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The isci driver is for the integrated SAS controller in the Intel C600 (Patsburg) chipset. Source files in sys/dev/isci directory are FreeBSD-specific, and sys/dev/isci/scil subdirectory contains an OS-agnostic library (SCIL) published by Intel to control the SAS controller. This library is used primarily as-is in this driver, with some post-processing to better integrate into the kernel build environment. isci.4 and a README in the sys/dev/isci directory contain a few additional details. This driver is only built for amd64 and i386 targets. Sponsored by: Intel Reviewed by: scottl Approved by: scottl
324 lines
12 KiB
C
324 lines
12 KiB
C
/*-
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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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* @brief This file contains the method implementations required to
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* translate the SCSI read (6, 10, 12, or 16-byte) commands.
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*/
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#include <dev/isci/scil/sati_move.h>
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#include <dev/isci/scil/sati_read.h>
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#include <dev/isci/scil/sati_callbacks.h>
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#include <dev/isci/scil/sati_util.h>
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#include <dev/isci/scil/intel_ata.h>
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#include <dev/isci/scil/intel_scsi.h>
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//******************************************************************************
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//* P R I V A T E M E T H O D S
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//******************************************************************************
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/**
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* @brief This method performs the common translation functionality for
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* all SCSI read operations that are 10 bytes in size or larger.
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* Translated/Written items include:
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* - Force Unit Access (FUA)
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* - Sector Count/Transfer Length
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* - Command register
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*
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* @param[in] sector_count This parameter specifies the number of sectors
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* to be transferred by this request.
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* @param[in] device_head This parameter points to device head register
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* that is to be written into the ATA task file (register FIS).
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*
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* @return Indicate if the command translation succeeded.
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* @see sati_move_set_sector_count() for additional return values.
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*/
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static
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SATI_STATUS sati_read_large_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io,
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U32 sector_count,
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U8 * device_head
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)
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{
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sequence->data_direction = SATI_DATA_DIRECTION_IN;
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return sati_move_large_translate_command(
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sequence,
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scsi_io,
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ata_io,
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sector_count,
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device_head
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);
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}
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/**
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* @brief This method performs the common translation functionality for
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* all SCSI read operations containing a 32-bit logical block
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* address.
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* Translated/Written items include:
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* - Logical Block Address (LBA)
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* - Force Unit Access (FUA)
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* - Sector Count/Transfer Length
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* - Command register
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* For more information on the parameters passed to this method,
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* please reference sati_translate_command().
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*
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* @param[in] sector_count This parameter specifies the number of sectors
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* to be transferred by this request.
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* @param[in] control_byte_offset This parameter specifies the byte offset
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* into the command descriptor block at which the control byte
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* is located.
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*
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* @return Indicate if the command translation succeeded.
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* @see sati_move_32_bit_lba_translate_command(), sati_move_set_sector_count()
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* for additional return values.
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*/
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static
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SATI_STATUS sati_read_32_bit_lba_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io,
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U32 sector_count,
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U8 control_byte_offset
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)
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{
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U8 device_head = 0;
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SATI_STATUS status;
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status = sati_read_large_translate_command(
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sequence, scsi_io, ata_io, sector_count, &device_head
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);
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if (status == SATI_SUCCESS)
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{
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status = sati_move_32_bit_lba_translate_command(
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sequence, scsi_io, ata_io, device_head
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);
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}
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return status;
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}
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//******************************************************************************
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//* P U B L I C M E T H O D S
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//******************************************************************************
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/**
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* @brief This method will translate the SCSI read command into a
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* corresponding ATA read 6 command. Depending upon the capabilities
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* supported by the target different ATA commands can be selected.
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* For more information on the parameters passed to this method,
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* please reference sati_translate_command().
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*
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* @return Indicate if the command translation succeeded.
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* @retval SCI_SUCCESS This is returned if the command translation was
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* successful.
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* @retval SATI_FAILURE_CHECK_RESPONSE_DATA This value is returned if
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* sense data has been created as a result of something specified
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* in the CDB.
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*/
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SATI_STATUS sati_read_6_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io
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)
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{
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if(sati_device_state_stopped(sequence, scsi_io))
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{
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return SATI_FAILURE_CHECK_RESPONSE_DATA;
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}
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else
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{
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sequence->data_direction = SATI_DATA_DIRECTION_IN;
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sequence->type = SATI_SEQUENCE_READ_6;
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return sati_move_small_translate_command(sequence, scsi_io, ata_io);
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}
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}
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/**
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* @brief This method will translate the SCSI read 10 command into a
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* corresponding ATA read command. Depending upon the capabilities
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* supported by the target different ATA commands can be selected.
