Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc

Pull sparc updates from David Miller:
 "The PowerPC folks have a really nice scalable IOMMU pool allocator
  that we wanted to make use of for sparc.  So here we have a series
  that abstracts out their code into a common layer that anyone can make
  use of.

  Sparc is converted, and the PowerPC folks have reviewed and ACK'd this
  series and plan to convert PowerPC over as well"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  iommu-common: Fix PARISC compile-time warnings
  sparc: Make LDC use common iommu poll management functions
  sparc: Make sparc64 use scalable lib/iommu-common.c functions
  sparc: Break up monolithic iommu table/lock into finer graularity pools and lock

1 files changed, 55 insertions, 0 deletions

diff --git a/include/linux/iommu-common.h b/include/linux/iommu-common.h
new file mode 100644
index 000000000000..6be5c863f329
--- /dev/null
+++ b/include/linux/iommu-common.h
@@ -0,0 +1,55 @@
+#ifndef _LINUX_IOMMU_COMMON_H
+#define _LINUX_IOMMU_COMMON_H
+
+#include <linux/spinlock_types.h>
+#include <linux/device.h>
+#include <asm/page.h>
+
+#define IOMMU_POOL_HASHBITS     4
+#define IOMMU_NR_POOLS          (1 << IOMMU_POOL_HASHBITS)
+
+struct iommu_pool {
+	unsigned long	start;
+	unsigned long	end;
+	unsigned long	hint;
+	spinlock_t	lock;
+};
+
+struct iommu_table;
+
+struct iommu_tbl_ops {
+	unsigned long	(*cookie_to_index)(u64, void *);
+	void		(*demap)(void *, unsigned long, unsigned long);
+	void		(*reset)(struct iommu_table *);
+};
+
+struct iommu_table {
+	unsigned long		page_table_map_base;
+	unsigned long		page_table_shift;
+	unsigned long		nr_pools;
+	const struct iommu_tbl_ops  *iommu_tbl_ops;
+	unsigned long		poolsize;
+	struct iommu_pool	arena_pool[IOMMU_NR_POOLS];
+	u32			flags;
+#define	IOMMU_HAS_LARGE_POOL	0x00000001
+	struct iommu_pool	large_pool;
+	unsigned long		*map;
+};
+
+extern void iommu_tbl_pool_init(struct iommu_table *iommu,
+				unsigned long num_entries,
+				u32 page_table_shift,
+				const struct iommu_tbl_ops *iommu_tbl_ops,
+				bool large_pool, u32 npools);
+
+extern unsigned long iommu_tbl_range_alloc(struct device *dev,
+					   struct iommu_table *iommu,
+					   unsigned long npages,
+					   unsigned long *handle,
+					   unsigned int pool_hash);
+
+extern void iommu_tbl_range_free(struct iommu_table *iommu,
+				 u64 dma_addr, unsigned long npages,
+				 bool do_demap, void *demap_arg);
+
+#endif