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net: stmmac: dwmac4: Report DCB feature capability

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Bit 16 of the MAC HW Feature1 register reports the DCB (Data Centre
Bridging) feature. Read it so that dma_cap.dcben and the debugfs
report it accurately. Right now it is always reported as being disabled.

Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260603173644.24371-1-ovidiu.panait.rb@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ovidiu Panait 2026-06-03 17:36:43 +00:00 committed by Jakub Kicinski
parent a762fabd7e
commit 3a58a1b8d5
2 changed files with 2 additions and 0 deletions
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1
drivers/net/ethernet/stmicro/stmmac/dwmac4.h
View File

@ -198,6 +198,7 @@ enum power_event {
#define GMAC_HW_FEAT_AVSEL BIT(20)
#define GMAC_HW_TSOEN BIT(18)
#define GMAC_HW_FEAT_SPHEN BIT(17)
#define GMAC_HW_FEAT_DCBEN BIT(16)
#define GMAC_HW_ADDR64 GENMASK(15, 14)
#define GMAC_HW_TXFIFOSIZE GENMASK(10, 6)
#define GMAC_HW_RXFIFOSIZE GENMASK(4, 0)

1
drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
View File

@ -391,6 +391,7 @@ static int dwmac4_get_hw_feature(void __iomem *ioaddr,
dma_cap->av = (hw_cap & GMAC_HW_FEAT_AVSEL) >> 20;
dma_cap->tsoen = (hw_cap & GMAC_HW_TSOEN) >> 18;
dma_cap->sphen = (hw_cap & GMAC_HW_FEAT_SPHEN) >> 17;
dma_cap->dcben = (hw_cap & GMAC_HW_FEAT_DCBEN) >> 16;
dma_cap->addr64 = (hw_cap & GMAC_HW_ADDR64) >> 14;
switch (dma_cap->addr64) {