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freebsd-skq/sys/dev/isci/scil/scif_sas_stp_io_request.c
Jim Harris 3e0a9f1ff2 Fix/add support for SCSI UNMAP to ATA DSM translation. 
This addresses kernel panic observed when sending SCSI UNMAP
commands to SATA disks attached to isci(4).

1) Flesh out callback routines to allocate/free buffers needed for
   translating SCSI UNMAP data to ATA DSM data.
2) Add controller-level pool for storing buffers previously allocated
   for UNMAP translation, to lessen chance of no buffer available
   under memory pressure.
3) Ensure driver properly handles case where buffer pool is empty
   and contigmalloc returns NULL.

Sponsored by: Intel
Reported by: Maksim Yevmenkin <max at netflix dot com>
Discussed with:  scottl
MFC after: 3 days
2012-08-21 22:28:14 +00:00

626 lines
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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 for the
* SCIF_SAS_STP_IO_REQUEST object. The contents will implement
* SATA/STP specific functionality.
*/
#include <dev/isci/scil/scif_sas_stp_io_request.h>
#include <dev/isci/scil/scif_sas_stp_remote_device.h>
#include <dev/isci/scil/scif_sas_logger.h>
#include <dev/isci/scil/scif_sas_controller.h>
#include <dev/isci/scil/sci_status.h>
#include <dev/isci/scil/scic_io_request.h>
#include <dev/isci/scil/sati.h>
#include <dev/isci/scil/sati_atapi.h>
#include <dev/isci/scil/intel_sat.h>
#include <dev/isci/scil/sati_util.h>
#include <dev/isci/scil/sati_callbacks.h>
//******************************************************************************
// P R I V A T E M E T H O D S
//******************************************************************************
/**
* @brief This method provides SATA/STP CONSTRUCTED state specific handling
* for when the user attempts to start the supplied IO request. It
* will allocate NCQ tags if necessary.
*
* @param[in] io_request This parameter specifies the IO request object
* to be started.
*
* @return This method returns a value indicating if the IO request was
* successfully started or not.
* @retval SCI_SUCCESS This return value indicates successful starting
* of the IO request.
*/
static
SCI_STATUS scif_sas_stp_io_request_constructed_start_handler(
SCI_BASE_REQUEST_T * io_request
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T *) io_request;
SCIF_LOG_TRACE((
sci_base_object_get_logger(io_request),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_io_request_constructed_start_handler(0x%x) enter\n",
io_request
));
if (fw_io->parent.stp.sequence.protocol == SAT_PROTOCOL_FPDMA)
{
SATA_FIS_REG_H2D_T * fis;
// For NCQ, we need to attempt to allocate an available tag.
fw_io->parent.stp.ncq_tag = scif_sas_stp_remote_device_allocate_ncq_tag(
fw_io->parent.device
);
if (fw_io->parent.stp.ncq_tag == SCIF_SAS_INVALID_NCQ_TAG)
return SCI_FAILURE_NO_NCQ_TAG_AVAILABLE;
// Set the NCQ tag in the host to device register FIS (upper 5 bits
// of the 8-bit sector count register).
fis = scic_stp_io_request_get_h2d_reg_address(fw_io->parent.core_object);
fis->sector_count = (fw_io->parent.stp.ncq_tag << 3);
// The Core also requires that we inform it separately regarding the
// NCQ tag for this IO.
scic_stp_io_request_set_ncq_tag(
fw_io->parent.core_object, fw_io->parent.stp.ncq_tag
);
}
return SCI_SUCCESS;
}
/**
* @brief This method provides SATA/STP CONSTRUCTED state specific handling
* for when the user attempts to complete the supplied IO request.
* This method will be invoked in the event the call to start the
* core IO request fails for some reason. In this situation, the
* NCQ tag will be freed.
*
* @param[in] io_request This parameter specifies the IO request object
* to be started.
*
* @return This method returns a value indicating if the IO request was
* successfully started or not.
