75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
/*
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* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __GDRAPI_INTERNAL_H__
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#define __GDRAPI_INTERNAL_H__
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#include <stdint.h> // for standard [u]intX_t types
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#include <stddef.h>
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#include <sys/queue.h>
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#include "gdrapi.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef unlikely
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#ifdef __GNUC__
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#else
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#define unlikely(x) (x)
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#endif
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#endif
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#ifndef ACCESS_ONCE
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#define ACCESS_ONCE(x) (*(volatile typeof((x)) *)&(x))
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#endif
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#ifndef READ_ONCE
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#define READ_ONCE(x) ACCESS_ONCE(x)
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#endif
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#ifndef WRITE_ONCE
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#define WRITE_ONCE(x, v) (ACCESS_ONCE(x) = (v))
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#endif
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typedef struct gdr_memh_t {
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uint32_t handle;
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LIST_ENTRY(gdr_memh_t) entries;
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gdr_mapping_type_t mapping_type;
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} gdr_memh_t;
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struct gdr {
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int fd;
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LIST_HEAD(memh_list, gdr_memh_t) memhs;
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size_t page_size;
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size_t page_mask;
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uint8_t page_shift;
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uint32_t gdrdrv_version;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif // __GDRAPI_INTERNAL_H__
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