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