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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/include/asm/dma-iommu.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/asm/dma-iommu.h')
-rw-r--r--arch/arm/include/asm/dma-iommu.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h
new file mode 100644
index 000000000..fe9ef6f79
--- /dev/null
+++ b/arch/arm/include/asm/dma-iommu.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ASMARM_DMA_IOMMU_H
+#define ASMARM_DMA_IOMMU_H
+
+#ifdef __KERNEL__
+
+#include <linux/mm_types.h>
+#include <linux/scatterlist.h>
+#include <linux/kref.h>
+
+struct dma_iommu_mapping {
+ /* iommu specific data */
+ struct iommu_domain *domain;
+
+ unsigned long **bitmaps; /* array of bitmaps */
+ unsigned int nr_bitmaps; /* nr of elements in array */
+ unsigned int extensions;
+ size_t bitmap_size; /* size of a single bitmap */
+ size_t bits; /* per bitmap */
+ dma_addr_t base;
+
+ spinlock_t lock;
+ struct kref kref;
+};
+
+struct dma_iommu_mapping *
+arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size);
+
+void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
+
+int arm_iommu_attach_device(struct device *dev,
+ struct dma_iommu_mapping *mapping);
+void arm_iommu_detach_device(struct device *dev);
+
+#endif /* __KERNEL__ */
+#endif