target/linux/layerscape/patches-5.4/701-net-0042-sdk_dpaa-ceetm-add-independent-CEETM-congestion-thre.patch

   1 From aa54d82b06962bb620852ed20270f7783be68897 Mon Sep 17 00:00:00 2001
   2 From: Camelia Groza <camelia.groza@nxp.com>
   3 Date: Fri, 24 Nov 2017 10:29:12 +0200
   4 Subject: [PATCH] sdk_dpaa: ceetm: add independent CEETM congestion thresholds
   5
   6 Configure the CEETM egress congestion thresholds independently from the
   7 default Ethernet driver's Work Queues. Allow the user to edit the
   8 thresholds through menuconfig.
   9
  10 Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
  11 ---
  12  drivers/net/ethernet/freescale/sdk_dpaa/Kconfig    | 23 ++++++++++++++++++++++
  13  .../ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c   |  4 ++--
  14  2 files changed, 25 insertions(+), 2 deletions(-)
  15
  16 --- a/drivers/net/ethernet/freescale/sdk_dpaa/Kconfig
  17 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/Kconfig
  18 @@ -20,6 +20,29 @@ config FSL_DPAA_CEETM
  19         help
  20         Enable QoS offloading support through the CEETM hardware block.
  21
  22 +config FSL_DPAA_CEETM_CCS_THRESHOLD_1G
  23 +       hex "CEETM egress congestion threshold on 1G ports"
  24 +       depends on FSL_DPAA_CEETM
  25 +       range 0x1000 0x10000000
  26 +       default "0x000a0000"
  27 +       help
  28 +         The size in bytes of the CEETM egress Class Congestion State threshold on 1G ports.
  29 +         The threshold needs to be configured keeping in mind the following factors:
  30 +              - A threshold too large will buffer frames for a long time in the TX queues,
  31 +              when a small shaping rate is configured. This will cause buffer pool depletion
  32 +              or out of memory errors. This in turn will cause frame loss on RX;
  33 +              - A threshold too small will cause unnecessary frame loss by entering
  34 +              congestion too often.
  35 +
  36 +config FSL_DPAA_CEETM_CCS_THRESHOLD_10G
  37 +       hex "CEETM egress congestion threshold on 10G ports"
  38 +       depends on FSL_DPAA_CEETM
  39 +       range 0x1000 0x20000000
  40 +       default "0x00640000"
  41 +       help
  42 +         The size in bytes of the CEETM egress Class Congestion State threshold on 10G ports.
  43 +         See FSL_DPAA_CEETM_CCS_THRESHOLD_1G for details.
  44 +
  45  config FSL_DPAA_OFFLINE_PORTS
  46         bool "Offline Ports support"
  47         depends on FSL_SDK_DPAA_ETH
  48 --- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
  49 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
  50 @@ -185,9 +185,9 @@ static int ceetm_config_ccg(struct qm_ce
  51
  52         /* Set the congestion state thresholds according to the link speed */
  53         if (dpa_priv->mac_dev->if_support & SUPPORTED_10000baseT_Full)
  54 -               cs_th = CONFIG_FSL_DPAA_CS_THRESHOLD_10G;
  55 +               cs_th = CONFIG_FSL_DPAA_CEETM_CCS_THRESHOLD_10G;
  56         else
  57 -               cs_th = CONFIG_FSL_DPAA_CS_THRESHOLD_1G;
  58 +               cs_th = CONFIG_FSL_DPAA_CEETM_CCS_THRESHOLD_1G;
  59
  60         qm_cgr_cs_thres_set64(&ccg_params.cs_thres_in, cs_th, 1);
  61         qm_cgr_cs_thres_set64(&ccg_params.cs_thres_out,