718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
218 lines
7.5 KiB
C
218 lines
7.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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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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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/**
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* @file
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*
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* @brief This file contains the protected interface structures, constants,
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* and methods for the SCIF_SAS_STP_REMOTE_DEVICE object.
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*/
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#include <dev/isci/scil/scif_sas_stp_remote_device.h>
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#include <dev/isci/scil/scif_sas_remote_device.h>
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#include <dev/isci/scil/scif_sas_domain.h>
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#include <dev/isci/scil/scif_sas_controller.h>
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#include <dev/isci/scil/scif_sas_logger.h>
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#include <dev/isci/scil/intel_sat.h>
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/**
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* @brief This method performs SATA/STP specific construction of the
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* STP remote device object.
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*
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* @param[in] device This parameter specifies the STP remote device
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* object to be constructed.
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*
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* @return none
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*/
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void scif_sas_stp_remote_device_construct(
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SCIF_SAS_REMOTE_DEVICE_T * device
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)
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{
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sati_device_construct(
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&device->protocol_device.stp_device.sati_device,
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device->domain->controller->user_parameters.sas.is_sata_ncq_enabled,
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(U8) device->domain->controller->user_parameters.sas.max_ncq_depth,
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device->domain->controller->user_parameters.sas.ignore_fua
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);
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device->protocol_device.stp_device.s_active = 0;
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}
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/**
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* @brief This method attempts to allocate a valid NCQ tag from the list
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* of available tags in the remote device.
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*
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* @todo Attempt to find a CLZ like instruction to optimize this routine
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* down into a few instructions. I know there is one like it for IA.
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*
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* @param[in] fw_device This parameter specifies the remote device
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* for which to allocate an available NCQ tag.
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*
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* @return Return an available NCQ tag.
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* @retval 0-31 These values indicate an available tag was successfully
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* allocated.
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* @return SCIF_SAS_STP_INVALID_NCQ_TAG This value indicates that there are
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* no available NCQ tags.
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*/
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U8 scif_sas_stp_remote_device_allocate_ncq_tag(
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SCIF_SAS_REMOTE_DEVICE_T * fw_device
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)
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{
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U8 ncq_tag = 0;
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U32 tag_mask = 1;
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SCIF_LOG_TRACE((
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sci_base_object_get_logger(fw_device),
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SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
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"scif_sas_stp_remote_device_allocate_ncq_tag(0x%x)\n",
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fw_device
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));
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// Try to find an unused NCQ tag.
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while ( (fw_device->protocol_device.stp_device.s_active & tag_mask)
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&& (ncq_tag < fw_device->protocol_device.stp_device.sati_device.ncq_depth) )
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{
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tag_mask <<= 1;
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ncq_tag++;
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}
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// Check to see if we were able to find an available NCQ tag.
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if (ncq_tag < fw_device->protocol_device.stp_device.sati_device.ncq_depth)
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{
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SCIF_LOG_INFO((
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sci_base_object_get_logger(fw_device),
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SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
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"RemoteDevice:0x%x NcqTag:0x%x successful NCQ TAG allocation\n",
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fw_device, ncq_tag
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));
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fw_device->protocol_device.stp_device.s_active |= tag_mask;
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return ncq_tag;
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}
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SCIF_LOG_INFO((
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sci_base_object_get_logger(fw_device),
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SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
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"RemoteDevice:0x%x unable to allocate NCQ TAG\n",
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fw_device
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));
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// All NCQ tags are in use.
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return SCIF_SAS_INVALID_NCQ_TAG;
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}
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/**
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* @brief This method removes the specified tag from the list of
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* outstanding tags. It doesn't return any values.
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*
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* @param[in] fw_device This parameter specifies the remote device for
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* which to free an NCQ tag.
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* @param[in] ncq_tag This parameter specifies the NCQ tag that is
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* to be freed.
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*
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* @return none
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*/
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void scif_sas_stp_remote_device_free_ncq_tag(
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struct SCIF_SAS_REMOTE_DEVICE * fw_device,
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U8 ncq_tag
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)
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{
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SCIF_LOG_INFO((
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sci_base_object_get_logger(fw_device),
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SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
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"RemoteDevice:0x%x NcqTag:0x%x freeing NCQ TAG\n",
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fw_device, ncq_tag
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));
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fw_device->protocol_device.stp_device.s_active &= ~(1 << ncq_tag);
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}
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struct SCIF_SAS_REQUEST *
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scif_sas_stp_remote_device_get_request_by_ncq_tag(
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struct SCIF_SAS_REMOTE_DEVICE * fw_device,
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U8 ncq_tag
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)
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{
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SCIF_SAS_DOMAIN_T * fw_domain = fw_device->domain;
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SCI_FAST_LIST_ELEMENT_T * pending_request_element;
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SCIF_SAS_REQUEST_T * pending_request = NULL;
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SCIF_SAS_REQUEST_T * matching_request = NULL;
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pending_request_element = fw_domain->request_list.list_head;
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while (pending_request_element != NULL)
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{
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pending_request =
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(SCIF_SAS_REQUEST_T*) sci_fast_list_get_object(pending_request_element);
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// The current element may be deleted from the list because of
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// IO completion so advance to the next element early
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pending_request_element = sci_fast_list_get_next(pending_request_element);
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if (
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(pending_request->device == fw_device) &&
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(pending_request->stp.sequence.protocol == SAT_PROTOCOL_FPDMA) &&
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(pending_request->stp.ncq_tag == ncq_tag)
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)
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{
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matching_request = pending_request;
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}
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}
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return matching_request;
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}
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