mirror of
https://github.com/torvalds/linux.git
synced 2026-05-12 16:18:45 +02:00
179b320958
The DMA API expects that mapping and unmapping use the same DMA
attributes. The RDMA umem code did not meet this requirement, so fix
the mismatch.
Fixes: f03d9fadfe ("RDMA/core: Add weak ordering dma attr to dma mapping")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
235 lines
7.1 KiB
C
235 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
|
|
/*
|
|
* Copyright (c) 2007 Cisco Systems. All rights reserved.
|
|
* Copyright (c) 2020 Intel Corporation. All rights reserved.
|
|
*/
|
|
|
|
#ifndef IB_UMEM_H
|
|
#define IB_UMEM_H
|
|
|
|
#include <linux/scatterlist.h>
|
|
|
|
struct ib_device;
|
|
struct dma_buf_attach_ops;
|
|
|
|
struct ib_umem {
|
|
struct ib_device *ibdev;
|
|
struct mm_struct *owning_mm;
|
|
u64 iova;
|
|
size_t length;
|
|
unsigned long address;
|
|
unsigned long dma_attrs;
|
|
u32 writable : 1;
|
|
u32 is_odp : 1;
|
|
u32 is_dmabuf : 1;
|
|
struct sg_append_table sgt_append;
|
|
};
|
|
|
|
struct ib_umem_dmabuf {
|
|
struct ib_umem umem;
|
|
struct dma_buf_attachment *attach;
|
|
struct sg_table *sgt;
|
|
struct scatterlist *first_sg;
|
|
struct scatterlist *last_sg;
|
|
unsigned long first_sg_offset;
|
|
unsigned long last_sg_trim;
|
|
void (*pinned_revoke)(void *priv);
|
|
void *private;
|
|
u8 pinned : 1;
|
|
u8 revoked : 1;
|
|
};
|
|
|
|
static inline struct ib_umem_dmabuf *to_ib_umem_dmabuf(struct ib_umem *umem)
|
|
{
|
|
return container_of(umem, struct ib_umem_dmabuf, umem);
|
|
}
|
|
|
|
/* Returns the offset of the umem start relative to the first page. */
|
|
static inline int ib_umem_offset(struct ib_umem *umem)
|
|
{
|
|
return umem->address & ~PAGE_MASK;
|
|
}
|
|
|
|
static inline dma_addr_t ib_umem_start_dma_addr(struct ib_umem *umem)
|
|
{
|
|
return sg_dma_address(umem->sgt_append.sgt.sgl) + ib_umem_offset(umem);
|
|
}
|
|
|
|
static inline unsigned long ib_umem_dma_offset(struct ib_umem *umem,
|
|
unsigned long pgsz)
|
|
{
|
|
return ib_umem_start_dma_addr(umem) & (pgsz - 1);
|
|
}
|
|
|
|
static inline size_t ib_umem_num_dma_blocks(struct ib_umem *umem,
|
|
unsigned long pgsz)
|
|
{
|
|
return (size_t)((ALIGN(umem->iova + umem->length, pgsz) -
|
|
ALIGN_DOWN(umem->iova, pgsz))) /
|
|
pgsz;
|
|
}
|
|
|
|
static inline size_t ib_umem_num_pages(struct ib_umem *umem)
|
|
{
|
|
return ib_umem_num_dma_blocks(umem, PAGE_SIZE);
|
|
}
|
|
#ifdef CONFIG_INFINIBAND_USER_MEM
|
|
|
|
struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
|
|
size_t size, int access);
|
|
void ib_umem_release(struct ib_umem *umem);
|
|
int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
|
|
size_t length);
|
|
unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
unsigned long virt);
|
|
|
|
/**
|
|
* ib_umem_find_best_pgoff - Find best HW page size
|
|
*
|
|
* @umem: umem struct
|
|
* @pgsz_bitmap: bitmap of HW supported page sizes
|
|
* @pgoff_bitmask: Mask of bits that can be represented with an offset
|
|
*
|
|
* This is very similar to ib_umem_find_best_pgsz() except instead of accepting
|
|
* an IOVA it accepts a bitmask specifying what address bits can be represented
|
|
* with a page offset.
|
|
*
|
|
* For instance if the HW has multiple page sizes, requires 64 byte alignemnt,
|
|
* and can support aligned offsets up to 4032 then pgoff_bitmask would be
|
|
* "111111000000".
|
|
*
|
|
* If the pgoff_bitmask requires either alignment in the low bit or an
|
|
* unavailable page size for the high bits, this function returns 0.
|
|
*
|
|
* Returns: best HW page size for the parameters or 0 if none available
|
|
* for the given parameters.
