#ifndef IB_UMEM_H
#define IB_UMEM_H
#include <linux/list.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
#include <rdma/ib_verbs.h>
struct ib_ucontext;
struct ib_umem_odp;
struct dma_buf_attach_ops;
struct ib_umem { … };
struct ib_umem_dmabuf { … };
static inline struct ib_umem_dmabuf *to_ib_umem_dmabuf(struct ib_umem *umem)
{ … }
static inline int ib_umem_offset(struct ib_umem *umem)
{ … }
static inline unsigned long ib_umem_dma_offset(struct ib_umem *umem,
unsigned long pgsz)
{ … }
static inline size_t ib_umem_num_dma_blocks(struct ib_umem *umem,
unsigned long pgsz)
{ … }
static inline size_t ib_umem_num_pages(struct ib_umem *umem)
{ … }
static inline void __rdma_umem_block_iter_start(struct ib_block_iter *biter,
struct ib_umem *umem,
unsigned long pgsz)
{ … }
static inline bool __rdma_umem_block_iter_next(struct ib_block_iter *biter)
{ … }
#define rdma_umem_for_each_dma_block(umem, biter, pgsz) …
#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);
static inline unsigned long ib_umem_find_best_pgoff(struct ib_umem *umem,
unsigned long pgsz_bitmap,
u64 pgoff_bitmask)
{ … }
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);
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);
#else
#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 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) { }
#endif
#endif