3e0a9f1ff2
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
247 lines
11 KiB
C
247 lines
11 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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* $FreeBSD$
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*/
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#ifndef _SCIF_SAS_SATI_BINDING_H_
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#define _SCIF_SAS_SATI_BINDING_H_
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/**
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* @file
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*
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* @brief This file contains the SATI (SCSI to ATA Translation Implementation)
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* callback implementations that can be implemented by the SCI
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* Framework (or core in some cases).
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif // __cplusplus
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#include <dev/isci/scil/scif_user_callback.h>
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#include <dev/isci/scil/scif_io_request.h>
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#include <dev/isci/scil/scif_remote_device.h>
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#include <dev/isci/scil/scic_user_callback.h>
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#include <dev/isci/scil/scic_io_request.h>
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#include <dev/isci/scil/scic_remote_device.h>
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//#include <dev/isci/scil/scic_sds_request.h>
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//#include <dev/isci/scil/scu_task_context.h>
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#include <dev/isci/scil/sci_object.h>
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#include <dev/isci/scil/scif_sas_request.h>
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#include <dev/isci/scil/sci_base_memory_descriptor_list.h>
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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/scic_sds_request.h>
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#include <dev/isci/sci_environment.h>
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// SATI callbacks fulfilled by the framework user.
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#define sati_cb_get_data_byte(scsi_io, byte_offset, value) \
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{ \
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U8 * virtual_address = scif_cb_io_request_get_virtual_address_from_sgl( \
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sci_object_get_association(scsi_io),(byte_offset)\
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); \
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*(value) = *(virtual_address); \
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}
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#define sati_cb_set_data_byte(scsi_io, byte_offset, value) \
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{ \
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U8 * virtual_address = scif_cb_io_request_get_virtual_address_from_sgl( \
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sci_object_get_association(scsi_io),(byte_offset)\
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); \
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*(virtual_address) = value; \
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}
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#define sati_cb_get_cdb_address(scsi_io) \
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scif_cb_io_request_get_cdb_address(sci_object_get_association(scsi_io))
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#define sati_cb_get_cdb_length(scsi_io) \
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scif_cb_io_request_get_cdb_length(sci_object_get_association(scsi_io))
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#define sati_cb_get_data_direction(scsi_io, sati_data_direction) \
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{ \
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SCI_IO_REQUEST_DATA_DIRECTION sci_data_direction = \
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scif_cb_io_request_get_data_direction( \
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sci_object_get_association(scsi_io) \
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); \
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if (sci_data_direction == SCI_IO_REQUEST_DATA_IN) \
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*(sati_data_direction) = SATI_DATA_DIRECTION_IN; \
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else if (sci_data_direction == SCI_IO_REQUEST_DATA_OUT) \
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*(sati_data_direction) = SATI_DATA_DIRECTION_OUT; \
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else if (sci_data_direction == SCI_IO_REQUEST_NO_DATA) \
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*(sati_data_direction) = SATI_DATA_DIRECTION_NONE; \
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}
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#define sati_cb_get_lun(scsi_io) \
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scif_cb_io_request_get_lun(sci_object_get_association(scsi_io))
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// SATI callbacks fulfilled by the framework.
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/**
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* This method implements the functionality necessary to fulfill the
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* SCSI-to-ATA Translation requirements. It ensures that the SAS
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* address for the remote device associated with the supplied IO
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* is written into the sas_address parameter.
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* For more information on the parameters utilized in this method,
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* please refer to sati_cb_device_get_sas_address().
