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net: enetc: detect frame preemption hardware capability

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Similar to other TSN features, query the Station Interface capability
register to see whether preemption is supported on this port or not.
On LS1028A, preemption is available on ports 0 and 2, but not on 1
and 3.

This will allow us in the future to write the pMAC registers only on the
ENETC ports where a pMAC actually exists.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2023-01-19 18:04:27 +02:00 committed by David S. Miller
parent e3972399bb
commit 94557a9a73
3 changed files with 8 additions and 3 deletions
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3
drivers/net/ethernet/freescale/enetc/enetc.c
View File

@ -1713,6 +1713,9 @@ void enetc_get_si_caps(struct enetc_si *si)
if (val & ENETC_SIPCAPR0_QBV)
si->hw_features |= ENETC_SI_F_QBV;
if (val & ENETC_SIPCAPR0_QBU)
si->hw_features |= ENETC_SI_F_QBU;
if (val & ENETC_SIPCAPR0_PSFP)
si->hw_features |= ENETC_SI_F_PSFP;
}

5
drivers/net/ethernet/freescale/enetc/enetc.h
View File

@ -229,8 +229,9 @@ enum enetc_errata {
ENETC_ERR_UCMCSWP = BIT(1),
};
#define ENETC_SI_F_QBV BIT(0)
#define ENETC_SI_F_PSFP BIT(1)
#define ENETC_SI_F_PSFP BIT(0)
#define ENETC_SI_F_QBV BIT(1)
#define ENETC_SI_F_QBU BIT(2)
/* PCI IEP device data */
struct enetc_si {

3
drivers/net/ethernet/freescale/enetc/enetc_hw.h
View File

@ -18,9 +18,10 @@
#define ENETC_SICTR0 0x18
#define ENETC_SICTR1 0x1c
#define ENETC_SIPCAPR0 0x20
#define ENETC_SIPCAPR0_QBV BIT(4)
#define ENETC_SIPCAPR0_PSFP BIT(9)
#define ENETC_SIPCAPR0_RSS BIT(8)
#define ENETC_SIPCAPR0_QBV BIT(4)
#define ENETC_SIPCAPR0_QBU BIT(3)
#define ENETC_SIPCAPR1 0x24
#define ENETC_SITGTGR 0x30
#define ENETC_SIRBGCR 0x38