* @retval SCI_SUCCESS This return value indicates successful starting
* of the IO request.
*/
static
SCI_STATUS scif_sas_stp_io_request_constructed_complete_handler(
SCI_BASE_REQUEST_T * io_request
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T *) io_request;
SCIF_LOG_TRACE((
sci_base_object_get_logger(io_request),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_io_request_constructed_complete_handler(0x%x) enter\n",
io_request
));
if (fw_io->parent.stp.sequence.protocol == SAT_PROTOCOL_FPDMA)
{
// For NCQ, we need to return the tag back to the free pool.
if (fw_io->parent.stp.ncq_tag != SCIF_SAS_INVALID_NCQ_TAG)
scif_sas_stp_remote_device_free_ncq_tag(
fw_io->parent.device, fw_io->parent.stp.ncq_tag
);
}
sati_sequence_terminate(&fw_io->parent.stp.sequence, fw_io, fw_io);
return SCI_SUCCESS;
}
/**
* @brief This method provides SATA/STP STARTED state specific handling for
* when the user attempts to complete the supplied IO request.
* It will perform data/response translation and free NCQ tags
* if necessary.
*
* @param[in] io_request This parameter specifies the IO request object
* to be started.
*
* @return This method returns a value indicating if the IO request was
* successfully completed or not.
*/
static
SCI_STATUS scif_sas_stp_core_cb_io_request_complete_handler(
SCIF_SAS_CONTROLLER_T * fw_controller,
SCIF_SAS_REMOTE_DEVICE_T * fw_device,
SCIF_SAS_REQUEST_T * fw_request,
SCI_STATUS * completion_status
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T *) fw_request;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_controller),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_core_cb_io_request_complete_handler(0x%x, 0x%x, 0x%x, 0x%x) enter\n",
fw_controller, fw_device, fw_request, *completion_status
));
if (fw_io->parent.stp.sequence.protocol == SAT_PROTOCOL_FPDMA)
scif_sas_stp_remote_device_free_ncq_tag(
fw_request->device, fw_io->parent.stp.ncq_tag
);
// Translating the response is only necessary if:
// - some sort of error occurred resulting in having the error bit
// set in the ATA status register and values to decode in the
// ATA error register.
// - the command returns information in the register FIS itself,
// which requires translation.
// - the request completed ok but the sequence requires a callback
// to possibly continue the translation
if ((*completion_status == SCI_FAILURE_IO_RESPONSE_VALID) ||
((sati_cb_do_translate_response(fw_request)) &&
(*completion_status != SCI_FAILURE_IO_TERMINATED)))
{
SATI_STATUS sati_status = sati_translate_command_response(
&fw_io->parent.stp.sequence, fw_io, fw_io
);
if (sati_status == SATI_COMPLETE)
*completion_status = SCI_SUCCESS;
else if (sati_status == SATI_FAILURE_CHECK_RESPONSE_DATA)
*completion_status = SCI_FAILURE_IO_RESPONSE_VALID;
else if (sati_status == SATI_SEQUENCE_INCOMPLETE)
{
// The translation indicates that additional SATA requests are
// necessary to finish the original SCSI request. As a result,
// do not complete the IO and begin the next stage of the
// translation.
return SCI_WARNING_SEQUENCE_INCOMPLETE;
}
else if (sati_status == SATI_COMPLETE_IO_DONE_EARLY)
*completion_status = SCI_SUCCESS_IO_DONE_EARLY;
else
{
// Something unexpected occurred during translation. Fail the
// IO request to the user.
*completion_status = SCI_FAILURE;
}
}
else if (*completion_status != SCI_SUCCESS)
{
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_controller),
SCIF_LOG_OBJECT_IO_REQUEST,
"Sequence Terminated(0x%x, 0x%x, 0x%x)\n",
fw_controller, fw_device, fw_request
));
sati_sequence_terminate(&fw_io->parent.stp.sequence, fw_io, fw_io);
}
return SCI_SUCCESS;
}
#if !defined(DISABLE_ATAPI)
/**
* @brief This method provides STP PACKET io request STARTED state specific handling for
* when the user attempts to complete the supplied IO request.
