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net: hns: bug fix about setting coalsecs-usecs to 0

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When set rx/tx coalesce usecs to 0, the interrupt coalesce will be
disabled, but there is a interrupt rate limit which set to 1us, it
will cause no interrupt occurs. This patch disable interrupt limit
when sets coalsecs usecs to 0, and restores it to 1 in other case.

Signed-off-by: Daode Huang <huangdaode@hisilicon.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Daode Huang 2016-09-29 18:09:10 +01:00 committed by Doug Ledford
parent 0e97cd4e46
commit 6771cbf944
2 changed files with 20 additions and 0 deletions
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16
drivers/net/ethernet/hisilicon/hns/hns_dsaf_rcb.c
View File

@ -543,6 +543,22 @@ int hns_rcb_set_coalesce_usecs(
"error: coalesce_usecs setting supports 0~1023us\n");
return -EINVAL;
}
if (!AE_IS_VER1(rcb_common->dsaf_dev->dsaf_ver)) {
if (timeout == 0)
/* set timeout to 0, Disable gap time */
dsaf_set_reg_field(rcb_common->io_base,
RCB_INT_GAP_TIME_REG + port_idx * 4,
PPE_INT_GAPTIME_M, PPE_INT_GAPTIME_B,
0);
else
/* set timeout non 0, restore gap time to 1 */
dsaf_set_reg_field(rcb_common->io_base,
RCB_INT_GAP_TIME_REG + port_idx * 4,
PPE_INT_GAPTIME_M, PPE_INT_GAPTIME_B,
1);
}
hns_rcb_set_port_timeout(rcb_common, port_idx, timeout);
return 0;
}

4
drivers/net/ethernet/hisilicon/hns/hns_dsaf_reg.h
View File

@ -417,6 +417,7 @@
#define RCB_CFG_OVERTIME_REG 0x9300
#define RCB_CFG_PKTLINE_INT_NUM_REG 0x9304
#define RCB_CFG_OVERTIME_INT_NUM_REG 0x9308
#define RCB_INT_GAP_TIME_REG 0x9400
#define RCB_PORT_CFG_OVERTIME_REG 0x9430
#define RCB_RING_RX_RING_BASEADDR_L_REG 0x00000
@ -898,6 +899,9 @@
#define PPE_CNT_CLR_CE_B 0
#define PPE_CNT_CLR_SNAP_EN_B 1
#define PPE_INT_GAPTIME_B 0
#define PPE_INT_GAPTIME_M 0x3ff
#define PPE_COMMON_CNT_CLR_CE_B 0
#define PPE_COMMON_CNT_CLR_SNAP_EN_B 1
#define RCB_COM_TSO_MODE_B 0