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* It ensures that all translation required for this command is
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* performed successfully.
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* For more information on the parameters passed to this method,
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* please reference sati_translate_command().
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*
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* @return Indicate if the command translation succeeded.
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* @see sati_read_32_bit_lba_translate_command() for return values.
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*/
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SATI_STATUS sati_read_10_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io
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)
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{
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U8 * cdb = sati_cb_get_cdb_address(scsi_io);
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U32 sector_count = (sati_get_cdb_byte(cdb, 7) << 8) |
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(sati_get_cdb_byte(cdb, 8));
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if(sati_device_state_stopped(sequence, scsi_io))
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{
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return SATI_FAILURE_CHECK_RESPONSE_DATA;
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}
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else
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{
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sequence->type = SATI_SEQUENCE_READ_10;
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return sati_read_32_bit_lba_translate_command(
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sequence, scsi_io, ata_io, sector_count, 9
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);
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}
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}
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/**
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* @brief This method will translate the SCSI read 12 command into a
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* corresponding ATA read command. Depending upon the capabilities
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* supported by the target different ATA commands can be selected.
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* It ensures that all translation required for this command is
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* performed successfully.
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* For more information on the parameters passed to this method,
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* please reference sati_translate_command().
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*
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* @return Indicate if the command translation succeeded.
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* @see sati_read_32_bit_lba_translate_command() for return values.
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*/
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SATI_STATUS sati_read_12_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io
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)
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{
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U8 * cdb = sati_cb_get_cdb_address(scsi_io);
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U32 sector_count = (sati_get_cdb_byte(cdb, 6) << 24) |
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(sati_get_cdb_byte(cdb, 7) << 16) |
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(sati_get_cdb_byte(cdb, 8) << 8) |
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(sati_get_cdb_byte(cdb, 9));
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if(sati_device_state_stopped(sequence, scsi_io))
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{
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return SATI_FAILURE_CHECK_RESPONSE_DATA;
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}
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else
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{
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sequence->type = SATI_SEQUENCE_READ_12;
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return sati_read_32_bit_lba_translate_command(
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sequence, scsi_io, ata_io, sector_count, 11
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);
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}
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}
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/**
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* @brief This method will translate the SCSI read 16 command into a
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* corresponding ATA read command. Depending upon the capabilities
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* supported by the target different ATA commands can be selected.
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* It ensures that all translation required for this command is
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* performed successfully.
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* For more information on the parameters passed to this method,
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* please reference sati_translate_command().
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*
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* @return Indicate if the command translation succeeded.
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* @see sati_read_large_translate_command(), sati_move_translate_64_bit_lba()
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* for additional return values.
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*/
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SATI_STATUS sati_read_16_translate_command(
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SATI_TRANSLATOR_SEQUENCE_T * sequence,
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void * scsi_io,
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void * ata_io
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)
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{
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SATI_STATUS status;
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U8 device_head = 0;
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U8 * cdb = sati_cb_get_cdb_address(scsi_io);
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U32 sector_count = (sati_get_cdb_byte(cdb, 10) << 24) |
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(sati_get_cdb_byte(cdb, 11) << 16) |
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(sati_get_cdb_byte(cdb, 12) << 8) |
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(sati_get_cdb_byte(cdb, 13));
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if(sati_device_state_stopped(sequence, scsi_io))
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{
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return SATI_FAILURE_CHECK_RESPONSE_DATA;
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}
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else
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{
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sequence->type = SATI_SEQUENCE_READ_16;
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// Translate the sector count, write command register, and check various
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// other parts of the CDB.
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status = sati_read_large_translate_command(
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sequence, scsi_io, ata_io, sector_count, &device_head
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);
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// Attempt to translate the 64-bit LBA field from the SCSI request
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// into the 48-bits of LBA in the ATA register FIS.
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if (status == SATI_SUCCESS)
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{
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sati_move_translate_command(sequence, scsi_io, ata_io, device_head);
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status = sati_move_translate_64_bit_lba(sequence, scsi_io, ata_io);
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}
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return status;
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}
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}
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