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net: fec: add eee mode tx lpi support

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The i.MX8MQ ENET version support IEEE802.3az eee mode, add
eee mode tx lpi enable to support ethtool interface.

usage:
1. set sleep and wake timer to 5ms:
ethtool --set-eee eth0 eee on tx-lpi on tx-timer 5000
2. check the eee mode:
~# ethtool --show-eee eth0
EEE Settings for eth0:
        EEE status: enabled - active
        Tx LPI: 5000 (us)
        Supported EEE link modes:  100baseT/Full
                                   1000baseT/Full
        Advertised EEE link modes:  100baseT/Full
                                    1000baseT/Full
        Link partner advertised EEE link modes:  100baseT/Full

Note: For realtime case and IEEE1588 ptp case, it should disable
EEE mode.

Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fugang Duan
2021-07-28 19:52:00 +08:00
committed by David S. Miller
parent 947240ebcc
commit b82f8c3f14
2 changed files with 95 additions and 0 deletions
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6
drivers/net/ethernet/freescale/fec.h
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@@ -77,6 +77,8 @@
#define FEC_R_DES_ACTIVE_2 0x1e8 /* Rx descriptor active for ring 2 */
#define FEC_X_DES_ACTIVE_2 0x1ec /* Tx descriptor active for ring 2 */
#define FEC_QOS_SCHEME 0x1f0 /* Set multi queues Qos scheme */
#define FEC_LPI_SLEEP 0x1f4 /* Set IEEE802.3az LPI Sleep Ts time */
#define FEC_LPI_WAKE 0x1f8 /* Set IEEE802.3az LPI Wake Tw time */
#define FEC_MIIGSK_CFGR 0x300 /* MIIGSK Configuration reg */
#define FEC_MIIGSK_ENR 0x308 /* MIIGSK Enable reg */
@@ -602,6 +604,10 @@ struct fec_enet_private {
unsigned int tx_time_itr;
unsigned int itr_clk_rate;
/* tx lpi eee mode */
struct ethtool_eee eee;
unsigned int clk_ref_rate;
u32 rx_copybreak;
/* ptp clock period in ns*/