forked from luck/tmp_suning_uos_patched
81655d3c4a
For the calls linked to mlx4_ib_umem_calc_optimal_mtt_size() use ib_umem_num_dma_blocks() inside the function, it is just some weird static default. All other places are just using it with PAGE_SIZE, switch to ib_umem_num_dma_blocks(). As this is the last call site, remove ib_umem_num_count(). Link: https://lore.kernel.org/r/15-v2-270386b7e60b+28f4-umem_1_jgg@nvidia.com Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
108 lines
2.9 KiB
C
108 lines
2.9 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;
|
|
u64 iova;
|
|
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_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);
|
|
}
|
|
|
|
static inline void __rdma_umem_block_iter_start(struct ib_block_iter *biter,
|
|
struct ib_umem *umem,
|
|
unsigned long pgsz)
|
|
{
|
|
__rdma_block_iter_start(biter, umem->sg_head.sgl, umem->nmap, pgsz);
|
|
}
|
|
|
|
/**
|
|
* rdma_umem_for_each_dma_block - iterate over contiguous DMA blocks of the umem
|
|
* @umem: umem to iterate over
|
|
* @pgsz: Page size to split the list into
|
|
*
|
|
* pgsz must be <= PAGE_SIZE or computed by ib_umem_find_best_pgsz(). The
|
|
* returned DMA blocks will be aligned to pgsz and span the range:
|
|
* ALIGN_DOWN(umem->address, pgsz) to ALIGN(umem->address + umem->length, pgsz)
|
|
*
|
|
* Performs exactly ib_umem_num_dma_blocks() iterations.
|
|
*/
|
|
#define rdma_umem_for_each_dma_block(umem, biter, pgsz) \
|
|
for (__rdma_umem_block_iter_start(biter, umem, pgsz); \
|
|
__rdma_block_iter_next(biter);)
|
|
|
|
#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);
|
|
|
|
#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_copy_from(void *dst, struct ib_umem *umem, size_t offset,
|
|
size_t length) {
|
|
return -EINVAL;
|
|
}
|
|
static inline unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
|
|
unsigned long pgsz_bitmap,
|
|
unsigned long virt)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_INFINIBAND_USER_MEM */
|
|
|
|
#endif /* IB_UMEM_H */
|