evie/android_kernel_oneplus_msm8998
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iommu/io-pgtable-fast: invalidate TLBs on unmap

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When not using the "public" fastmap unmap API make sure we
take care of invalidating the TLBs.

Change-Id: Ia74d4ae7d6352bd9ff57247e9fe2ef74daa1ac1c
Signed-off-by: Liam Mark <lmark@codeaurora.org>
This commit is contained in:
Liam Mark 2017-04-04 12:25:30 -07:00
parent 26db194916
commit 9591d38b52
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/io-pgtable-fast.c
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@ -256,16 +256,17 @@ void av8l_fast_unmap_public(av8l_fast_iopte *ptep, size_t size)
__av8l_fast_unmap(ptep, size, true);
}
/* upper layer must take care of TLB invalidation */
static size_t av8l_fast_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size)
{
struct av8l_fast_io_pgtable *data = iof_pgtable_ops_to_data(ops);
struct io_pgtable *iop = &data->iop;
av8l_fast_iopte *ptep = iopte_pmd_offset(data->pmds, data->base, iova);
unsigned long nptes = size >> AV8L_FAST_PAGE_SHIFT;
__av8l_fast_unmap(ptep, size, false);
dmac_clean_range(ptep, ptep + nptes);
iop->cfg.tlb->tlb_flush_all(iop->cookie);
return size;
}