From: Quan Nguyen Date: Wed, 10 May 2017 20:45:07 +0000 (-0700) Subject: drivers: net: xgene: Workaround for HW errata 10GE_4 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a844e7d1fa24660dd17a78e5165210a3da112e73;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drivers: net: xgene: Workaround for HW errata 10GE_4 This patch adds workaround for HW errata 10GE_4: "XGENET_ICM_ECM_DROP_COUNT_REG_0 reg not clear on read". Signed-off-by: Quan Nguyen Signed-off-by: Iyappan Subramanian Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c index 5278d62d5b57..3235d0cf3942 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c @@ -626,6 +626,8 @@ static void xgene_gmac_get_drop_cnt(struct xgene_enet_pdata *pdata, xgene_enet_rd_mcx_csr(pdata, ICM_ECM_DROP_COUNT_REG0_ADDR, &count); *rx = ICM_DROP_COUNT(count); *tx = ECM_DROP_COUNT(count); + /* Errata: 10GE_4 - Fix ICM_ECM_DROP_COUNT not clear-on-read */ + xgene_enet_rd_mcx_csr(pdata, ECM_CONFIG0_REG_0_ADDR, &count); } static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata) diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c index 2919d3e36fad..31df8f32c214 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c @@ -106,6 +106,11 @@ static void xgene_sgmac_get_drop_cnt(struct xgene_enet_pdata *pdata, count = xgene_enet_rd_mcx_csr(pdata, addr); *rx = ICM_DROP_COUNT(count); *tx = ECM_DROP_COUNT(count); + /* Errata: 10GE_4 - ICM_ECM_DROP_COUNT not clear-on-read */ + addr = (pdata->enet_id != XGENE_ENET1) ? + XG_MCX_ECM_CONFIG0_REG_0_ADDR : + ECM_CONFIG0_REG_0_ADDR + pdata->port_id * OFFSET_4; + xgene_enet_rd_mcx_csr(pdata, addr); } static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p) diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c index 56dff380cbb7..eab6f1c12f1c 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c @@ -188,6 +188,8 @@ static void xgene_xgmac_get_drop_cnt(struct xgene_enet_pdata *pdata, xgene_enet_rd_axg_csr(pdata, XGENET_ICM_ECM_DROP_COUNT_REG0, &count); *rx = ICM_DROP_COUNT(count); *tx = ECM_DROP_COUNT(count); + /* Errata: 10GE_4 - ICM_ECM_DROP_COUNT not clear-on-read */ + xgene_enet_rd_axg_csr(pdata, XGENET_ECM_CONFIG0_REG_0, &count); } static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)