powerpc/iommu: Move tce_xxx callbacks from ppc_md to iommu_table
This adds a iommu_table_ops struct and puts pointer to it into
the iommu_table struct. This moves tce_build/tce_free/tce_get/tce_flush
callbacks from ppc_md to the new struct where they really belong to.
This adds the requirement for @it_ops to be initialized before calling
iommu_init_table() to make sure that we do not leave any IOMMU table
with iommu_table_ops uninitialized. This is not a parameter of
iommu_init_table() though as there will be cases when iommu_init_table()
will not be called on TCE tables, for example - VFIO.
This does s/tce_build/set/, s/tce_free/clear/ and removes "tce_"
redundant prefixes.
This removes tce_xxx_rm handlers from ppc_md but does not add
them to iommu_table_ops as this will be done later if we decide to
support TCE hypercalls in real mode. This removes _vm callbacks as
only virtual mode is supported by now so this also removes @rm parameter.
For pSeries, this always uses tce_buildmulti_pSeriesLP/
tce_buildmulti_pSeriesLP. This changes multi callback to fall back to
tce_build_pSeriesLP/tce_free_pSeriesLP if FW_FEATURE_MULTITCE is not
present. The reason for this is we still have to support "multitce=off"
boot parameter in disable_multitce() and we do not want to walk through
all IOMMU tables in the system and replace "multi" callbacks with single
ones.
For powernv, this defines _ops per PHB type which are P5IOC2/IODA1/IODA2.
This makes the callbacks for them public. Later patches will extend
callbacks for IODA1/2.
No change in behaviour is expected.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index d00a5663..90bcdfe 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -286,6 +286,12 @@
return 0;
}
+static struct iommu_table_ops iommu_dart_ops = {
+ .set = dart_build,
+ .clear = dart_free,
+ .flush = dart_flush,
+};
+
static void iommu_table_dart_setup(void)
{
iommu_table_dart.it_busno = 0;
@@ -298,6 +304,7 @@
iommu_table_dart.it_base = (unsigned long)dart_vbase;
iommu_table_dart.it_index = 0;
iommu_table_dart.it_blocksize = 1;
+ iommu_table_dart.it_ops = &iommu_dart_ops;
iommu_init_table(&iommu_table_dart, -1);
/* Reserve the last page of the DART to avoid possible prefetch
@@ -386,11 +393,6 @@
if (dart_init(dn) != 0)
goto bail;
- /* Setup low level TCE operations for the core IOMMU code */
- ppc_md.tce_build = dart_build;
- ppc_md.tce_free = dart_free;
- ppc_md.tce_flush = dart_flush;
-
/* Setup bypass if supported */
if (dart_is_u4)
ppc_md.dma_set_mask = dart_dma_set_mask;