* It will perform data/response translation.
*
* @param[in] io_request This parameter specifies the IO request object
* to be started.
*
* @return This method returns a value indicating if the IO request was
* successfully completed or not.
*/
static
SCI_STATUS scif_sas_stp_core_cb_packet_io_request_complete_handler(
SCIF_SAS_CONTROLLER_T * fw_controller,
SCIF_SAS_REMOTE_DEVICE_T * fw_device,
SCIF_SAS_REQUEST_T * fw_request,
SCI_STATUS * completion_status
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T *) fw_request;
SATI_STATUS sati_status;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_controller),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_packet_core_cb_io_request_complete_handler(0x%x, 0x%x, 0x%x, 0x%x) enter\n",
fw_controller, fw_device, fw_request, *completion_status
));
if (*completion_status == SCI_FAILURE_IO_RESPONSE_VALID)
{
sati_status = sati_atapi_translate_command_response(
&fw_io->parent.stp.sequence, fw_io, fw_io
);
if (sati_status == SATI_COMPLETE)
*completion_status = SCI_SUCCESS;
else if (sati_status == SATI_FAILURE_CHECK_RESPONSE_DATA)
*completion_status = SCI_FAILURE_IO_RESPONSE_VALID;
else if (sati_status == SATI_SEQUENCE_INCOMPLETE)
{
// The translation indicates that additional REQUEST SENSE command is
// necessary to finish the original SCSI request. As a result,
// do not complete the IO and begin the next stage of the IO.
return SCI_WARNING_SEQUENCE_INCOMPLETE;
}
else
{
// Something unexpected occurred during translation. Fail the
// IO request to the user.
*completion_status = SCI_FAILURE;
}
}
else if (*completion_status == SCI_SUCCESS &&
fw_request->stp.sequence.state == SATI_SEQUENCE_STATE_INCOMPLETE)
{
//The internal Request Sense command is completed successfully.
sati_atapi_translate_request_sense_response(
&fw_io->parent.stp.sequence, fw_io, fw_io
);
*completion_status = SCI_FAILURE_IO_RESPONSE_VALID;
}
return SCI_SUCCESS;
}
#endif // !defined(DISABLE_ATAPI)
//******************************************************************************
// P R O T E C T E D M E T H O D S
//******************************************************************************
/**
* @brief This method will construct the SATA/STP specific IO request
* object utilizing the SATI.
*
* @pre The scif_sas_request_construct() method should be invoked before
* calling this method.
*
* @param[in,out] stp_io_request This parameter specifies the stp_io_request
* to be constructed.
*
* @return Indicate if the construction was successful.
* @return SCI_FAILURE_NO_NCQ_TAG_AVAILABLE
* @return SCI_SUCCESS_IO_COMPLETE_BEFORE_START
* @return SCI_FAILURE_IO_RESPONSE_VALID
* @return SCI_FAILURE This return value indicates a change in the translator
* where a new return code has been given, but is not yet understood
* by this routine.
*/
SCI_STATUS scif_sas_stp_io_request_construct(
SCIF_SAS_IO_REQUEST_T * fw_io
)
{
SATI_STATUS sati_status;
SCI_STATUS sci_status = SCI_FAILURE;
SCIF_SAS_REMOTE_DEVICE_T * fw_device = fw_io->parent.device;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_io_request_construct(0x%x) enter\n",
fw_io
));
// The translator will indirectly invoke core methods to set the fields
// of the ATA register FIS inside of this method.
sati_status = sati_translate_command(
&fw_io->parent.stp.sequence,
&fw_device->protocol_device.stp_device.sati_device,
fw_io,
fw_io
);
if (sati_status == SATI_SUCCESS)
{
// Allow the core to finish construction of the IO request.