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*/
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#define sati_cb_device_get_sas_address(scsi_io, sas_address) \
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{ \
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SCIF_SAS_REQUEST_T* fw_request = (SCIF_SAS_REQUEST_T*)scsi_io; \
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SCI_REMOTE_DEVICE_HANDLE_T scic_device \
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= scif_remote_device_get_scic_handle(fw_request->device); \
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scic_remote_device_get_sas_address(scic_device, sas_address); \
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}
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#define sati_cb_device_get_request_by_ncq_tag(scsi_io, ncq_tag, matching_req) \
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{ \
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SCIF_SAS_REQUEST_T* fw_request = (SCIF_SAS_REQUEST_T*)scsi_io; \
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SCIF_SAS_REMOTE_DEVICE_T* fw_device = fw_request->device; \
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matching_req = scif_sas_stp_remote_device_get_request_by_ncq_tag(fw_device, ncq_tag); \
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}
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#define sati_cb_io_request_complete(scsi_io, completion_status) \
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{ \
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SCIF_SAS_REQUEST_T* fw_request = (SCIF_SAS_REQUEST_T*)scsi_io; \
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SCIF_SAS_REMOTE_DEVICE_T* fw_device = fw_request->device; \
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SCIF_SAS_DOMAIN_T* fw_domain = fw_device->domain; \
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SCIF_SAS_CONTROLLER_T* fw_controller = fw_domain->controller; \
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scif_cb_io_request_complete( \
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fw_controller, fw_device, fw_request, completion_status \
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); \
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}
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#define sati_cb_get_response_iu_address scif_io_request_get_response_iu_address
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#define sati_cb_get_task_function scic_cb_ssp_task_request_get_function
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#define sati_cb_get_ata_data_address(the_ata_io) \
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scic_io_request_get_rx_frame( \
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scif_io_request_get_scic_handle((the_ata_io)), 0 \
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)
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#define sati_cb_get_h2d_register_fis_address(the_ata_io) \
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(U8*) scic_stp_io_request_get_h2d_reg_address( \
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scif_io_request_get_scic_handle((the_ata_io)) \
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)
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#define sati_cb_get_d2h_register_fis_address(the_ata_io) \
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(U8*) scic_stp_io_request_get_d2h_reg_address( \
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scif_io_request_get_scic_handle((the_ata_io)) \
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)
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#define sati_cb_allocate_dma_buffer(scsi_io, length, virt_address, phys_address_low, phys_address_high) \
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{ \
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SCIF_SAS_REQUEST_T* fw_request = (SCIF_SAS_REQUEST_T*)scsi_io; \
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SCI_PHYSICAL_MEMORY_DESCRIPTOR_T mde; \
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mde.virtual_address = NULL; \
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sci_base_mde_construct( \
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&mde, 4, length, SCI_MDE_ATTRIBUTE_PHYSICALLY_CONTIGUOUS \
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); \
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scif_cb_controller_allocate_memory( \
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fw_request->device->domain->controller, &mde \
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); \
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*(virt_address) = mde.virtual_address; \
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*(phys_address_low) = sci_cb_physical_address_lower(mde.physical_address); \
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*(phys_address_high) = sci_cb_physical_address_upper(mde.physical_address); \
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}
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#define sati_cb_free_dma_buffer(scsi_io, virt_address) \
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{ \
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SCIF_SAS_REQUEST_T* fw_request = (SCIF_SAS_REQUEST_T*)scsi_io; \
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SCI_PHYSICAL_MEMORY_DESCRIPTOR_T mde; \
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mde.virtual_address = virt_address; \
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sci_base_mde_construct( \
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&mde, 4, 0, SCI_MDE_ATTRIBUTE_PHYSICALLY_CONTIGUOUS \
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); \
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scif_cb_controller_free_memory( \
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fw_request->device->domain->controller, &mde \
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); \
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}
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#define sati_cb_sgl_next_sge(scsi_io, ata_io, current_sge, next_sge) \
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{ \
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/* For now just 2 SGEs are supported. */ \
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SCIC_SDS_REQUEST_T *scic_request; \
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SCU_SGL_ELEMENT_PAIR_T *sgl_pair; \
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scic_request = scif_io_request_get_scic_handle((scsi_io)); \
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sgl_pair = scic_sds_request_get_sgl_element_pair(scic_request, 0); \
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\
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if ((current_sge) == NULL) \
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{ \
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*(next_sge) = &(sgl_pair->A); \
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} \
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else \
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{ \
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*(next_sge) = &(sgl_pair->B); \
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} \
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}
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#define sati_cb_sge_write(current_sge, phys_address_low, phys_address_high, byte_length) \
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{ \
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SCU_SGL_ELEMENT_T * scu_sge = (SCU_SGL_ELEMENT_T*) (current_sge); \
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scu_sge->address_upper = (phys_address_high); \
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scu_sge->address_lower = (phys_address_low); \
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scu_sge->length = (byte_length); \
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scu_sge->address_modifier = 0; \
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}
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#define sati_cb_do_translate_response(request) \
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(request)->stp.sequence.is_translate_response_required
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#ifdef __cplusplus
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}
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#endif // __cplusplus
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#endif // _SCIF_SAS_SATI_BINDING_H_
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