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authorAlexey Kardashevskiy <aik@ozlabs.ru>2012-09-04 15:19:35 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-09-10 14:36:17 +1000
commit11f63d3fb9c4257b1f005db8d11deba9f992bdf6 (patch)
treea9ab9deefe703cd00c020cba522b4700a64f775b /arch/powerpc/platforms/powernv/pci.c
parent4715fed600109e0bd3d6cfa2b925a643173a08b4 (diff)
downloadvexpress-lsk-11f63d3fb9c4257b1f005db8d11deba9f992bdf6.tar.gz
powerpc/iommu: Add ppc_md.tce_get() callback for use by VFIO
The upcoming VFIO support requires a way to know which entry in the TCE map is not empty in order to do cleanup at QEMU exit/crash. This patch adds such functionality to POWERNV platform code. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/platforms/powernv/pci.c')
-rw-r--r--arch/powerpc/platforms/powernv/pci.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index 1e908aef420..c01688a1a74 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -446,6 +446,11 @@ static void pnv_tce_free(struct iommu_table *tbl, long index, long npages)
pnv_tce_invalidate(tbl, tces, tcep - 1);
}
+static unsigned long pnv_tce_get(struct iommu_table *tbl, long index)
+{
+ return ((u64 *)tbl->it_base)[index - tbl->it_offset];
+}
+
void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
void *tce_mem, u64 tce_size,
u64 dma_offset)
@@ -596,6 +601,7 @@ void __init pnv_pci_init(void)
ppc_md.pci_dma_dev_setup = pnv_pci_dma_dev_setup;
ppc_md.tce_build = pnv_tce_build;
ppc_md.tce_free = pnv_tce_free;
+ ppc_md.tce_get = pnv_tce_get;
ppc_md.pci_probe_mode = pnv_pci_probe_mode;
set_pci_dma_ops(&dma_iommu_ops);