forked from luck/tmp_suning_uos_patched
61690d01db
The original function returns unsigned long and 0 on failure.
Fixes: 4a35339958 ("RDMA/umem: Add API to find best driver supported page size in an MR")
Link: https://lore.kernel.org/r/0-v1-982a13cc5c6d+501ae-fix_best_pgsz_stub_jgg@nvidia.com
Reviewed-by: Gal Pressman <galpress@amazon.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2007 Cisco Systems. All rights reserved.
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*/
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#ifndef IB_UMEM_H
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#define IB_UMEM_H
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#include <linux/list.h>
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#include <linux/scatterlist.h>
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#include <linux/workqueue.h>
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#include <rdma/ib_verbs.h>
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struct ib_ucontext;
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struct ib_umem_odp;
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struct ib_umem {
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struct ib_device *ibdev;
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struct mm_struct *owning_mm;
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size_t length;
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unsigned long address;
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u32 writable : 1;
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u32 is_odp : 1;
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struct work_struct work;
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struct sg_table sg_head;
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int nmap;
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unsigned int sg_nents;
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};
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/* Returns the offset of the umem start relative to the first page. */
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static inline int ib_umem_offset(struct ib_umem *umem)
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{
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return umem->address & ~PAGE_MASK;
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}
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static inline size_t ib_umem_num_pages(struct ib_umem *umem)
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{
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return (ALIGN(umem->address + umem->length, PAGE_SIZE) -
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ALIGN_DOWN(umem->address, PAGE_SIZE)) >>
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PAGE_SHIFT;
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}
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#ifdef CONFIG_INFINIBAND_USER_MEM
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struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
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size_t size, int access);
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void ib_umem_release(struct ib_umem *umem);
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int ib_umem_page_count(struct ib_umem *umem);
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int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
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size_t length);
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unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
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unsigned long pgsz_bitmap,
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unsigned long virt);
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#else /* CONFIG_INFINIBAND_USER_MEM */
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#include <linux/err.h>
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static inline struct ib_umem *ib_umem_get(struct ib_device *device,
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unsigned long addr, size_t size,
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int access)
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{
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return ERR_PTR(-EINVAL);
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}
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static inline void ib_umem_release(struct ib_umem *umem) { }
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static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
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static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
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size_t length) {
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return -EINVAL;
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}
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static inline unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
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unsigned long pgsz_bitmap,
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unsigned long virt)
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{
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return 0;
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}
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#endif /* CONFIG_INFINIBAND_USER_MEM */
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#endif /* IB_UMEM_H */
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