[PATCH kernel] powerpc/iommu/ioda2: Enable compile with IOV=on and IOMMU_API=off

Alexey Kardashevskiy
2015-06-15T07:56:23Z

The pnv_pci_ioda2_unset_window() function is used to do the final
cleanup of a DMA window being released:
- via VFIO ioctl by the guest request;
- via unplugging a virtual PCI function.
However the function was under #ifdef CONFIG_IOMMU_API and was missing.

This moves the helper outside of IOMMU_API block and enables it
for either or both IOMMU_API and PCI_IOV.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 50 ++++++++++++++++---------------
1 file changed, 26 insertions(+), 24 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index b9f0f43..8424f5c 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -2116,6 +2116,32 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe)
return 0;
}

+#if defined(CONFIG_IOMMU_API) || defined(CONFIG_PCI_IOV)
+static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
+ int num)
+{
+ struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
+ table_group);
+ struct pnv_phb *phb = pe->phb;
+ long ret;
+
+ pe_info(pe, "Removing DMA window #%d\n", num);
+
+ ret = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
+ (pe->pe_number << 1) + num,
+ 0/* levels */, 0/* table address */,
+ 0/* table size */, 0/* page size */);
+ if (ret)
+ pe_warn(pe, "Unmapping failed, ret = %ld\n", ret);
+ else
+ pnv_pci_ioda2_tce_invalidate_entire(pe);
+
+ pnv_pci_unlink_table_and_group(table_group->tables[num], table_group);
+
+ return ret;
+}
+#endif
+
#ifdef CONFIG_IOMMU_API
static unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
__u64 window_size, __u32 levels)
@@ -2149,30 +2175,6 @@ static unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
return bytes;
}

-static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
- int num)
-{
- struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
- table_group);
- struct pnv_phb *phb = pe->phb;
- long ret;
-
- pe_info(pe, "Removing DMA window #%d\n", num);
-
- ret = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number,
- (pe->pe_number << 1) + num,
- 0/* levels */, 0/* table address */,
- 0/* table size */, 0/* page size */);
- if (ret)
- pe_warn(pe, "Unmapping failed, ret = %ld\n", ret);
- else
- pnv_pci_ioda2_tce_invalidate_entire(pe);
-
- pnv_pci_unlink_table_and_group(table_group->tables[num], table_group);
-
- return ret;
-}
-
static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group)
{
struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,
--
2.4.0.rc3.8.gfb3e7d5