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freebsd-dev/sys/dev/isci/scil/sati_move.c
Jim Harris f11c7f6305 Add isci(4) driver for amd64 and i386 targets. 
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
2012-01-31 19:38:18 +00:00

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/*-
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/**
* @file
* @brief This file contains the method implementations common to
* translations that move data (i.e. read, write). It has code for
* the various different size CDBs (6, 10, 12, 16).
*/
#include <dev/isci/scil/sati_move.h>
#include <dev/isci/scil/sati_callbacks.h>
#include <dev/isci/scil/sati_translator_sequence.h>
#include <dev/isci/scil/sati_util.h>
#include <dev/isci/scil/intel_ata.h>
#include <dev/isci/scil/intel_scsi.h>
#include <dev/isci/scil/intel_sat.h>
//******************************************************************************
//* P R I V A T E M E T H O D S
//******************************************************************************
/**
* @brief This method simply sets the command register based upon the
* supplied opcodes and the data direction.
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @param[in] write_opcode This parameter specifies the value to be written
* to the ATA command register for a write (data out) operation.
* @param[in] read_opcode This parameter specifies the value to be written
* to the ATA command register for a read (data in) operation.
*
* @return none.
*/
static
void sati_move_set_ata_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * ata_io,
U8 write_opcode,
U8 read_opcode
)
{
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
if (sequence->data_direction == SATI_DATA_DIRECTION_OUT)
sati_set_ata_command(register_fis, write_opcode);
else
sati_set_ata_command(register_fis, read_opcode);
}
/**
* @brief This method will translate the SCSI transfer count from the 6-byte
* CDB into the appropriate amount in the ATA register FIS. Please
* note for 48-bit UDMA requests, the caller must set the sector
* count extended field. This method also sets protocol and
* command fields.
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @param[in] write_opcode This parameter specifies the value to be written
* to the ATA command register for a write (data out) operation.
* @param[in] read_opcode This parameter specifies the value to be written
* to the ATA command register for a read (data in) operation.
*
* @return none
*/
static
void sati_move_small_udma_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U8 write_opcode,
U8 read_opcode
)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
sati_move_set_ata_command(sequence, ata_io, write_opcode, read_opcode);
sati_set_ata_sector_count(register_fis, sati_get_cdb_byte(cdb, 4));
if (sequence->data_direction == SATI_DATA_DIRECTION_IN)
sequence->protocol = SAT_PROTOCOL_UDMA_DATA_IN;
else
sequence->protocol = SAT_PROTOCOL_UDMA_DATA_OUT;
}
/**
* @brief This method will translate the SCSI transfer count from the
* supplied sector_count parameter into the ATA register FIS.
* The translation is specific to 10,12, 16 byte CDBs.
* This method also sets protocol and command fields.
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @param[in] sector_count This parameter specifies the number of sectors
* to be transfered.
* @param[in] write_opcode This parameter specifies the value to be written
* to the ATA command register for a write (data out) operation.
* @param[in] read_opcode This parameter specifies the value to be written
* to the ATA command register for a read (data in) operation.
*
* @return Please reference sati_move_set_sector_count() for information
* on return codes from this method.
*/
static
SATI_STATUS sati_move_large_udma_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U32 sector_count,
U8 write_opcode,
U8 read_opcode
)
{
sati_move_set_ata_command(sequence, ata_io, write_opcode, read_opcode);
if (sequence->data_direction == SATI_DATA_DIRECTION_IN)
sequence->protocol = SAT_PROTOCOL_UDMA_DATA_IN;
else
sequence->protocol = SAT_PROTOCOL_UDMA_DATA_OUT;
return sati_move_set_sector_count(
sequence, scsi_io, ata_io, sector_count, FALSE
);
}
/**
* @brief This method will translate the SCSI transfer count from the 6-byte
* CDB into the appropriate amount in the ATA register FIS.
* This is only used for translation of 6-byte SCSI CDBs.
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @return none
*/
static
void sati_move_ncq_translate_8_bit_sector_count(
void * scsi_io,
void * ata_io
)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
sati_set_ata_features(register_fis, sati_get_cdb_byte(cdb, 4));
// A read 6 with a 0 sector count indicates a transfer of 256 sectors.
