From: Yong Wu <yong.wu@mediatek.com>
To: Matthias Brugger <matthias.bgg@gmail.com>,
Joerg Roedel <joro@8bytes.org>,
Will Deacon <will.deacon@arm.com>
Cc: youlin.pei@mediatek.com, anan.sun@mediatek.com,
Nicolas Boichat <drinkcat@chromium.org>,
cui.zhang@mediatek.com, srv_heupstream@mediatek.com,
chao.hao@mediatek.com, edison.hsieh@mediatek.com,
linux-kernel@vger.kernel.org, Evan Green <evgreen@chromium.org>,
Tomasz Figa <tfiga@google.com>,
iommu@lists.linux-foundation.org,
linux-mediatek@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 5/7] iommu/mediatek: Move the tlb_sync into tlb_flush
Date: Mon, 4 Nov 2019 15:01:06 +0800 [thread overview]
Message-ID: <1572850868-22315-6-git-send-email-yong.wu@mediatek.com> (raw)
In-Reply-To: <1572850868-22315-1-git-send-email-yong.wu@mediatek.com>
Right now, the tlb_add_flush_nosync and tlb_sync always appear together.
we merge the two functions into one(also move the tlb_lock into the new
function). No functional change.
Signed-off-by: Chao Hao <chao.hao@mediatek.com>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
drivers/iommu/mtk_iommu.c | 45 ++++++++++-----------------------------------
drivers/iommu/mtk_iommu.h | 1 -
2 files changed, 10 insertions(+), 36 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 1d7254c..0e5f41f 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -173,12 +173,16 @@ static void mtk_iommu_tlb_flush_all(void *cookie)
}
}
-static void mtk_iommu_tlb_add_flush_nosync(unsigned long iova, size_t size,
+static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,
size_t granule, void *cookie)
{
struct mtk_iommu_data *data = cookie;
+ unsigned long flags;
+ int ret;
+ u32 tmp;
for_each_m4u(data) {
+ spin_lock_irqsave(&data->tlb_lock, flags);
writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0,
data->base + REG_MMU_INV_SEL);
@@ -187,21 +191,8 @@ static void mtk_iommu_tlb_add_flush_nosync(unsigned long iova, size_t size,
data->base + REG_MMU_INVLD_END_A);
writel_relaxed(F_MMU_INV_RANGE,
data->base + REG_MMU_INVALIDATE);
- data->tlb_flush_active = true;
- }
-}
-
-static void mtk_iommu_tlb_sync(void *cookie)
-{
- struct mtk_iommu_data *data = cookie;
- int ret;
- u32 tmp;
-
- for_each_m4u(data) {
- /* Avoid timing out if there's nothing to wait for */
- if (!data->tlb_flush_active)
- return;
+ /* tlb sync */
ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
tmp, tmp != 0, 10, 100000);
if (ret) {
@@ -211,22 +202,10 @@ static void mtk_iommu_tlb_sync(void *cookie)
}
/* Clear the CPE status */
writel_relaxed(0, data->base + REG_MMU_CPE_DONE);
- data->tlb_flush_active = false;
+ spin_unlock_irqrestore(&data->tlb_lock, flags);
}
}
-static void mtk_iommu_tlb_flush_walk(unsigned long iova, size_t size,
- size_t granule, void *cookie)
-{
- struct mtk_iommu_data *data = cookie;
- unsigned long flags;
-
- spin_lock_irqsave(&data->tlb_lock, flags);
- mtk_iommu_tlb_add_flush_nosync(iova, size, granule, cookie);
- mtk_iommu_tlb_sync(cookie);
- spin_unlock_irqrestore(&data->tlb_lock, flags);
-}
-
static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather,
unsigned long iova, size_t granule,
void *cookie)
@@ -239,8 +218,8 @@ static void mtk_iommu_tlb_flush_page_nosync(struct iommu_iotlb_gather *gather,
static const struct iommu_flush_ops mtk_iommu_flush_ops = {
.tlb_flush_all = mtk_iommu_tlb_flush_all,
- .tlb_flush_walk = mtk_iommu_tlb_flush_walk,
- .tlb_flush_leaf = mtk_iommu_tlb_flush_walk,
+ .tlb_flush_walk = mtk_iommu_tlb_flush_range_sync,
+ .tlb_flush_leaf = mtk_iommu_tlb_flush_range_sync,
.tlb_add_page = mtk_iommu_tlb_flush_page_nosync,
};
@@ -455,16 +434,12 @@ static void mtk_iommu_iotlb_sync(struct iommu_domain *domain,
{
struct mtk_iommu_data *data = mtk_iommu_get_m4u_data();
size_t length = gather->end - gather->start;
- unsigned long flags;
if (gather->start == ULONG_MAX)
return;
- spin_lock_irqsave(&data->tlb_lock, flags);
- mtk_iommu_tlb_add_flush_nosync(gather->start, length, gather->pgsize,
+ mtk_iommu_tlb_flush_range_sync(gather->start, length, gather->pgsize,
data);
- mtk_iommu_tlb_sync(data);
- spin_unlock_irqrestore(&data->tlb_lock, flags);
}
static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 8cae22d..ea949a3 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -57,7 +57,6 @@ struct mtk_iommu_data {
struct mtk_iommu_domain *m4u_dom;
struct iommu_group *m4u_group;
bool enable_4GB;
- bool tlb_flush_active;
spinlock_t tlb_lock; /* lock for tlb range flush */
struct iommu_device iommu;
--
1.9.1
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iommu@lists.linux-foundation.org
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next prev parent reply other threads:[~2019-11-04 7:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-04 7:01 [PATCH v5 0/7] Improve tlb range flush Yong Wu
2019-11-04 7:01 ` [PATCH v5 1/7] iommu/mediatek: Correct the flush_iotlb_all callback Yong Wu
2019-11-04 7:01 ` [PATCH v5 2/7] iommu/mediatek: Add a new tlb_lock for tlb_flush Yong Wu
2019-11-04 7:01 ` [PATCH v5 3/7] iommu/mediatek: Use gather to achieve the tlb range flush Yong Wu
2019-11-04 7:01 ` [PATCH v5 4/7] iommu/mediatek: Delete the leaf in the tlb_flush Yong Wu
2019-11-04 7:01 ` Yong Wu [this message]
2019-11-04 7:01 ` [PATCH v5 6/7] iommu/mediatek: Get rid of the pgtlock Yong Wu
2019-11-04 7:01 ` [PATCH v5 7/7] iommu/mediatek: Reduce the tlb flush timeout value Yong Wu
2019-11-04 15:17 ` [PATCH v5 0/7] Improve tlb range flush Will Deacon
2019-11-11 14:02 ` Joerg Roedel
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