[kernel,v2,5/7] powerpc/iommu: Add a window number to iommu_table_group_ops::get_table_size
diff mbox series

Message ID 20200323075354.93825-6-aik@ozlabs.ru
State New
Headers show
Series
  • powerpc/powenv/ioda: Allow huge DMA window at 4GB
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Context Check Description
snowpatch_ozlabs/needsstable success Patch has no Fixes tags
snowpatch_ozlabs/checkpatch warning total: 0 errors, 0 warnings, 3 checks, 41 lines checked
snowpatch_ozlabs/apply_patch success Successfully applied on branch powerpc/merge (a87b93bdf800a4d7a42d95683624a4516e516b4f)

Commit Message

Alexey Kardashevskiy March 23, 2020, 7:53 a.m. UTC
We are about to add an additional offset within a TCE table which is
going to increase the size of the window, prepare for this.

This should cause no behavioral change.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 arch/powerpc/include/asm/iommu.h          | 1 +
 arch/powerpc/platforms/powernv/pci.h      | 2 +-
 arch/powerpc/platforms/powernv/pci-ioda.c | 4 ++--
 drivers/vfio/vfio_iommu_spapr_tce.c       | 4 ++--
 4 files changed, 6 insertions(+), 5 deletions(-)

Patch
diff mbox series

diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 479439ef003e..acf64a73ead1 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -161,6 +161,7 @@  struct iommu_table_group;
 
 struct iommu_table_group_ops {
 	unsigned long (*get_table_size)(
+			int num,
 			__u32 page_shift,
 			__u64 window_size,
 			__u32 levels);
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index ce00278185b0..d8fa2f65517e 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -192,7 +192,7 @@  extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
 extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);
 extern struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev);
 extern void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq);
-extern unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
+extern unsigned long pnv_pci_ioda2_get_table_size(int num, __u32 page_shift,
 		__u64 window_size, __u32 levels);
 extern int pnv_eeh_post_init(void);
 
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 9928a1618a8b..27a505a5edb4 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -2597,7 +2597,7 @@  static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group,
 #endif
 
 #ifdef CONFIG_IOMMU_API
-unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift,
+unsigned long pnv_pci_ioda2_get_table_size(int num, __u32 page_shift,
 		__u64 window_size, __u32 levels)
 {
 	unsigned long bytes = 0;
@@ -2644,7 +2644,7 @@  static long pnv_pci_ioda2_create_table_userspace(
 
 	if (!ret)
 		(*ptbl)->it_allocated_size = pnv_pci_ioda2_get_table_size(
-				page_shift, window_size, levels);
+				num, page_shift, window_size, levels);
 	return ret;
 }
 
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index 16b3adc508db..750a0676e9b7 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -613,8 +613,8 @@  static long tce_iommu_create_table(struct tce_container *container,
 {
 	long ret, table_size;
 
-	table_size = table_group->ops->get_table_size(page_shift, window_size,
-			levels);
+	table_size = table_group->ops->get_table_size(num, page_shift,
+			window_size, levels);
 	if (!table_size)
 		return -EINVAL;