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authorJon Mason <jon.mason@exar.com>2010-12-10 14:03:01 +0000
committerDavid S. Miller <davem@davemloft.net>2010-12-10 16:08:24 -0800
commitb55e7b153f698bb027102759388d0c09542f68bd (patch)
tree94f67280040021547e1faad03a26c8251fb6a83f /drivers/net/vxge
parent9c1638871671721e8f3693a0dfbb0e2e05b08742 (diff)
downloadop-kernel-dev-b55e7b153f698bb027102759388d0c09542f68bd.zip
op-kernel-dev-b55e7b153f698bb027102759388d0c09542f68bd.tar.gz
vxge: independent interrupt moderation
Configure the workload clock register and TIM register for independent interrupt moderation based on the individual vpath utilization instead of common link utilization. This greatly improves latency. Signed-off-by: Jon Mason <jon.mason@exar.com> Signed-off-by: Ram Vepa <ram.vepa@exar.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxge')
-rw-r--r--drivers/net/vxge/vxge-config.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/net/vxge/vxge-config.c b/drivers/net/vxge/vxge-config.c
index 1169aa3..01c05f5 100644
--- a/drivers/net/vxge/vxge-config.c
+++ b/drivers/net/vxge/vxge-config.c
@@ -4422,8 +4422,7 @@ __vxge_hw_vpath_tim_configure(struct __vxge_hw_device *hldev, u32 vp_id)
if (config->tti.util_sel != VXGE_HW_USE_FLASH_DEFAULT) {
val64 &= ~VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(0x3f);
- val64 |= VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(
- config->tti.util_sel);
+ val64 |= VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(vp_id);
}
if (config->tti.ltimer_val != VXGE_HW_USE_FLASH_DEFAULT) {
@@ -4527,8 +4526,7 @@ __vxge_hw_vpath_tim_configure(struct __vxge_hw_device *hldev, u32 vp_id)
if (config->rti.util_sel != VXGE_HW_USE_FLASH_DEFAULT) {
val64 &= ~VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(0x3f);
- val64 |= VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(
- config->rti.util_sel);
+ val64 |= VXGE_HW_TIM_CFG3_INT_NUM_UTIL_SEL(vp_id);
}
if (config->rti.ltimer_val != VXGE_HW_USE_FLASH_DEFAULT) {
@@ -4549,6 +4547,11 @@ __vxge_hw_vpath_tim_configure(struct __vxge_hw_device *hldev, u32 vp_id)
writeq(val64, &vp_reg->tim_cfg2_int_num[VXGE_HW_VPATH_INTR_BMAP]);
writeq(val64, &vp_reg->tim_cfg3_int_num[VXGE_HW_VPATH_INTR_BMAP]);
+ val64 = VXGE_HW_TIM_WRKLD_CLC_WRKLD_EVAL_PRD(150);
+ val64 |= VXGE_HW_TIM_WRKLD_CLC_WRKLD_EVAL_DIV(0);
+ val64 |= VXGE_HW_TIM_WRKLD_CLC_CNT_RX_TX(3);
+ writeq(val64, &vp_reg->tim_wrkld_clc);
+
return status;
}
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