diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/swiotlb.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/swiotlb.h')
-rw-r--r-- | kernel/include/linux/swiotlb.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/kernel/include/linux/swiotlb.h b/kernel/include/linux/swiotlb.h new file mode 100644 index 000000000..e7a018eaf --- /dev/null +++ b/kernel/include/linux/swiotlb.h @@ -0,0 +1,121 @@ +#ifndef __LINUX_SWIOTLB_H +#define __LINUX_SWIOTLB_H + +#include <linux/types.h> + +struct device; +struct dma_attrs; +struct scatterlist; + +extern int swiotlb_force; + +/* + * Maximum allowable number of contiguous slabs to map, + * must be a power of 2. What is the appropriate value ? + * The complexity of {map,unmap}_single is linearly dependent on this value. + */ +#define IO_TLB_SEGSIZE 128 + +/* + * log of the size of each IO TLB slab. The number of slabs is command line + * controllable. + */ +#define IO_TLB_SHIFT 11 + +extern void swiotlb_init(int verbose); +int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose); +extern unsigned long swiotlb_nr_tbl(void); +unsigned long swiotlb_size_or_default(void); +extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs); + +/* + * Enumeration for sync targets + */ +enum dma_sync_target { + SYNC_FOR_CPU = 0, + SYNC_FOR_DEVICE = 1, +}; + +/* define the last possible byte of physical address space as a mapping error */ +#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0) + +extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, + dma_addr_t tbl_dma_addr, + phys_addr_t phys, size_t size, + enum dma_data_direction dir); + +extern void swiotlb_tbl_unmap_single(struct device *hwdev, + phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir); + +extern void swiotlb_tbl_sync_single(struct device *hwdev, + phys_addr_t tlb_addr, + size_t size, enum dma_data_direction dir, + enum dma_sync_target target); + +/* Accessory functions. */ +extern void +*swiotlb_alloc_coherent(struct device *hwdev, size_t size, + dma_addr_t *dma_handle, gfp_t flags); + +extern void +swiotlb_free_coherent(struct device *hwdev, size_t size, + void *vaddr, dma_addr_t dma_handle); + +extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs); +extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs); + +extern int +swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents, + enum dma_data_direction dir); + +extern void +swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents, + enum dma_data_direction dir); + +extern int +swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, + enum dma_data_direction dir, struct dma_attrs *attrs); + +extern void +swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl, + int nelems, enum dma_data_direction dir, + struct dma_attrs *attrs); + +extern void +swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir); + +extern void +swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); + +extern void +swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr, + size_t size, enum dma_data_direction dir); + +extern void +swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg, + int nelems, enum dma_data_direction dir); + +extern int +swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr); + +extern int +swiotlb_dma_supported(struct device *hwdev, u64 mask); + +#ifdef CONFIG_SWIOTLB +extern void __init swiotlb_free(void); +#else +static inline void swiotlb_free(void) { } +#endif + +extern void swiotlb_print_info(void); +extern int is_swiotlb_buffer(phys_addr_t paddr); + +#endif /* __LINUX_SWIOTLB_H */ |