// As a result update the MSB (features expanded register) to indicate
// 256 sectors (0x100).
if (sati_get_cdb_byte(cdb, 4) == 0)
sati_set_ata_features_exp(register_fis, 1);
}
//******************************************************************************
//* P U B L I C M E T H O D S
//******************************************************************************
/**
* @brief This method will process a 32-bit sector into the appropriate fields
* in a register FIS. This method works for both 8-bit and 16-bit sector
* counts.
* This is used for translation of 10, 12, and 16-byte SCSI CDBs.
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @note This method should only be called for CDB sizes of 10-bytes or larger.
*
* @param[in] sector_count This parameter specifies the number of sectors
* to be transfered.
* @param[in] is_fpdma_command This parameter indicates if the supplied
* ata_io is a first party DMA request (NCQ).
*
* @return none
*/
SATI_STATUS sati_move_set_sector_count(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U32 sector_count,
U8 is_fpdma_command
)
{
U32 max_sector_count;
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
if (sequence->device->capabilities & SATI_DEVICE_CAP_48BIT_ENABLE)
max_sector_count = 65536;
else
max_sector_count = 256;
// Check the CDB transfer length count and set the register FIS sector
// count fields
if (0 == sector_count)
{
// A SCSI sector count of 0 for 10-byte CDBs and larger indicate no data
// transfer, so simply complete the command immediately.
return SATI_COMPLETE;
}
else if (sector_count >= max_sector_count)
{
// We have to perform multiple SATA commands to satisfy the sector
// count specified in the SCSI command.
sequence->command_specific_data.move_sector_count =
sector_count - max_sector_count;
// In ATA a sector count of 0 indicates use the maximum allowed for
// the command (i.e. 0 == 2^16 or 2^8).
sector_count = 0;
}
if (is_fpdma_command)
{
sati_set_ata_features(register_fis, sector_count & 0xFF);
sati_set_ata_features_exp(register_fis, (sector_count >> 8) & 0xFF);
}
else
{
sati_set_ata_sector_count(register_fis, sector_count & 0xFF);
sati_set_ata_sector_count_exp(register_fis, (sector_count >> 8) & 0xFF);
}
return SATI_SUCCESS;
}
/**
* @brief This method simply translates the 32-bit logical block address
* field from the SCSI CDB (10 or 12-byte) into the ATA task
* file (register FIS).
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @return none
*/
void sati_move_translate_32_bit_lba(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io
)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
sati_set_ata_lba_low(register_fis, sati_get_cdb_byte(cdb, 5));
sati_set_ata_lba_mid(register_fis, sati_get_cdb_byte(cdb, 4));
sati_set_ata_lba_high(register_fis, sati_get_cdb_byte(cdb, 3));
sati_set_ata_lba_low_exp(register_fis, sati_get_cdb_byte(cdb, 2));
sati_set_ata_lba_mid_exp(register_fis, 0);
sati_set_ata_lba_high_exp(register_fis, 0);
}
/**
* @brief This method simply translates the 64-bit logical block address
* field from the SCSI CDB (16 byte) into the ATA task
* file (register FIS). The 2 most significant bytes must be 0,
* since ATA devices can, at most, support 48-bits of LBA.
* For more information on the parameters passed to this method,
* please reference sati_translate_command()
*
* @return Indicate if the LBA translation succeeded.
* @return SATI_SUCCESS This is returned if translation was successful.
* @return SATI_FAILURE_CHECK_RESPONSE_DATA This is returned if either
* of the 2 most significant bytes contain a non-zero value.
*/
SATI_STATUS sati_move_translate_64_bit_lba(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io
)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
// Ensure we receive a logical block address that is within range of
// addressibility per the ATA specification (i.e. 48-bit or 28-bit).
