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net: airoha: Wait for NPU PPE configuration to complete in airoha_ppe_offload_setup()

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In order to properly enable flowtable hw offloading, poll
REG_PPE_FLOW_CFG register in airoha_ppe_offload_setup routine and
wait for NPU PPE configuration triggered by ppe_init callback to complete
before running airoha_ppe_hw_init().

Fixes: 00a7678310 ("net: airoha: Introduce flowtable offload support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260414-airoha-wait-for-npu-config-offload-setup-v2-1-5a9bf6d43aee@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2026-04-14 16:08:52 +02:00 committed by Jakub Kicinski
parent 52bcb57a4e
commit f3206328bb
1 changed files with 28 additions and 0 deletions
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28
drivers/net/ethernet/airoha/airoha_ppe.c
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@ -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,