396c445cb1
We will use this in a future patch to determine whether it's safe to use DPDK allocated memory when allocating new 1gb page entries. We could use it in this patch to decide whether or not to register the memory hotplug handler, but there's really no harm registering it even when it's not needed. Ideally DPDK would provide some kind of API to query how DPDK was configured. In the normal case we know whether legacy-mem was specified, but if users initialize DPDK themselves and then call spdk_env_dpdk_post_init(), we won't know if legacy-mem was specified. So in that case, we will just assume that it wasn't specified. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: Ied0e5ff777c8ee651043f46a37ce62e44bfcc5fe Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/477086 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: SPDK CI Jenkins <sys_sgci@intel.com>
78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* Encapsulated DPDK specific dependencies
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*/
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#ifndef SPDK_ENV_DPDK_H
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#define SPDK_ENV_DPDK_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Initialize the environment library after DPDK env is already initialized.
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* If DPDK's rte_eal_init is already called, this function must be called
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* instead of spdk_env_init, prior to using any other functions in SPDK
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* env library.
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*
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* \param legacy_mem Indicates whether DPDK was initialized with --legacy-mem
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* eal parameter.
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* \return 0 on success, or negative errno on failure.
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*/
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int spdk_env_dpdk_post_init(bool legacy_mem);
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/**
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* Release any resources of the environment library that were alllocated with
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* spdk_env_dpdk_post_init(). After this call, no DPDK function calls may
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* be made. It is expected that common usage of this function is to call it
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* just before terminating the process.
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*/
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void spdk_env_dpdk_post_fini(void);
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/**
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* Check if DPDK was initialized external to the SPDK env_dpdk library.
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*
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* \return true if DPDK was initialized external to the SPDK env_dpdk library.
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* \return false otherwise
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*/
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bool spdk_env_dpdk_external_init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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