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| author | Yong Wu <yong.wu@mediatek.com> | 2019-11-04 10:01:03 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-11-11 17:02:34 +0300 |
| commit | da3cc91b8db403728cde03c8a95cba268d8cbf1b (patch) | |
| tree | 3315f185708baee994c1306d48f63053d016bcc6 /drivers/iommu/mtk_iommu.h | |
| parent | 2009122f1d83dd8375572661961eab1e7e86bffe (diff) | |
| download | linux-da3cc91b8db403728cde03c8a95cba268d8cbf1b.tar.xz | |
iommu/mediatek: Add a new tlb_lock for tlb_flush
The commit 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API
TLB sync") help move the tlb_sync of unmap from v7s into the iommu
framework. It helps add a new function "mtk_iommu_iotlb_sync", But it
lacked the lock, then it will cause the variable "tlb_flush_active"
may be changed unexpectedly, we could see this warning log randomly:
mtk-iommu 10205000.iommu: Partial TLB flush timed out, falling back to
full flush
The HW requires tlb_flush/tlb_sync in pairs strictly, this patch adds
a new tlb_lock for tlb operations to fix this issue.
Fixes: 4d689b619445 ("iommu/io-pgtable-arm-v7s: Convert to IOMMU API TLB sync")
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/mtk_iommu.h')
| -rw-r--r-- | drivers/iommu/mtk_iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index fc0f16eabacd..8cae22de7663 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -58,6 +58,7 @@ struct mtk_iommu_data { 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; const struct mtk_iommu_plat_data *plat_data; |