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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b81ea27b23
Impact: generalize the sw-IOTLB range checks Some architectures require special rules to determine whether a range needs mapping or not. This adds a weak function for architectures to override. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
#ifndef __LINUX_SWIOTLB_H
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#define __LINUX_SWIOTLB_H
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#include <linux/types.h>
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struct device;
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struct dma_attrs;
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struct scatterlist;
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/*
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* Maximum allowable number of contiguous slabs to map,
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* must be a power of 2. What is the appropriate value ?
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* The complexity of {map,unmap}_single is linearly dependent on this value.
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*/
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#define IO_TLB_SEGSIZE 128
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/*
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* log of the size of each IO TLB slab. The number of slabs is command line
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* controllable.
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*/
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#define IO_TLB_SHIFT 11
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extern void
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swiotlb_init(void);
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extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
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extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
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extern dma_addr_t swiotlb_phys_to_bus(phys_addr_t address);
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extern phys_addr_t swiotlb_bus_to_phys(dma_addr_t address);
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extern int swiotlb_arch_range_needs_mapping(void *ptr, size_t size);
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extern void
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*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
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dma_addr_t *dma_handle, gfp_t flags);
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extern void
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swiotlb_free_coherent(struct device *hwdev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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extern dma_addr_t
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swiotlb_map_single(struct device *hwdev, void *ptr, size_t size, int dir);
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extern void
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swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,
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size_t size, int dir);
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extern dma_addr_t
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swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
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int dir, struct dma_attrs *attrs);
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extern void
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swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
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size_t size, int dir, struct dma_attrs *attrs);
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extern int
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swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,
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int direction);
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extern void
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swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
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int direction);
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extern int
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swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
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int dir, struct dma_attrs *attrs);
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extern void
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swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
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int nelems, int dir, struct dma_attrs *attrs);
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extern void
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swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
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size_t size, int dir);
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extern void
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swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
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int nelems, int dir);
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extern void
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swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
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size_t size, int dir);
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extern void
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swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
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int nelems, int dir);
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extern void
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swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
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unsigned long offset, size_t size, int dir);
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extern void
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swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,
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unsigned long offset, size_t size,
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int dir);
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extern int
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swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
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extern int
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swiotlb_dma_supported(struct device *hwdev, u64 mask);
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#endif /* __LINUX_SWIOTLB_H */
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