linux-kernel - [RFC PATCH v2 5/6] powerpc/iommu: Move dev_has_iommu

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Date: Tue, 30 Apr 2024 15:06:42 -0500
From: Shivaprasad G Bhat <sbhat@...ux.ibm.com>
To: mpe@...erman.id.au, tpearson@...torengineering.com,
        alex.williamson@...hat.com, linuxppc-dev@...ts.ozlabs.org, aik@....com
Cc: npiggin@...il.com, christophe.leroy@...roup.eu, aneesh.kumar@...nel.org,
        naveen.n.rao@...ux.ibm.com, gbatra@...ux.vnet.ibm.com,
        brking@...ux.vnet.ibm.com, sbhat@...ux.ibm.com, aik@...abs.ru,
        jgg@...pe.ca, ruscur@...sell.cc, robh@...nel.org,
        linux-kernel@...r.kernel.org, joel@....id.au, kvm@...r.kernel.org,
        msuchanek@...e.de, oohall@...il.com, mahesh@...ux.ibm.com,
        jroedel@...e.de, vaibhav@...ux.ibm.com, svaidy@...ux.ibm.com
Subject: [RFC PATCH v2 5/6] powerpc/iommu: Move dev_has_iommu_table() to
 iommu.c

Move function dev_has_iommu_table() to powerpc/kernel/iommu.c
as it is going to be used by machine specific iommu code as
well in subsequent patches.

Signed-off-by: Shivaprasad G Bhat <sbhat@...ux.ibm.com>
---
 arch/powerpc/include/asm/iommu.h |    1 +
 arch/powerpc/kernel/eeh.c        |   16 ----------------
 arch/powerpc/kernel/iommu.c      |   17 +++++++++++++++++
 3 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h
index 744cc5fc22d3..784809e34abe 100644
--- a/arch/powerpc/include/asm/iommu.h
+++ b/arch/powerpc/include/asm/iommu.h
@@ -220,6 +220,7 @@ extern long iommu_tce_xchg_no_kill(struct mm_struct *mm,
 		enum dma_data_direction *direction);
 extern void iommu_tce_kill(struct iommu_table *tbl,
 		unsigned long entry, unsigned long pages);
+int dev_has_iommu_table(struct device *dev, void *data);
 
 #else
 static inline void iommu_register_group(struct iommu_table_group *table_group,
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index ab316e155ea9..37bfbef929b5 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -1264,22 +1264,6 @@ EXPORT_SYMBOL(eeh_dev_release);
 
 #ifdef CONFIG_IOMMU_API
 
-static int dev_has_iommu_table(struct device *dev, void *data)
-{
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct pci_dev **ppdev = data;
-
-	if (!dev)
-		return 0;
-
-	if (device_iommu_mapped(dev)) {
-		*ppdev = pdev;
-		return 1;
-	}
-
-	return 0;
-}
-
 /**
  * eeh_iommu_group_to_pe - Convert IOMMU group to EEH PE
  * @group: IOMMU group
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index bc4584e73061..31dc663be0cc 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -987,6 +987,23 @@ unsigned long iommu_direction_to_tce_perm(enum dma_data_direction dir)
 EXPORT_SYMBOL_GPL(iommu_direction_to_tce_perm);
 
 #ifdef CONFIG_IOMMU_API
+
+int dev_has_iommu_table(struct device *dev, void *data)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct pci_dev **ppdev = data;
+
+	if (!dev)
+		return 0;
+
+	if (device_iommu_mapped(dev)) {
+		*ppdev = pdev;
+		return 1;
+	}
+
+	return 0;
+}
+
 /*
  * SPAPR TCE API
  */