mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 02:06:43 +07:00
16e73adbca
Unused now that everyone uses swiotlb_{alloc,free}().
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20180319103826.12853-15-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_SWIOTLB_H
|
|
#define __LINUX_SWIOTLB_H
|
|
|
|
#include <linux/dma-direction.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
|
|
struct device;
|
|
struct page;
|
|
struct scatterlist;
|
|
|
|
enum swiotlb_force {
|
|
SWIOTLB_NORMAL, /* Default - depending on HW DMA mask etc. */
|
|
SWIOTLB_FORCE, /* swiotlb=force */
|
|
SWIOTLB_NO_FORCE, /* swiotlb=noforce */
|
|
};
|
|
|
|
extern enum swiotlb_force 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);
|
|
extern void __init swiotlb_update_mem_attributes(void);
|
|
|
|
/*
|
|
* 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,
|
|
unsigned long attrs);
|
|
|
|
extern void swiotlb_tbl_unmap_single(struct device *hwdev,
|
|
phys_addr_t tlb_addr,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
|
|
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. */
|
|
|
|
void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
|
|
gfp_t flags, unsigned long attrs);
|
|
void swiotlb_free(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_addr, unsigned long attrs);
|
|
|
|
extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
|
|
extern int
|
|
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
|
|
enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
|
|
extern void
|
|
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
|
|
int nelems, enum dma_data_direction dir,
|
|
unsigned long 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_exit(void);
|
|
unsigned int swiotlb_max_segment(void);
|
|
#else
|
|
static inline void swiotlb_exit(void) { }
|
|
static inline unsigned int swiotlb_max_segment(void) { return 0; }
|
|
#endif
|
|
|
|
extern void swiotlb_print_info(void);
|
|
extern int is_swiotlb_buffer(phys_addr_t paddr);
|
|
extern void swiotlb_set_max_segment(unsigned int);
|
|
|
|
extern const struct dma_map_ops swiotlb_dma_ops;
|
|
|
|
#endif /* __LINUX_SWIOTLB_H */
|