45ba8d5d06
Several fixes, most notably fix for virtio on swiotlb systems. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> -----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJcf/Y0AAoJECgfDbjSjVRpzC8H/RG46PnIpTe69jcuaM3zv7es Tr2GLl65wPV5AZBGMlRjXEoOt6JknWamROhZL7hJ0/17XX4x1mmEQb9mxweE/TDy yDiNueni+NdFEptzQOoVjZahPXDaGYjuXH+wCvmCscg6N7iSXWqpKG08m+yr3ATF NBNvB693FLy7B60v4IIHlsYTqoKFeWPYRvE+HIaapTpENodTAjetGpXDIYJhCTRc 6Yh6uNOYlF7XV8gbYzh4U9IcptrLO4Wv1xcEFMbgUoBeHwEMMpO6pLUFgDZttq0v eT7lxu5Wg73hACOEdS1fb9HREXa4jm3Iu4qgLxEDeze8Y/AqlUdd8CJGBSFC32A= =1bSe -----END PGP SIGNATURE----- Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost Pull virtio updates from Michael Tsirkin: "Several fixes, most notably fix for virtio on swiotlb systems" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: silence an unused-variable warning virtio: hint if callbacks surprisingly might sleep virtio-ccw: wire up ->bus_name callback s390/virtio: handle find on invalid queue gracefully virtio-ccw: diag 500 may return a negative cookie virtio_balloon: remove the unnecessary 0-initialization virtio-balloon: improve update_balloon_size_func virtio-blk: Consider virtio_max_dma_size() for maximum segment size virtio: Introduce virtio_max_dma_size() dma: Introduce dma_max_mapping_size() swiotlb: Add is_swiotlb_active() function swiotlb: Introduce swiotlb_max_mapping_size()
112 lines
2.9 KiB
C
112 lines
2.9 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 */
|
|
};
|
|
|
|
/*
|
|
* 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,
|
|
};
|
|
|
|
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);
|
|
|
|
#ifdef CONFIG_SWIOTLB
|
|
extern enum swiotlb_force swiotlb_force;
|
|
extern phys_addr_t io_tlb_start, io_tlb_end;
|
|
|
|
static inline bool is_swiotlb_buffer(phys_addr_t paddr)
|
|
{
|
|
return paddr >= io_tlb_start && paddr < io_tlb_end;
|
|
}
|
|
|
|
bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs);
|
|
void __init swiotlb_exit(void);
|
|
unsigned int swiotlb_max_segment(void);
|
|
size_t swiotlb_max_mapping_size(struct device *dev);
|
|
bool is_swiotlb_active(void);
|
|
#else
|
|
#define swiotlb_force SWIOTLB_NO_FORCE
|
|
static inline bool is_swiotlb_buffer(phys_addr_t paddr)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool swiotlb_map(struct device *dev, phys_addr_t *phys,
|
|
dma_addr_t *dma_addr, size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
return false;
|
|
}
|
|
static inline void swiotlb_exit(void)
|
|
{
|
|
}
|
|
static inline unsigned int swiotlb_max_segment(void)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline size_t swiotlb_max_mapping_size(struct device *dev)
|
|
{
|
|
return SIZE_MAX;
|
|
}
|
|
|
|
static inline bool is_swiotlb_active(void)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_SWIOTLB */
|
|
|
|
extern void swiotlb_print_info(void);
|
|
extern void swiotlb_set_max_segment(unsigned int);
|
|
|
|
#endif /* __LINUX_SWIOTLB_H */
|