[PATCH net-next 07/13] net: enetc: offload per-tc max SDU from tc-taprio

Vladimir Oltean
2022-09-14T15:35:05Z

The driver currently sets the PTCMSDUR register statically to the max
MTU supported by the interface. Keep this logic if tc-taprio is absent
or if the max_sdu for a traffic class is 0, and follow the requested max
SDU size otherwise.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
drivers/net/ethernet/freescale/enetc/enetc.h | 3 +++
.../net/ethernet/freescale/enetc/enetc_pf.c | 25 ++++++++++++++++---
.../net/ethernet/freescale/enetc/enetc_qos.c | 10 +++++---
3 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h
index f4cf12c743fe..4d0bdfef51b7 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc.h
@@ -455,6 +455,9 @@ static inline void enetc_cbd_free_data_mem(struct enetc_si *si, int size,
data, *dma);
}

+void enetc_reset_ptcmsdur(struct enetc_hw *hw);
+void enetc_set_ptcmsdur(struct enetc_hw *hw, u32 *queue_max_sdu);
+
#ifdef CONFIG_FSL_ENETC_QOS
int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data);
void enetc_sched_speed_set(struct enetc_ndev_priv *priv, int speed);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf.c b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
index c4a0e836d4f0..03275846f416 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf.c
@@ -516,15 +516,34 @@ static void enetc_port_si_configure(struct enetc_si *si)
enetc_port_wr(hw, ENETC_PSIVLANFMR, ENETC_PSIVLANFMR_VS);
}

-static void enetc_configure_port_mac(struct enetc_hw *hw)
+void enetc_set_ptcmsdur(struct enetc_hw *hw, u32 *max_sdu)
{
int tc;

- enetc_port_wr(hw, ENETC_PM0_MAXFRM,
- ENETC_SET_MAXFRM(ENETC_RX_MAXFRM_SIZE));
+ for (tc = 0; tc < 8; tc++) {
+ u32 val = ENETC_MAC_MAXFRM_SIZE;
+
+ if (max_sdu[tc])
+ val = max_sdu[tc] + VLAN_ETH_HLEN;
+
+ enetc_port_wr(hw, ENETC_PTCMSDUR(tc), val);
+ }
+}
+
+void enetc_reset_ptcmsdur(struct enetc_hw *hw)
+{
+ int tc;

for (tc = 0; tc < 8; tc++)
enetc_port_wr(hw, ENETC_PTCMSDUR(tc), ENETC_MAC_MAXFRM_SIZE);
+}
+
+static void enetc_configure_port_mac(struct enetc_hw *hw)
+{
+ enetc_port_wr(hw, ENETC_PM0_MAXFRM,
+ ENETC_SET_MAXFRM(ENETC_RX_MAXFRM_SIZE));
+
+ enetc_reset_ptcmsdur(hw);

enetc_port_wr(hw, ENETC_PM0_CMD_CFG, ENETC_PM0_CMD_PHY_TX_EN |
ENETC_PM0_CMD_TXP | ENETC_PM0_PROMISC);
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_qos.c b/drivers/net/ethernet/freescale/enetc/enetc_qos.c
index 29be8a1ecee1..a412f27bc4a4 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_qos.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_qos.c
@@ -68,6 +68,7 @@ static int enetc_setup_taprio(struct net_device *ndev,
tge = enetc_rd(hw, ENETC_QBV_PTGCR_OFFSET);
if (!admin_conf->enable) {
enetc_wr(hw, ENETC_QBV_PTGCR_OFFSET, tge & ~ENETC_QBV_TGE);
+ enetc_reset_ptcmsdur(hw);

priv->active_offloads &= ~ENETC_F_QBV;

@@ -123,10 +124,13 @@ static int enetc_setup_taprio(struct net_device *ndev,

enetc_cbd_free_data_mem(priv->si, data_size, tmp, &dma);

- if (!err)
- priv->active_offloads |= ENETC_F_QBV;
+ if (err)
+ return err;

- return err;
+ enetc_set_ptcmsdur(hw, admin_conf->max_sdu);
+ priv->active_offloads |= ENETC_F_QBV;
+
+ return 0;
}

int enetc_setup_tc_taprio(struct net_device *ndev, void *type_data)
--
2.34.1