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-rw-r--r--arch/sparc/kernel/iommu_common.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sparc/kernel/iommu_common.h b/arch/sparc/kernel/iommu_common.h
new file mode 100644
index 000000000..d62ed9c56
--- /dev/null
+++ b/arch/sparc/kernel/iommu_common.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* iommu_common.h: UltraSparc SBUS/PCI common iommu declarations.
+ *
+ * Copyright (C) 1999, 2008 David S. Miller (davem@davemloft.net)
+ */
+
+#ifndef _IOMMU_COMMON_H
+#define _IOMMU_COMMON_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/scatterlist.h>
+#include <linux/device.h>
+#include <linux/iommu-helper.h>
+
+#include <asm/iommu.h>
+
+/*
+ * These give mapping size of each iommu pte/tlb.
+ */
+#define IO_PAGE_SHIFT 13
+#define IO_PAGE_SIZE (1UL << IO_PAGE_SHIFT)
+#define IO_PAGE_MASK (~(IO_PAGE_SIZE-1))
+#define IO_PAGE_ALIGN(addr) ALIGN(addr, IO_PAGE_SIZE)
+
+#define IO_TSB_ENTRIES (128*1024)
+#define IO_TSB_SIZE (IO_TSB_ENTRIES * 8)
+
+/*
+ * This is the hardwired shift in the iotlb tag/data parts.
+ */
+#define IOMMU_PAGE_SHIFT 13
+
+#define SG_ENT_PHYS_ADDRESS(SG) (__pa(sg_virt((SG))))
+
+static inline int is_span_boundary(unsigned long entry,
+ unsigned long shift,
+ unsigned long boundary_size,
+ struct scatterlist *outs,
+ struct scatterlist *sg)
+{
+ unsigned long paddr = SG_ENT_PHYS_ADDRESS(outs);
+ int nr = iommu_num_pages(paddr, outs->dma_length + sg->length,
+ IO_PAGE_SIZE);
+
+ return iommu_is_span_boundary(entry, nr, shift, boundary_size);
+}
+
+#endif /* _IOMMU_COMMON_H */