sci_status = scic_io_request_construct_basic_sata(fw_io->parent.core_object);
fw_io->parent.state_handlers = &stp_io_request_constructed_handlers;
fw_io->parent.protocol_complete_handler
= scif_sas_stp_core_cb_io_request_complete_handler;
}
else if (sati_status == SATI_SUCCESS_SGL_TRANSLATED)
{
SCIC_IO_SATA_PARAMETERS_T parms;
parms.do_translate_sgl = FALSE;
// The translation actually already caused translation of the
// scatter gather list. So, call into the core through an API
// that will not attempt to translate the SGL.
scic_io_request_construct_advanced_sata(
fw_io->parent.core_object, &parms
);
fw_io->parent.state_handlers = &stp_io_request_constructed_handlers;
fw_io->parent.protocol_complete_handler
= scif_sas_stp_core_cb_io_request_complete_handler;
// Done with translation
sci_status = SCI_SUCCESS;
}
else if (sati_status == SATI_COMPLETE)
sci_status = SCI_SUCCESS_IO_COMPLETE_BEFORE_START;
else if (sati_status == SATI_FAILURE_CHECK_RESPONSE_DATA)
sci_status = SCI_FAILURE_IO_RESPONSE_VALID;
else
{
SCIF_LOG_ERROR((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"Unexpected SAT translation failure 0x%x\n",
fw_io
));
}
return sci_status;
}
#if !defined(DISABLE_ATAPI)
/**
* @brief This method will construct the STP PACKET protocol specific IO
* request object.
*
* @pre The scif_sas_request_construct() method should be invoked before
* calling this method.
*
* @param[in,out] fw_io This parameter specifies the stp packet io request
* to be constructed.
*
* @return Indicate if the construction was successful.
* @return SCI_SUCCESS_IO_COMPLETE_BEFORE_START
* @return SCI_FAILURE_IO_RESPONSE_VALID
* @return SCI_FAILURE This return value indicates a change in the translator
* where a new return code has been given, but is not yet understood
* by this routine.
*/
SCI_STATUS scif_sas_stp_packet_io_request_construct(
SCIF_SAS_IO_REQUEST_T * fw_io
)
{
SATI_STATUS sati_status;
SCI_STATUS sci_status = SCI_FAILURE;
SCIF_SAS_REMOTE_DEVICE_T * fw_device = fw_io->parent.device;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_packet_io_request_construct(0x%x) enter\n",
fw_io
));
sati_status = sati_atapi_translate_command(
&fw_io->parent.stp.sequence,
&fw_device->protocol_device.stp_device.sati_device,
fw_io,
fw_io
);
if (sati_status == SATI_SUCCESS)
{
// Allow the core to finish construction of the IO request.
sci_status = scic_io_request_construct_basic_sata(fw_io->parent.core_object);
fw_io->parent.protocol_complete_handler
= scif_sas_stp_core_cb_packet_io_request_complete_handler;
}
else if (sati_status == SATI_COMPLETE)
sci_status = SCI_SUCCESS_IO_COMPLETE_BEFORE_START;
else if (sati_status == SATI_FAILURE_CHECK_RESPONSE_DATA)
sci_status = SCI_FAILURE_IO_RESPONSE_VALID;
else
{
SCIF_LOG_ERROR((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"Unexpected SAT ATAPI translation failure 0x%x\n",
fw_io
));
}
return sci_status;
}
#endif
#if !defined(DISABLE_ATAPI)
/**
* @brief This method will get the number of bytes transferred in an packet IO.
*
* @param[in] fw_io This parameter specifies the stp packet io request whose
* actual transferred length is to be retrieved.
*
* @return Actual length of transferred data.
