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iommu: rockchip: Introduce flush_iotlb_all to shoot entire tlb once

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Change-Id: I1ef476fcde1b6d323dd2653dc01e27f9990cc6f5
Signed-off-by: Simon Xue <xxm@rock-chips.com>
This commit is contained in:
Simon Xue
2020-02-25 14:20:28 +08:00
committed by Tao Huang
parent 18e0c32625
commit 5bb0884f84
1 changed files with 30 additions and 0 deletions
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30
drivers/iommu/rockchip-iommu.c
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@@ -864,6 +864,35 @@ static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova,
return unmap_size;
}
static void rk_iommu_flush_tlb_all(struct iommu_domain *domain)
{
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
struct list_head *pos;
unsigned long flags;
int i;
spin_lock_irqsave(&rk_domain->iommus_lock, flags);
list_for_each(pos, &rk_domain->iommus) {
struct rk_iommu *iommu;
int ret;
iommu = list_entry(pos, struct rk_iommu, node);
ret = pm_runtime_get_if_in_use(iommu->dev);
if (WARN_ON_ONCE(ret < 0))
continue;
if (ret) {
WARN_ON(clk_bulk_enable(iommu->num_clocks, iommu->clocks));
for (i = 0; i < iommu->num_mmu; i++)
rk_iommu_write(iommu->bases[i], RK_MMU_COMMAND,
RK_MMU_CMD_ZAP_CACHE);
clk_bulk_disable(iommu->num_clocks, iommu->clocks);
pm_runtime_put(iommu->dev);
}
}
spin_unlock_irqrestore(&rk_domain->iommus_lock, flags);
}
static struct rk_iommu *rk_iommu_from_dev(struct device *dev)
{
struct rk_iommudata *data = dev->archdata.iommu;
@@ -1185,6 +1214,7 @@ static const struct iommu_ops rk_iommu_ops = {
.detach_dev = rk_iommu_detach_device,
.map = rk_iommu_map,
.unmap = rk_iommu_unmap,
.flush_iotlb_all = rk_iommu_flush_tlb_all,
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,