if ( (sati_get_cdb_byte(cdb, 2) == 0) && (sati_get_cdb_byte(cdb, 3) == 0) )
{
sati_set_ata_lba_low(register_fis, sati_get_cdb_byte(cdb, 9));
sati_set_ata_lba_mid(register_fis, sati_get_cdb_byte(cdb, 8));
sati_set_ata_lba_high(register_fis, sati_get_cdb_byte(cdb, 7));
sati_set_ata_lba_low_exp(register_fis, sati_get_cdb_byte(cdb, 6));
sati_set_ata_lba_mid_exp(register_fis, sati_get_cdb_byte(cdb, 5));
sati_set_ata_lba_high_exp(register_fis, sati_get_cdb_byte(cdb, 4));
return SATI_SUCCESS;
}
else
{
sati_scsi_sense_data_construct(
sequence,
scsi_io,
SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_ASC_LBA_OUT_OF_RANGE,
SCSI_ASCQ_LBA_OUT_OF_RANGE
);
return SATI_FAILURE_CHECK_RESPONSE_DATA;
}
}
/**
* @brief This method will translate the pieces common to SCSI read and
* write 6 byte commands. Depending upon the capabilities
* supported by the target different ATA commands can be selected.
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @return Indicate if the command translation succeeded.
* @retval SCI_SUCCESS This is returned if the command translation was
* successful.
*/
SATI_STATUS sati_move_6_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io
)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
// Translate the logical block address information from the SCSI CDB.
// There is only 5 bits of MSB located in byte 1 of the CDB.
sati_set_ata_lba_low(register_fis, sati_get_cdb_byte(cdb, 3));
sati_set_ata_lba_mid(register_fis, sati_get_cdb_byte(cdb, 2));
sati_set_ata_lba_high(register_fis, sati_get_cdb_byte(cdb, 1) & 0x1F);
sati_move_translate_command(sequence, scsi_io, ata_io, 0);
return SATI_SUCCESS;
}
/**
* @brief This method will translate the pieces common to SCSI read and
* write 10/12 byte commands. Depending upon the capabilities
* supported by the target different ATA commands can be selected.
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @param[in] device_head This parameter specifies the contents to be
* written to the device head register.
*
* @return Indicate if the command translation succeeded.
* @retval SCI_SUCCESS This is returned if the command translation was
* successful.
*/
SATI_STATUS sati_move_32_bit_lba_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U8 device_head
)
{
sati_move_translate_32_bit_lba(sequence, scsi_io, ata_io);
sati_move_translate_command(sequence, scsi_io, ata_io, device_head);
return SATI_SUCCESS;
}
/**
* @brief This method provides the common translation functionality for
* the 6-byte move command descriptor blocks (CDBs).
* This method will ensure that the following is performed:
* - command register is set
* - the SATI_TRANSLATOR_SEQUENCE::protocol field is set
* - the sector count field(s) are set
* - sati_move_6_translate_command() is invoked.
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @pre The caller must ensure that the
* SATI_TRANSLATOR_SEQUENCE::data_direction field has already been set.
*
* @return Indicate if the command translation succeeded.
* @see sati_move_6_translate_command() for additional return codes.
*/
SATI_STATUS sati_move_small_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io
)
{
// Translation of the sector count is performed differently for NCQ vs.
// other protocols.
if (sequence->device->capabilities & SATI_DEVICE_CAP_NCQ_SUPPORTED_ENABLE)
{
sati_move_set_ata_command(
sequence, ata_io, ATA_WRITE_FPDMA, ATA_READ_FPDMA
);
sati_move_ncq_translate_8_bit_sector_count(scsi_io, ata_io);
sequence->protocol = SAT_PROTOCOL_FPDMA;
}
else if (sequence->device->capabilities & SATI_DEVICE_CAP_48BIT_ENABLE)
{
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
sati_move_small_udma_translate_command(
sequence, scsi_io, ata_io, ATA_WRITE_DMA_EXT, ATA_READ_DMA_EXT
);
// A read/write 6 with a 0 sector count indicates a transfer of 256
// sectors. As a result update the MSB (features expanded register)
// to indicate 256 sectors (0x100).
if (sati_get_cdb_byte(cdb, 4) == 0)
{
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
sati_set_ata_sector_count_exp(register_fis, 1);
}
}
else if (sequence->device->capabilities & SATI_DEVICE_CAP_UDMA_ENABLE)
{
sati_move_small_udma_translate_command(
sequence, scsi_io, ata_io, ATA_WRITE_DMA, ATA_READ_DMA
);
}
else
{
/**
* Currently the translation does not support devices incapable of
* handling the 48-bit feature set (i.e. 16 bits of sector count).