*/
U32 scif_sas_stp_packet_io_request_get_number_of_bytes_transferred(
SCIF_SAS_IO_REQUEST_T * fw_io
)
{
SCI_IO_REQUEST_HANDLE_T scic_io = scif_io_request_get_scic_handle(fw_io);
SCI_IO_STATUS io_status = scic_request_get_sci_status (scic_io);
U32 actual_data_length;
if (io_status == SCI_IO_FAILURE_RESPONSE_VALID)
actual_data_length = 0;
else if (io_status == SCI_IO_SUCCESS_IO_DONE_EARLY)
{
actual_data_length = sati_atapi_translate_number_of_bytes_transferred(
&fw_io->parent.stp.sequence, fw_io, fw_io);
if (actual_data_length == 0)
actual_data_length =
scic_io_request_get_number_of_bytes_transferred(scic_io);
}
else
actual_data_length =
scic_io_request_get_number_of_bytes_transferred(scic_io);
return actual_data_length;
}
#endif
//******************************************************************************
// P U B L I C M E T H O D S
//******************************************************************************
BOOL scic_cb_io_request_do_copy_rx_frames(
void * scic_user_io_request
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T*) scic_user_io_request;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"scic_cb_io_request_do_copy_rx_frames(0x%x) enter\n",
fw_io
));
// If the translation was a PIO DATA IN (i.e. read) and the request
// was actually a READ payload operation, then copy the data, since
// there will be SGL space allocated for the transfer.
if (fw_io->parent.stp.sequence.protocol == SAT_PROTOCOL_PIO_DATA_IN)
{
if (
(fw_io->parent.stp.sequence.type == SATI_SEQUENCE_ATA_PASSTHROUGH_12)
|| (fw_io->parent.stp.sequence.type == SATI_SEQUENCE_ATA_PASSTHROUGH_16)
|| (
(fw_io->parent.stp.sequence.type >= SATI_SEQUENCE_TYPE_READ_MIN)
&& (fw_io->parent.stp.sequence.type <= SATI_SEQUENCE_TYPE_READ_MAX)
)
)
{
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_io),
SCIF_LOG_OBJECT_IO_REQUEST,
"scic_cb_io_request_do_copy_rx_frames(0x%x) TRUE\n",
fw_io
));
return TRUE;
}
}
// For all other requests we leave the data in the core buffers.
// This allows the translation to translate without having to have
// separate space allocated into which to copy the data.
return FALSE;
}
// ---------------------------------------------------------------------------
U8 scic_cb_request_get_sat_protocol(
void * scic_user_io_request
)
{
SCIF_SAS_IO_REQUEST_T * fw_io = (SCIF_SAS_IO_REQUEST_T*) scic_user_io_request;
return fw_io->parent.stp.sequence.protocol;
}
U8 *scic_cb_io_request_get_virtual_address_from_sgl(
void * scic_user_io_request,
U32 byte_offset
)
{
SCIF_SAS_REQUEST_T *fw_request =
(SCIF_SAS_REQUEST_T *) sci_object_get_association(scic_user_io_request);
return scif_cb_io_request_get_virtual_address_from_sgl(
sci_object_get_association(fw_request),
byte_offset
);
}
#ifdef ENABLE_OSSL_COPY_BUFFER
void scic_cb_io_request_copy_buffer(
void * scic_user_io_request,
U8 *source_addr,
U32 offset,
U32 length
)
{
SCIF_SAS_REQUEST_T *fw_request =
(SCIF_SAS_REQUEST_T *)sci_object_get_association(scic_user_io_request);
return scif_cb_io_request_copy_buffer(
sci_object_get_association(fw_request),
source_addr,
offset,
length
);
}
#endif
// ---------------------------------------------------------------------------
SCI_BASE_REQUEST_STATE_HANDLER_T stp_io_request_constructed_handlers =
{
scif_sas_stp_io_request_constructed_start_handler,
scif_sas_io_request_constructed_abort_handler,
scif_sas_stp_io_request_constructed_complete_handler,
scif_sas_io_request_default_destruct_handler
};
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