forked from Minki/linux
f4636a7b2a
Unify the implementation in scic_sds_request_start and kill the state handler. Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Piotr Sawicki <piotr.sawicki@intel.com> [remove scic_sds_request_constructed_state_start_handler] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
848 lines
24 KiB
C
848 lines
24 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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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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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#ifndef _ISCI_REQUEST_H_
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#define _ISCI_REQUEST_H_
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#include "isci.h"
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#include "host.h"
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#include "scu_task_context.h"
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/**
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* struct isci_request_status - This enum defines the possible states of an I/O
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* request.
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*
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*
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*/
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enum isci_request_status {
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unallocated = 0x00,
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allocated = 0x01,
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started = 0x02,
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completed = 0x03,
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aborting = 0x04,
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aborted = 0x05,
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terminating = 0x06,
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dead = 0x07
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};
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enum task_type {
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io_task = 0,
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tmf_task = 1
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};
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enum sci_request_protocol {
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SCIC_NO_PROTOCOL,
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SCIC_SMP_PROTOCOL,
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SCIC_SSP_PROTOCOL,
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SCIC_STP_PROTOCOL
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}; /* XXX remove me, use sas_task.{dev|task_proto} instead */;
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struct scic_sds_stp_request {
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union {
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u32 ncq;
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u32 udma;
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struct scic_sds_stp_pio_request {
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/**
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* Total transfer for the entire PIO request recorded at request constuction
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* time.
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*
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* @todo Should we just decrement this value for each byte of data transitted
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* or received to elemenate the current_transfer_bytes field?
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*/
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u32 total_transfer_bytes;
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/**
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* Total number of bytes received/transmitted in data frames since the start
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* of the IO request. At the end of the IO request this should equal the
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* total_transfer_bytes.
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*/
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u32 current_transfer_bytes;
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/**
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* The number of bytes requested in the in the PIO setup.
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*/
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u32 pio_transfer_bytes;
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/**
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* PIO Setup ending status value to tell us if we need to wait for another FIS
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* or if the transfer is complete. On the receipt of a D2H FIS this will be
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* the status field of that FIS.
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*/
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u8 ending_status;
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/**
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* On receipt of a D2H FIS this will be the ending error field if the
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* ending_status has the SATA_STATUS_ERR bit set.
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*/
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u8 ending_error;
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struct scic_sds_request_pio_sgl {
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struct scu_sgl_element_pair *sgl_pair;
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u8 sgl_set;
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u32 sgl_offset;
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} request_current;
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} pio;
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struct {
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/**
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* The number of bytes requested in the PIO setup before CDB data frame.
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*/
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u32 device_preferred_cdb_length;
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} packet;
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} type;
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};
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struct scic_sds_request {
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/**
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* This field contains the information for the base request state machine.
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*/
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struct sci_base_state_machine state_machine;
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/**
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* This field simply points to the controller to which this IO request
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* is associated.
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*/
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struct scic_sds_controller *owning_controller;
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/**
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* This field simply points to the remote device to which this IO request
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* is associated.
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*/
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struct scic_sds_remote_device *target_device;
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/**
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* This field is utilized to determine if the SCI user is managing
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* the IO tag for this request or if the core is managing it.
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*/
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bool was_tag_assigned_by_user;
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/**
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* This field indicates the IO tag for this request. The IO tag is
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* comprised of the task_index and a sequence count. The sequence count
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* is utilized to help identify tasks from one life to another.
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*/
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u16 io_tag;
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/**
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* This field specifies the protocol being utilized for this
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* IO request.
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*/
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enum sci_request_protocol protocol;
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/**
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* This field indicates the completion status taken from the SCUs
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* completion code. It indicates the completion result for the SCU hardware.
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*/
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u32 scu_status;
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/**
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* This field indicates the completion status returned to the SCI user. It
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* indicates the users view of the io request completion.
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*/
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u32 sci_status;
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/**
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* This field contains the value to be utilized when posting (e.g. Post_TC,
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* Post_TC_Abort) this request to the silicon.
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*/
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u32 post_context;
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struct scu_task_context *task_context_buffer;
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struct scu_task_context tc ____cacheline_aligned;
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/* could be larger with sg chaining */
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#define SCU_SGL_SIZE ((SCU_IO_REQUEST_SGE_COUNT + 1) / 2)
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struct scu_sgl_element_pair sg_table[SCU_SGL_SIZE] __attribute__ ((aligned(32)));
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/**
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* This field indicates if this request is a task management request or
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* normal IO request.
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*/
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bool is_task_management_request;
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/**
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* This field is a pointer to the stored rx frame data. It is used in STP
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* internal requests and SMP response frames. If this field is non-NULL the
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* saved frame must be released on IO request completion.
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*
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* @todo In the future do we want to keep a list of RX frame buffers?
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*/
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u32 saved_rx_frame_index;
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/**
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* This field specifies the current state handlers in place for this
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* IO Request object. This field is updated each time the request
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* changes state.
