0babf8ce81
bdev and copy modules no longer have check_io functions now - all polling is done via pollers registered when I/O channels are created. Other default resources are also removed - for example, a qpair is no longer allocated and assigned per bdev exposed by the nvme driver - the qpairs are only allocated via I/O channels. Similar principle also applies to the aio driver. ioat channels are no longer allocated and assigned to lcores - they are dynamically allocated and assigned to I/O channels when needed. If no ioat channel is available for an I/O channel, the copy engine framework will revert to using memcpy/memset instead. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I99435a75fe792a2b91ab08f25962dfd407d6402f
110 lines
4.1 KiB
C
110 lines
4.1 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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* Memory copy offload engine abstraction layer
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*/
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#ifndef SPDK_COPY_ENGINE_H
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#define SPDK_COPY_ENGINE_H
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#include <stdio.h>
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#include <stdint.h>
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#include "spdk/queue.h"
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typedef void (*copy_completion_cb)(void *ref, int status);
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struct spdk_io_channel;
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struct copy_task {
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copy_completion_cb cb;
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uint8_t offload_ctx[0];
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};
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struct spdk_copy_engine {
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int64_t (*copy)(void *cb_arg, struct spdk_io_channel *ch, void *dst, void *src,
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uint64_t nbytes, copy_completion_cb cb);
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int64_t (*fill)(void *cb_arg, struct spdk_io_channel *ch, void *dst, uint8_t fill,
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uint64_t nbytes, copy_completion_cb cb);
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struct spdk_io_channel *(*get_io_channel)(uint32_t priority);
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};
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struct spdk_copy_module_if {
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/** Initialization function for the module. Called by the spdk
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* application during startup.
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*
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* Modules are required to define this function.
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*/
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int (*module_init)(void);
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/** Finish function for the module. Called by the spdk application
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* before the spdk application exits to perform any necessary cleanup.
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*
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* Modules are not required to define this function.
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*/
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void (*module_fini)(void);
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/** Function called to return a text string representing the
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* module's configuration options for inclusion in an
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* spdk configuration file.
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*/
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void (*config_text)(FILE *fp);
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int (*get_ctx_size)(void);
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TAILQ_ENTRY(spdk_copy_module_if) tailq;
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};
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void spdk_copy_engine_register(struct spdk_copy_engine *copy_engine);
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struct spdk_io_channel *spdk_copy_engine_get_io_channel(uint32_t priority);
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int64_t spdk_copy_submit(struct copy_task *copy_req, struct spdk_io_channel *ch, void *dst,
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void *src, uint64_t nbytes, copy_completion_cb cb);
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int64_t spdk_copy_submit_fill(struct copy_task *copy_req, struct spdk_io_channel *ch, void *dst,
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uint8_t fill, uint64_t nbytes, copy_completion_cb cb);
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int spdk_copy_module_get_max_ctx_size(void);
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void spdk_copy_module_list_add(struct spdk_copy_module_if *copy_module);
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#define SPDK_COPY_MODULE_REGISTER(init_fn, fini_fn, config_fn, ctx_size_fn) \
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static struct spdk_copy_module_if init_fn ## _if = { \
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.module_init = init_fn, \
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.module_fini = fini_fn, \
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.config_text = config_fn, \
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.get_ctx_size = ctx_size_fn, \
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}; \
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__attribute__((constructor)) static void init_fn ## _init(void) \
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{ \
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spdk_copy_module_list_add(&init_fn ## _if); \
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}
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#endif
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