target/linux/layerscape/patches-5.4/701-net-0291-staging-fsl_ppfe-eth-add-function-to-update-tmu-cred.patch

   1 From cc230f5618174506889f98ac6b79e72ac9d9d9e4 Mon Sep 17 00:00:00 2001
   2 From: Calvin Johnson <calvin.johnson@nxp.com>
   3 Date: Wed, 15 Nov 2017 13:45:27 +0530
   4 Subject: [PATCH] staging: fsl_ppfe/eth: add function to update tmu credits
   5
   6 __hif_lib_update_credit function is used to update the tmu credits.
   7 If tx_qos is set, tmu credit is updated based on the number of packets
   8 transmitted by tmu.
   9
  10 Signed-off-by: Calvin Johnson <calvin.johnson@nxp.com>
  11 Signed-off-by: Anjaneyulu Jagarlmudi <anji.jagarlmudi@nxp.com>
  12 ---
  13  drivers/staging/fsl_ppfe/pfe_hif_lib.c | 33 +++++++++++++++++++++++++++++++++
  14  drivers/staging/fsl_ppfe/pfe_hif_lib.h |  1 +
  15  2 files changed, 34 insertions(+)
  16
  17 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.c
  18 +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.c
  19 @@ -565,6 +565,39 @@ static void hif_lib_tmu_credit_init(stru
  20                 }
  21  }
  22
  23 +/* __hif_lib_update_credit
  24 + *
  25 + * @param[in] client   hif client context
  26 + * @param[in] queue    queue number in match with TMU
  27 + */
  28 +void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue)
  29 +{
  30 +       unsigned int tmu_tx_packets, tmp;
  31 +
  32 +       if (tx_qos) {
  33 +               tmu_tx_packets = be32_to_cpu(pe_dmem_read(TMU0_ID +
  34 +                       client->id, TMU_DM_TX_TRANS, 4));
  35 +
  36 +               /* tx_packets counter overflowed */
  37 +               if (tmu_tx_packets >
  38 +                   pfe->tmu_credit.tx_packets[client->id][queue]) {
  39 +                       tmp = UINT_MAX - tmu_tx_packets +
  40 +                       pfe->tmu_credit.tx_packets[client->id][queue];
  41 +
  42 +                       pfe->tmu_credit.tx_credit[client->id][queue] =
  43 +                       pfe->tmu_credit.tx_credit_max[client->id][queue] - tmp;
  44 +               } else {
  45 +               /* TMU tx <= pfe_eth tx, normal case or both OF since
  46 +                * last time
  47 +                */
  48 +                       pfe->tmu_credit.tx_credit[client->id][queue] =
  49 +                       pfe->tmu_credit.tx_credit_max[client->id][queue] -
  50 +                       (pfe->tmu_credit.tx_packets[client->id][queue] -
  51 +                       tmu_tx_packets);
  52 +               }
  53 +       }
  54 +}
  55 +
  56  int pfe_hif_lib_init(struct pfe *pfe)
  57  {
  58         int rc;
  59 --- a/drivers/staging/fsl_ppfe/pfe_hif_lib.h
  60 +++ b/drivers/staging/fsl_ppfe/pfe_hif_lib.h
  61 @@ -185,6 +185,7 @@ void *hif_lib_tx_get_next_complete(struc
  62  void *hif_lib_receive_pkt(struct hif_client_s *client, int qno, int *len, int
  63                                 *ofst, unsigned int *rx_ctrl,
  64                                 unsigned int *desc_ctrl, void **priv_data);
  65 +void __hif_lib_update_credit(struct hif_client_s *client, unsigned int queue);
  66  void hif_lib_set_rx_cpu_affinity(struct hif_client_s *client, int cpu_id);
  67  void hif_lib_set_tx_queue_nocpy(struct hif_client_s *client, int qno, int
  68                                         enable);