diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-04-03 16:34:58 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-09 07:54:27 +0300 |
| commit | 0d3fdb157fd0b96b06be7f1d8cea21dd2bc030da (patch) | |
| tree | 83a1be817f90bdaa771c4f213e3b4acd7f36d38d /arch/sparc/include/asm/iommu-common.h | |
| parent | 6e88628d03dda355a6fb3384680c1a075dd9a878 (diff) | |
| download | linux-0d3fdb157fd0b96b06be7f1d8cea21dd2bc030da.tar.xz | |
iommu-common: move to arch/sparc
This code is only used by sparc, and all new iommu drivers should use the
drivers/iommu/ framework. Also remove the unused exports.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Diffstat (limited to 'arch/sparc/include/asm/iommu-common.h')
| -rw-r--r-- | arch/sparc/include/asm/iommu-common.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/iommu-common.h b/arch/sparc/include/asm/iommu-common.h new file mode 100644 index 000000000000..802c90c79d1f --- /dev/null +++ b/arch/sparc/include/asm/iommu-common.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#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) +#define IOMMU_ERROR_CODE (~(unsigned long) 0) + +struct iommu_pool { + unsigned long start; + unsigned long end; + unsigned long hint; + spinlock_t lock; +}; + +struct iommu_map_table { + unsigned long table_map_base; + unsigned long table_shift; + unsigned long nr_pools; + void (*lazy_flush)(struct iommu_map_table *); + unsigned long poolsize; + struct iommu_pool pools[IOMMU_NR_POOLS]; + u32 flags; +#define IOMMU_HAS_LARGE_POOL 0x00000001 +#define IOMMU_NO_SPAN_BOUND 0x00000002 +#define IOMMU_NEED_FLUSH 0x00000004 + struct iommu_pool large_pool; + unsigned long *map; +}; + +extern void iommu_tbl_pool_init(struct iommu_map_table *iommu, + unsigned long num_entries, + u32 table_shift, + void (*lazy_flush)(struct iommu_map_table *), + bool large_pool, u32 npools, + bool skip_span_boundary_check); + +extern unsigned long iommu_tbl_range_alloc(struct device *dev, + struct iommu_map_table *iommu, + unsigned long npages, + unsigned long *handle, + unsigned long mask, + unsigned int align_order); + +extern void iommu_tbl_range_free(struct iommu_map_table *iommu, + u64 dma_addr, unsigned long npages, + unsigned long entry); + +#endif |