From b55e7b153f698bb027102759388d0c09542f68bd Mon Sep 17 00:00:00 2001
From: Jon Mason <jon.mason@exar.com>
Date: Fri, 10 Dec 2010 14:03:01 +0000
Subject: [PATCH] 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>
---
drivers/net/vxge/vxge-config.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/net/vxge/vxge-config.c b/drivers/net/vxge/vxge-config.c
index 1169aa387cab..01c05f53e2f9 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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