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| author | Quan Nguyen <qnguyen@apm.com> | 2017-05-10 13:45:07 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-16 11:41:10 -0400 |
| commit | a844e7d1fa24660dd17a78e5165210a3da112e73 (patch) | |
| tree | 6541ec1e07427370dda7a33aa52a35018d009c2d /drivers/net | |
| parent | ca6d550c5dbe66e9e26eb52b7b1713b801f86c4f (diff) | |
| download | linux-a844e7d1fa24660dd17a78e5165210a3da112e73.tar.gz linux-a844e7d1fa24660dd17a78e5165210a3da112e73.tar.bz2 linux-a844e7d1fa24660dd17a78e5165210a3da112e73.zip | |
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 <qnguyen@apm.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c | 5 | ||||
| -rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c | 2 |
3 files changed, 9 insertions, 0 deletions
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) |