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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>
This commit is contained in:
Quan Nguyen 2017-05-10 13:45:07 -07:00 committed by David S. Miller
parent ca6d550c5d
commit a844e7d1fa
3 changed files with 9 additions and 0 deletions
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2
drivers/net/ethernet/apm/xgene/xgene_enet_hw.c
View File

@ -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)

5
drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
View File

@ -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)

2
drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
View File

@ -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)