3272320c73
The previous method for registering I/O queues did not allow the user to specify queue priority for weighted round robin arbitration, and it limited the application to one queue per controller per thread. Change the API to require explicit allocation of each queue for each controller using the new function spdk_nvme_ctrlr_alloc_io_qpair(). Each function that submits a command on an I/O queue now takes an explicit qpair parameter rather than implicitly using the thread-local queue. This also allows the application to allocate different numbers of threads per controller; previously, the number of queues was capped at the smallest value supported by any attached controller. Weighted round robin arbitration is not supported yet; additional changes to the controller startup process are required to enable alternate arbitration methods. Change-Id: Ia33be1050a6953bc5a3cca9284aefcd95b01116e Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
/*-
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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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/*!
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\mainpage SPDK Userspace NVMe Driver
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\section interface Public Interface
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- spdk/nvme.h
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\section key_functions Key Functions
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- spdk_nvme_probe() \copybrief spdk_nvme_probe()
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- spdk_nvme_ns_cmd_read() \copybrief spdk_nvme_ns_cmd_read()
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- spdk_nvme_ns_cmd_write() \copybrief spdk_nvme_ns_cmd_write()
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- spdk_nvme_ns_cmd_deallocate() \copybrief spdk_nvme_ns_cmd_deallocate()
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- spdk_nvme_ns_cmd_flush() \copybrief spdk_nvme_ns_cmd_flush()
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- spdk_nvme_qpair_process_completions() \copybrief spdk_nvme_qpair_process_completions()
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\section key_concepts Key Concepts
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- \ref nvme_driver_integration
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- \ref nvme_initialization
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- \ref nvme_io_submission
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- \ref nvme_async_completion
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*/
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