diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c index 03115c1c1063..859818676b69 100644 --- a/drivers/net/ethernet/airoha/airoha_ppe.c +++ b/drivers/net/ethernet/airoha/airoha_ppe.c @@ -1356,6 +1356,29 @@ static struct airoha_npu *airoha_ppe_npu_get(struct airoha_eth *eth) return npu; } +static int airoha_ppe_wait_for_npu_init(struct airoha_eth *eth) +{ + int err; + u32 val; + + /* PPE_FLOW_CFG default register value is 0. Since we reset FE + * during the device probe we can just check the configured value + * is not 0 here. + */ + err = read_poll_timeout(airoha_fe_rr, val, val, USEC_PER_MSEC, + 100 * USEC_PER_MSEC, false, eth, + REG_PPE_PPE_FLOW_CFG(0)); + if (err) + return err; + + if (airoha_ppe_is_enabled(eth, 1)) + err = read_poll_timeout(airoha_fe_rr, val, val, USEC_PER_MSEC, + 100 * USEC_PER_MSEC, false, eth, + REG_PPE_PPE_FLOW_CFG(1)); + + return err; +} + static int airoha_ppe_offload_setup(struct airoha_eth *eth) { struct airoha_npu *npu = airoha_ppe_npu_get(eth); @@ -1369,6 +1392,11 @@ static int airoha_ppe_offload_setup(struct airoha_eth *eth) if (err) goto error_npu_put; + /* Wait for NPU PPE configuration to complete */ + err = airoha_ppe_wait_for_npu_init(eth); + if (err) + goto error_npu_put; + ppe_num_stats_entries = airoha_ppe_get_total_num_stats_entries(ppe); if (ppe_num_stats_entries > 0) { err = npu->ops.ppe_init_stats(npu, ppe->foe_stats_dma,