36 lines
991 B
C
36 lines
991 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright(c) 2024 Huawei Technologies Co., Ltd */
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#ifndef RDMA_BITMAP_H
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#define RDMA_BITMAP_H
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#include <linux/spinlock.h>
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#ifndef RDMA_INVALID_INDEX
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#define RDMA_INVALID_INDEX 0xFFFFFFFF
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#endif
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#define ROCE_BITMAP_ROUNDUP_POW_OF_TWO(n) roundup_pow_of_two(n) /*lint +e866 +e587*/
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struct rdma_bitmap {
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u32 last; /* bottom of available id */
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u32 top; /* top value of non zone of id */
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u32 max_num; /* max id num */
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u32 reserved_top; /* unavailable top num */
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u32 mask; /* mask of id */
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u32 avail; /* num of available id */
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spinlock_t lock; /* spinlock of bitmap */
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unsigned long *table; /* memory of bitmap */
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};
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u32 rdma_bitmap_alloc(struct rdma_bitmap *bitmap);
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void rdma_bitmap_free(struct rdma_bitmap *bitmap, u32 index);
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int rdma_bitmap_init(struct rdma_bitmap *bitmap, u32 num, u32 mask,
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u32 reserved_bot, u32 reserved_top);
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void rdma_bitmap_cleanup(struct rdma_bitmap *bitmap);
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#endif // __RDMA_BITMAP_H__
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