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*/
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const struct scic_sds_io_request_state_handler *state_handlers;
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/**
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* This field in the recorded device sequence for the io request. This is
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* recorded during the build operation and is compared in the start
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* operation. If the sequence is different then there was a change of
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* devices from the build to start operations.
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*/
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u8 device_sequence;
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union {
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struct {
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union {
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struct ssp_cmd_iu cmd;
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struct ssp_task_iu tmf;
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};
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union {
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struct ssp_response_iu rsp;
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u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
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};
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} ssp;
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struct {
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struct smp_req cmd;
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struct smp_resp rsp;
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} smp;
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struct {
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struct scic_sds_stp_request req;
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struct host_to_dev_fis cmd;
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struct dev_to_host_fis rsp;
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} stp;
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};
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};
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static inline struct scic_sds_request *to_sci_req(struct scic_sds_stp_request *stp_req)
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{
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struct scic_sds_request *sci_req;
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sci_req = container_of(stp_req, typeof(*sci_req), stp.req);
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return sci_req;
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}
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struct isci_request {
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enum isci_request_status status;
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enum task_type ttype;
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unsigned short io_tag;
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bool complete_in_target;
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bool terminated;
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union ttype_ptr_union {
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struct sas_task *io_task_ptr; /* When ttype==io_task */
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struct isci_tmf *tmf_task_ptr; /* When ttype==tmf_task */
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} ttype_ptr;
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struct isci_host *isci_host;
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struct isci_remote_device *isci_device;
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/* For use in the requests_to_{complete|abort} lists: */
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struct list_head completed_node;
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/* For use in the reqs_in_process list: */
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struct list_head dev_node;
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spinlock_t state_lock;
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dma_addr_t request_daddr;
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dma_addr_t zero_scatter_daddr;
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unsigned int num_sg_entries; /* returned by pci_alloc_sg */
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/** Note: "io_request_completion" is completed in two different ways
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* depending on whether this is a TMF or regular request.
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* - TMF requests are completed in the thread that started them;
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* - regular requests are completed in the request completion callback
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* function.
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* This difference in operation allows the aborter of a TMF request
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* to be sure that once the TMF request completes, the I/O that the
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* TMF was aborting is guaranteed to have completed.
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*/
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struct completion *io_request_completion;
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struct scic_sds_request sci;
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};
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static inline struct isci_request *sci_req_to_ireq(struct scic_sds_request *sci_req)
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{
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struct isci_request *ireq = container_of(sci_req, typeof(*ireq), sci);
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return ireq;
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}
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/**
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* enum sci_base_request_states - This enumeration depicts all the states for
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* the common request state machine.
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*
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*
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*/
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enum sci_base_request_states {
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/**
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* Simply the initial state for the base request state machine.
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*/
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SCI_BASE_REQUEST_STATE_INITIAL,
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/**
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* This state indicates that the request has been constructed. This state
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* is entered from the INITIAL state.
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*/
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SCI_BASE_REQUEST_STATE_CONSTRUCTED,
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/**
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* This state indicates that the request has been started. This state is
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* entered from the CONSTRUCTED state.
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*/
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SCI_BASE_REQUEST_STATE_STARTED,
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SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_TC_COMPLETION_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_UDMA_AWAIT_D2H_REG_FIS_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_H2D_COMPLETION_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_NON_DATA_AWAIT_D2H_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_ASSERTED_COMPLETION_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_H2D_DIAGNOSTIC_COMPLETION_SUBSTATE,
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SCIC_SDS_STP_REQUEST_STARTED_SOFT_RESET_AWAIT_D2H_RESPONSE_FRAME_SUBSTATE,
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/**
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* While in this state the IO request object is waiting for the TC completion
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* notification for the H2D Register FIS
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*/
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SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_H2D_COMPLETION_SUBSTATE,
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/**
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* While in this state the IO request object is waiting for either a PIO Setup
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* FIS or a D2H register FIS. The type of frame received is based on the
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* result of the prior frame and line conditions.
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*/
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SCIC_SDS_STP_REQUEST_STARTED_PIO_AWAIT_FRAME_SUBSTATE,
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/**
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* While in this state the IO request object is waiting for a DATA frame from
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* the device.
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*/
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SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_IN_AWAIT_DATA_SUBSTATE,
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/**
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* While in this state the IO request object is waiting to transmit the next data
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* frame to the device.
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*/
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SCIC_SDS_STP_REQUEST_STARTED_PIO_DATA_OUT_TRANSMIT_DATA_SUBSTATE,
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/**
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* The AWAIT_TC_COMPLETION sub-state indicates that the started raw
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* task management request is waiting for the transmission of the
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* initial frame (i.e. command, task, etc.).
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*/
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_COMPLETION,
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/**
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* This sub-state indicates that the started task management request
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* is waiting for the reception of an unsolicited frame
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* (i.e. response IU).
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*/
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SCIC_SDS_IO_REQUEST_STARTED_TASK_MGMT_SUBSTATE_AWAIT_TC_RESPONSE,
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/**
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* This sub-state indicates that the started task management request
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* is waiting for the reception of an unsolicited frame
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* (i.e. response IU).
