diff options
| author | Kavi Akhila-B46177 <akhila.kavi@nxp.com> | 2017-11-02 06:35:35 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-12-12 07:32:44 (GMT) |
| commit | 5fe8cfe356d2dbf6f9d7e213614d6be9ad0ac592 (patch) | |
| tree | ded94d4637697909a71446ddb9efa42df2af2ab8 /drivers/staging/fsl_ppfe/pfe_hif_lib.c | |
| parent | 076847db329b5f61a0698880da894d4479df9416 (diff) | |
| download | linux-5fe8cfe356d2dbf6f9d7e213614d6be9ad0ac592.tar.xz | |
staging: fsl_ppfe/eth: Avoid packet drop at TMU queues
Added flow control between TMU queues and PFE Linux driver,
based on TMU credits availability.
Added tx_qos module parameter to control this behavior.
Use queue-0 as default queue to transmit packets.
Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
Signed-off-by: Akhila Kavi <akhila.kavi@nxp.com>
Signed-off-by: Anjaneyulu Jagarlmudi <anji.jagarlmudi@nxp.com>
Diffstat (limited to 'drivers/staging/fsl_ppfe/pfe_hif_lib.c')
| -rw-r--r-- | drivers/staging/fsl_ppfe/pfe_hif_lib.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/fsl_ppfe/pfe_hif_lib.c b/drivers/staging/fsl_ppfe/pfe_hif_lib.c index 2ec47bf..eeab4ff 100644 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.c +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.c @@ -34,7 +34,10 @@ unsigned int lro_mode; unsigned int page_mode; -unsigned int tx_qos; +unsigned int tx_qos = 1; +module_param(tx_qos, uint, 0444); +MODULE_PARM_DESC(tx_qos, "0: disable ,\n" + "1: enable (default), guarantee no packet drop at TMU level\n"); unsigned int pfe_pkt_size; unsigned int pfe_pkt_headroom; unsigned int emac_txq_cnt; @@ -576,7 +579,7 @@ void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue) if (tx_qos) { tmu_tx_packets = be32_to_cpu(pe_dmem_read(TMU0_ID + - client->id, TMU_DM_TX_TRANS, 4)); + client->id, (TMU_DM_TX_TRANS + (queue * 4)), 4)); /* tx_packets counter overflowed */ if (tmu_tx_packets > |