|
|
*/
|
|
static inline unsigned long ib_umem_find_best_pgoff(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
u64 pgoff_bitmask)
|
|
{
|
|
dma_addr_t dma_addr;
|
|
|
|
dma_addr = ib_umem_start_dma_addr(umem);
|
|
return ib_umem_find_best_pgsz(umem, pgsz_bitmap,
|
|
dma_addr & pgoff_bitmask);
|
|
}
|
|
|
|
static inline bool ib_umem_is_contiguous(struct ib_umem *umem)
|
|
{
|
|
dma_addr_t dma_addr;
|
|
unsigned long pgsz;
|
|
|
|
/*
|
|
* Select the smallest aligned page that can contain the whole umem if
|
|
* it was contiguous.
|
|
*/
|
|
dma_addr = ib_umem_start_dma_addr(umem);
|
|
pgsz = roundup_pow_of_two((dma_addr ^ (umem->length - 1 + dma_addr)) + 1);
|
|
return !!ib_umem_find_best_pgoff(umem, pgsz, U64_MAX);
|
|
}
|
|
|
|
struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
|
|
unsigned long offset, size_t size,
|
|
int fd, int access,
|
|
const struct dma_buf_attach_ops *ops);
|
|
struct ib_umem_dmabuf *ib_umem_dmabuf_get_pinned(struct ib_device *device,
|
|
unsigned long offset,
|
|
size_t size, int fd,
|
|
int access);
|
|
struct ib_umem_dmabuf *
|
|
ib_umem_dmabuf_get_pinned_revocable_and_lock(struct ib_device *device,
|
|
unsigned long offset, size_t size,
|
|
int fd, int access);
|
|
void ib_umem_dmabuf_set_revoke_locked(struct ib_umem_dmabuf *umem_dmabuf,
|
|
void (*revoke)(void *priv), void *priv);
|
|
struct ib_umem_dmabuf *
|
|
ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device,
|
|
struct device *dma_device,
|
|
unsigned long offset, size_t size,
|
|
int fd, int access);
|
|
int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf);
|
|
void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf);
|
|
void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf);
|
|
void ib_umem_dmabuf_revoke_lock(struct ib_umem_dmabuf *umem_dmabuf);
|
|
void ib_umem_dmabuf_revoke_unlock(struct ib_umem_dmabuf *umem_dmabuf);
|
|
void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf);
|
|
|
|
#else /* CONFIG_INFINIBAND_USER_MEM */
|
|
|
|
#include <linux/err.h>
|
|
|
|
static inline struct ib_umem *ib_umem_get(struct ib_device *device,
|
|
unsigned long addr, size_t size,
|
|
int access)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
static inline void ib_umem_release(struct ib_umem *umem) { }
|
|
static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
|
|
size_t length) {
|
|
return -EOPNOTSUPP;
|
|
}
|
|
static inline unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
unsigned long virt)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline unsigned long ib_umem_find_best_pgoff(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
u64 pgoff_bitmask)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline
|
|
struct ib_umem_dmabuf *ib_umem_dmabuf_get(struct ib_device *device,
|
|
unsigned long offset,
|
|
size_t size, int fd,
|
|
int access,
|
|
struct dma_buf_attach_ops *ops)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
static inline struct ib_umem_dmabuf *
|
|
ib_umem_dmabuf_get_pinned(struct ib_device *device, unsigned long offset,
|
|
size_t size, int fd, int access)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
static inline struct ib_umem_dmabuf *
|
|
ib_umem_dmabuf_get_pinned_revocable_and_lock(struct ib_device *device,
|
|
unsigned long offset, size_t size,
|
|
int fd, int access)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
static inline void
|
|
ib_umem_dmabuf_set_revoke_locked(struct ib_umem_dmabuf *umem_dmabuf,
|
|
void (*revoke)(void *priv), void *priv) {}
|
|
|
|
static inline struct ib_umem_dmabuf *
|
|
ib_umem_dmabuf_get_pinned_with_dma_device(struct ib_device *device,
|
|
struct device *dma_device,
|
|
unsigned long offset, size_t size,
|
|
int fd, int access)
|
|
{
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
}
|
|
|
|
static inline int ib_umem_dmabuf_map_pages(struct ib_umem_dmabuf *umem_dmabuf)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
static inline void ib_umem_dmabuf_unmap_pages(struct ib_umem_dmabuf *umem_dmabuf) { }
|
|
static inline void ib_umem_dmabuf_release(struct ib_umem_dmabuf *umem_dmabuf) { }
|
|
static inline void ib_umem_dmabuf_revoke_lock(struct ib_umem_dmabuf *umem_dmabuf) {}
|
|
static inline void ib_umem_dmabuf_revoke_unlock(struct ib_umem_dmabuf *umem_dmabuf) {}
|
|
static inline void ib_umem_dmabuf_revoke(struct ib_umem_dmabuf *umem_dmabuf) {}
|
|
|
|
#endif /* CONFIG_INFINIBAND_USER_MEM */
|
|
#endif /* IB_UMEM_H */
|