*/
sati_scsi_sense_data_construct(
sequence,
scsi_io,
SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_ASC_INVALID_FIELD_IN_CDB,
SCSI_ASCQ_INVALID_FIELD_IN_CDB
);
return SATI_FAILURE_CHECK_RESPONSE_DATA;
}
return sati_move_6_translate_command(sequence, scsi_io, ata_io);
}
/**
* @brief This method provides the common translation functionality for
* the larger command descriptor blocks (10, 12, 16-byte CDBs).
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @param[in] sector_count This parameter specifies the number of sectors
* to be transfered.
* @param[in] device_head This parameter specifies the contents to be
* written to the device head register.
*
* @return Indicate if the command translation succeeded.
* @retval SATI_FAILURE This value is returned if neither NCQ or DMA is
* supported by the target device.
* @see sati_move_set_sector_count() for additional return codes.
*/
SATI_STATUS sati_move_large_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U32 sector_count,
U8 * ata_device_head
)
{
SATI_STATUS status = SATI_SUCCESS;
U8 * cdb = sati_cb_get_cdb_address(scsi_io);
// Parts of translation (e.g. sector count) is performed differently
// for NCQ vs. other protocols.
if (sequence->device->capabilities & SATI_DEVICE_CAP_NCQ_SUPPORTED_ENABLE)
{
// if the user did not request to ignore FUA
if((sequence->device->capabilities & SATI_DEVICE_CAP_IGNORE_FUA)==0)
{
// Is the Force Unit Access bit set?
if (sati_get_cdb_byte(cdb, 1) & SCSI_MOVE_FUA_BIT_ENABLE)
*ata_device_head = ATA_DEV_HEAD_REG_FUA_ENABLE;
}
sati_move_set_ata_command(
sequence, ata_io, ATA_WRITE_FPDMA, ATA_READ_FPDMA
);
status = sati_move_set_sector_count(
sequence, scsi_io, ata_io, sector_count, TRUE
);
sequence->protocol = SAT_PROTOCOL_FPDMA;
}
else if (sequence->device->capabilities & SATI_DEVICE_CAP_48BIT_ENABLE)
{
// Is the Force Unit Access bit set? If it is, then error. We
// aren't supporting this yet for normal DMA.
if (sati_get_cdb_byte(cdb, 1) & SCSI_MOVE_FUA_BIT_ENABLE)
{
sati_scsi_sense_data_construct(
sequence,
scsi_io,
SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_ASC_INVALID_FIELD_IN_CDB,
SCSI_ASCQ_INVALID_FIELD_IN_CDB
);
return SATI_FAILURE_CHECK_RESPONSE_DATA;
}
status = sati_move_large_udma_translate_command(
sequence,
scsi_io,
ata_io,
sector_count,
ATA_WRITE_DMA_EXT,
ATA_READ_DMA_EXT
);
}
else if (sequence->device->capabilities & SATI_DEVICE_CAP_UDMA_ENABLE)
{
status = sati_move_large_udma_translate_command(
sequence,
scsi_io,
ata_io,
sector_count,
ATA_WRITE_DMA,
ATA_READ_DMA
);
}
else
{
/**
* Currently the translation does not support devices incapable of
* handling the 48-bit feature set (i.e. 16 bits of sector count).
*/
sati_scsi_sense_data_construct(
sequence,
scsi_io,
SCSI_STATUS_CHECK_CONDITION,
SCSI_SENSE_ILLEGAL_REQUEST,
SCSI_ASC_INVALID_FIELD_IN_CDB,
SCSI_ASCQ_INVALID_FIELD_IN_CDB
);
return SATI_FAILURE_CHECK_RESPONSE_DATA;
}
return status;
}
/**
* @brief This method simply performs the functionality common to all
* payload data movement translations (i.e. READ/WRITE).
* For more information on the parameters passed to this method,
* please reference sati_translate_command().
*
* @param[in] device_head This parameter specifies the current contents
* to be written to the ATA task file (register FIS) device
* head register.
*
* @return none
*/
void sati_move_translate_command(
SATI_TRANSLATOR_SEQUENCE_T * sequence,
void * scsi_io,
void * ata_io,
U8 device_head
)
{
U8 * register_fis = sati_cb_get_h2d_register_fis_address(ata_io);
sati_set_ata_device_head(
register_fis, device_head | ATA_DEV_HEAD_REG_LBA_MODE_ENABLE
);
}
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