ` Andrew Lunn
2026-06-05 2:04 ` Nazle Asmade, Muhammad Nazim Amirul
2026-06-05 14:55 ` Maxime Chevallier
2 siblings, 1 reply; 6+ messages in thread
From: Andrew Lunn @ 2026-06-04 19:30 UTC (permalink / raw)
To: muhammad.nazim.amirul.nazle.asmade
Cc: netdev, andrew+netdev, davem, edumazet, kuba, pabeni,
mcoquelin.stm32, alexandre.torgue, rmk+kernel, maxime.chevallier,
linux-stm32, linux-arm-kernel, linux-kernel
On Thu, Jun 04, 2026 at 01:30:37AM -0700, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
>
> 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.
Are there any more bits which are missing?
dwmac4 has RDES2_L3_L4_FILT_NB_MATCH_MASK for example.
Andrew
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
2026-06-04 19:30 ` Andrew Lunn
@ 2026-06-05 2:04 ` Nazle Asmade, Muhammad Nazim Amirul
2026-06-05 14:04 ` Andrew Lunn
0 siblings, 1 reply; 6+ messages in thread
From: Nazle Asmade, Muhammad Nazim Amirul @ 2026-06-05 2:04 UTC (permalink / raw)
To: Andrew Lunn
Cc: netdev@vger.kernel.org, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, mcoquelin.stm32@gmail.com,
alexandre.torgue@foss.st.com, rmk+kernel@armlinux.org.uk,
maxime.chevallier@bootlin.com,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
On 5/6/2026 3:30 am, Andrew Lunn wrote:
> On Thu, Jun 04, 2026 at 01:30:37AM -0700, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
>> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
>>
>> 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.
>
> Are there any more bits which are missing?
>
> dwmac4 has RDES2_L3_L4_FILT_NB_MATCH_MASK for example.
>
> Andrew
Hi Jakub, Andrew
Thanks for the review!
To reply on Andrew question - As per what I'm seeing, the XGMAC2 RDES2
only defines L3FM (bit 27) and L4FM (bit 28) — there is no FILT_NB_MATCH
equivalent in the XGMAC2 descriptor layout, unlike dwmac4 which exposes
it via RDES2 bits [27:26]. This patch covers all filter match bits
available in XGMAC2 RDES2.
BR,
Nazim
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
2026-06-05 2:04 ` Nazle Asmade, Muhammad Nazim Amirul
@ 2026-06-05 14:04 ` Andrew Lunn
0 siblings, 0 replies; 6+ messages in thread
From: Andrew Lunn @ 2026-06-05 14:04 UTC (permalink / raw)
To: Nazle Asmade, Muhammad Nazim Amirul
Cc: netdev@vger.kernel.org, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, mcoquelin.stm32@gmail.com,
alexandre.torgue@foss.st.com, rmk+kernel@armlinux.org.uk,
maxime.chevallier@bootlin.com,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
> To reply on Andrew question - As per what I'm seeing, the XGMAC2 RDES2
> only defines L3FM (bit 27) and L4FM (bit 28) — there is no FILT_NB_MATCH
> equivalent in the XGMAC2 descriptor layout, unlike dwmac4 which exposes
> it via RDES2 bits [27:26]. This patch covers all filter match bits
> available in XGMAC2 RDES2.
Thanks for the information.
Andrew
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats
2026-06-04 8:30 [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats muhammad.nazim.amirul.nazle.asmade
2026-06-04 19:05 ` Jacob Keller
2026-06-04 19:30 ` Andrew Lunn
@ 2026-06-05 14:55 ` Maxime Chevallier
2 siblings, 0 replies; 6+ messages in thread
From: Maxime Chevallier @ 2026-06-05 14:55 UTC (permalink / raw)
To: muhammad.nazim.amirul.nazle.asmade, netdev
Cc: andrew+netdev, davem, edumazet, kuba, pabeni, mcoquelin.stm32,
alexandre.torgue, rmk+kernel, linux-stm32, linux-arm-kernel,
linux-kernel
Hi,
You're missing the 'net-next' in the Patch subject :(
Besides that,
On 6/4/26 10:30, muhammad.nazim.amirul.nazle.asmade@altera.com wrote:
> From: Nazim Amirul <muhammad.nazim.amirul.nazle.asmade@altera.com>
>
> 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: Maxime Chevallier <maxime.chevallier@bootlin.com>
Maxime
> ---
> drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 2 ++
> drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c | 6 ++++++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> index 51943705a2b0..95fdf3133208 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> @@ -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)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> index b5f200a87484..6719ac6e395b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_descs.c
> @@ -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;
> }
>
^ permalink raw reply [flat|nested] 6+ messages in thread
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Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2026-06-04 8:30 [PATCH] net: stmmac: xgmac: report L3/L4 filter match count in ethtool stats muhammad.nazim.amirul.nazle.asmade
2026-06-04 19:05 ` Jacob Keller
2026-06-04 19:30 ` Andrew Lunn
2026-06-05 2:04 ` Nazle Asmade, Muhammad Nazim Amirul
2026-06-05 14:04 ` Andrew Lunn
2026-06-05 14:55 ` Maxime Chevallier
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