From: Yong Wu <yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
To: Matthias Brugger
<matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
Cc: youlin.pei-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
anan.sun-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
Nicolas Boichat
<drinkcat-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
cui.zhang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
chao.hao-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
edison.hsieh-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Evan Green <evgreen-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Tomasz Figa <tfiga-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH v4 7/7] iommu/mediatek: Reduce the tlb flush timeout value
Date: Wed, 16 Oct 2019 11:33:12 +0800 [thread overview]
Message-ID: <1571196792-12382-8-git-send-email-yong.wu@mediatek.com> (raw)
In-Reply-To: <1571196792-12382-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
Reduce the tlb timeout value from 100000us to 1000us. the original value
is so long that affect the multimedia performance. This is only a minor
improvement rather than fixing a issue.
Signed-off-by: Yong Wu <yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
drivers/iommu/mtk_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index c2b7ed5..8ca2e99 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -192,7 +192,7 @@ static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
/* tlb sync */
ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
- tmp, tmp != 0, 10, 100000);
+ tmp, tmp != 0, 10, 1000);
if (ret) {
dev_warn(data->dev,
"Partial TLB flush timed out, falling back to full flush\n");
--
1.9.1
next prev parent reply other threads:[~2019-10-16 3:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-16 3:33 [PATCH v4 0/7] Improve tlb range flush Yong Wu
2019-10-16 3:33 ` [PATCH v4 1/7] iommu/mediatek: Correct the flush_iotlb_all callback Yong Wu
[not found] ` <1571196792-12382-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
2019-10-16 3:33 ` [PATCH v4 2/7] iommu/mediatek: Add a new tlb_lock for tlb_flush Yong Wu
2019-10-23 16:52 ` Will Deacon
2019-10-24 7:22 ` Yong Wu
2019-10-16 3:33 ` [PATCH v4 3/7] iommu/mediatek: Use gather to achieve the tlb range flush Yong Wu
2019-10-23 16:55 ` Will Deacon
2019-10-24 7:22 ` Yong Wu
2019-10-16 3:33 ` [PATCH v4 4/7] iommu/mediatek: Delete the leaf in the tlb_flush Yong Wu
2019-10-16 3:33 ` [PATCH v4 6/7] iommu/mediatek: Get rid of the pgtlock Yong Wu
2019-10-16 3:33 ` Yong Wu [this message]
2019-10-16 3:33 ` [PATCH v4 5/7] iommu/mediatek: Move the tlb_sync into tlb_flush Yong Wu
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