diff options
| author | Calvin Johnson <calvin.johnson@nxp.com> | 2017-11-15 08:15:27 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-12-12 07:32:44 (GMT) |
| commit | 076847db329b5f61a0698880da894d4479df9416 (patch) | |
| tree | a967832cb86bf8b918cf5b12df7fe690bac18a8e | |
| parent | e42459af7848b7b9bfcb65714702e84b751e7043 (diff) | |
| download | linux-076847db329b5f61a0698880da894d4479df9416.tar.xz | |
staging: fsl_ppfe/eth: add function to update tmu credits
__hif_lib_update_credit function is used to update the tmu credits.
If tx_qos is set, tmu credit is updated based on the number of packets
transmitted by tmu.
Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
Signed-off-by: Anjaneyulu Jagarlmudi <anji.jagarlmudi@nxp.com>
| -rw-r--r-- | drivers/staging/fsl_ppfe/pfe_hif_lib.c | 33 | ||||
| -rw-r--r-- | drivers/staging/fsl_ppfe/pfe_hif_lib.h | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/staging/fsl_ppfe/pfe_hif_lib.c b/drivers/staging/fsl_ppfe/pfe_hif_lib.c index 837eaa2..2ec47bf 100644 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.c +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.c @@ -565,6 +565,39 @@ static void hif_lib_tmu_credit_init(struct pfe *pfe) } } +/* __hif_lib_update_credit + * + * @param[in] client hif client context + * @param[in] queue queue number in match with TMU + */ +void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue) +{ + unsigned int tmu_tx_packets, tmp; + + if (tx_qos) { + tmu_tx_packets = be32_to_cpu(pe_dmem_read(TMU0_ID + + client->id, TMU_DM_TX_TRANS, 4)); + + /* tx_packets counter overflowed */ + if (tmu_tx_packets > + pfe->tmu_credit.tx_packets[client->id][queue]) { + tmp = UINT_MAX - tmu_tx_packets + + pfe->tmu_credit.tx_packets[client->id][queue]; + + pfe->tmu_credit.tx_credit[client->id][queue] = + pfe->tmu_credit.tx_credit_max[client->id][queue] - tmp; + } else { + /* TMU tx <= pfe_eth tx, normal case or both OF since + * last time + */ + pfe->tmu_credit.tx_credit[client->id][queue] = + pfe->tmu_credit.tx_credit_max[client->id][queue] - + (pfe->tmu_credit.tx_packets[client->id][queue] - + tmu_tx_packets); + } + } +} + int pfe_hif_lib_init(struct pfe *pfe) { int rc; diff --git a/drivers/staging/fsl_ppfe/pfe_hif_lib.h b/drivers/staging/fsl_ppfe/pfe_hif_lib.h index 49e7b5f..d48eb14 100644 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.h +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.h @@ -185,6 +185,7 @@ void *hif_lib_tx_get_next_complete(struct hif_client_s *client, int qno, void *hif_lib_receive_pkt(struct hif_client_s *client, int qno, int *len, int *ofst, unsigned int *rx_ctrl, unsigned int *desc_ctrl, void **priv_data); +void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue); void hif_lib_set_rx_cpu_affinity(struct hif_client_s *client, int cpu_id); void hif_lib_set_tx_queue_nocpy(struct hif_client_s *client, int qno, int enable); |