forked from luck/tmp_suning_uos_patched
6bf9d8f6f0
The header files in RDMA subsystem are dual licensed and can be described by simple SPDX tag, so replace all of them at once together with making them use the same coding style for header guard defines. Link: https://lore.kernel.org/r/20200719072521.135260-1-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
|
|
/*
|
|
* Copyright (c) 2007 Cisco Systems. All rights reserved.
|
|
*/
|
|
|
|
#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 ib_umem {
|
|
struct ib_device *ibdev;
|
|
struct mm_struct *owning_mm;
|
|
size_t length;
|
|
unsigned long address;
|
|
u32 writable : 1;
|
|
u32 is_odp : 1;
|
|
struct work_struct work;
|
|
struct sg_table sg_head;
|
|
int nmap;
|
|
unsigned int sg_nents;
|
|
};
|
|
|
|
/* 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 size_t ib_umem_num_pages(struct ib_umem *umem)
|
|
{
|
|
return (ALIGN(umem->address + umem->length, PAGE_SIZE) -
|
|
ALIGN_DOWN(umem->address, PAGE_SIZE)) >>
|
|
PAGE_SHIFT;
|
|
}
|
|
|
|
#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_page_count(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);
|
|
|
|
#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(-EINVAL);
|
|
}
|
|
static inline void ib_umem_release(struct ib_umem *umem) { }
|
|
static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
|
|
static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
|
|
size_t length) {
|
|
return -EINVAL;
|
|
}
|
|
static inline int ib_umem_find_best_pgsz(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
unsigned long virt) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
#endif /* CONFIG_INFINIBAND_USER_MEM */
|
|
|
|
#endif /* IB_UMEM_H */
|