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*/
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SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_RESPONSE,
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/**
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* The AWAIT_TC_COMPLETION sub-state indicates that the started SMP request is
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* waiting for the transmission of the initial frame (i.e. command, task, etc.).
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*/
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SCIC_SDS_SMP_REQUEST_STARTED_SUBSTATE_AWAIT_TC_COMPLETION,
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/**
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* This state indicates that the request has completed.
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* This state is entered from the STARTED state. This state is entered from
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* the ABORTING state.
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*/
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SCI_BASE_REQUEST_STATE_COMPLETED,
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/**
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* This state indicates that the request is in the process of being
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* terminated/aborted.
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* This state is entered from the CONSTRUCTED state.
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* This state is entered from the STARTED state.
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*/
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SCI_BASE_REQUEST_STATE_ABORTING,
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/**
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* Simply the final state for the base request state machine.
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*/
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SCI_BASE_REQUEST_STATE_FINAL,
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};
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typedef enum sci_status (*scic_sds_io_request_handler_t)
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(struct scic_sds_request *request);
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typedef enum sci_status (*scic_sds_io_request_frame_handler_t)
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(struct scic_sds_request *req, u32 frame);
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typedef enum sci_status (*scic_sds_io_request_event_handler_t)
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(struct scic_sds_request *req, u32 event);
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typedef enum sci_status (*scic_sds_io_request_task_completion_handler_t)
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(struct scic_sds_request *req, u32 completion_code);
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/**
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* struct scic_sds_io_request_state_handler - This is the SDS core definition
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* of the state handlers.
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*
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*
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*/
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struct scic_sds_io_request_state_handler {
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/**
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* The complete_handler specifies the method invoked when a user attempts to
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* complete a request.
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*/
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scic_sds_io_request_handler_t complete_handler;
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scic_sds_io_request_task_completion_handler_t tc_completion_handler;
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scic_sds_io_request_event_handler_t event_handler;
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scic_sds_io_request_frame_handler_t frame_handler;
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};
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/**
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* scic_sds_request_get_controller() -
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*
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* This macro will return the controller for this io request object
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*/
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#define scic_sds_request_get_controller(sci_req) \
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((sci_req)->owning_controller)
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/**
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* scic_sds_request_get_device() -
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*
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* This macro will return the device for this io request object
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*/
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#define scic_sds_request_get_device(sci_req) \
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((sci_req)->target_device)
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/**
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* scic_sds_request_get_port() -
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*
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* This macro will return the port for this io request object
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*/
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#define scic_sds_request_get_port(sci_req) \
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scic_sds_remote_device_get_port(scic_sds_request_get_device(sci_req))
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/**
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* scic_sds_request_get_post_context() -
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*
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* This macro returns the constructed post context result for the io request.
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*/
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#define scic_sds_request_get_post_context(sci_req) \
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((sci_req)->post_context)
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/**
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* scic_sds_request_get_task_context() -
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*
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* This is a helper macro to return the os handle for this request object.
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*/
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#define scic_sds_request_get_task_context(request) \
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((request)->task_context_buffer)
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/**
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* scic_sds_request_set_status() -
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*
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* This macro will set the scu hardware status and sci request completion
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* status for an io request.
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*/
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#define scic_sds_request_set_status(request, scu_status_code, sci_status_code) \
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{ \
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(request)->scu_status = (scu_status_code); \
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(request)->sci_status = (sci_status_code); \
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}
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#define scic_sds_request_complete(a_request) \
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((a_request)->state_handlers->complete_handler(a_request))
|
|
|
|
|
|
extern enum sci_status
|
|
scic_sds_io_request_tc_completion(struct scic_sds_request *request, u32 completion_code);
|
|
|
|
/**
|
|
* SCU_SGL_ZERO() -
|
|
*
|
|
* This macro zeros the hardware SGL element data
|
|
*/
|
|
#define SCU_SGL_ZERO(scu_sge) \
|
|
{ \
|
|
(scu_sge).length = 0; \
|
|
(scu_sge).address_lower = 0; \
|
|
(scu_sge).address_upper = 0; \
|
|
(scu_sge).address_modifier = 0; \
|
|
}
|
|
|
|
/**
|
|
* SCU_SGL_COPY() -
|
|
*
|
|
* This macro copys the SGL Element data from the host os to the hardware SGL
|
|
* elment data
|
|
*/
|
|
#define SCU_SGL_COPY(scu_sge, os_sge) \
|
|
{ \
|
|
(scu_sge).length = sg_dma_len(sg); \
|
|
(scu_sge).address_upper = \
|
|
upper_32_bits(sg_dma_address(sg)); \
|
|
(scu_sge).address_lower = \
|
|
lower_32_bits(sg_dma_address(sg)); \
|
|
(scu_sge).address_modifier = 0; \
|
|
}
|
|
|
|
enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req);
|
|
enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req);
|
|
enum sci_status scic_sds_io_request_event_handler(struct scic_sds_request *sci_req,
|
|
u32 event_code);
|
|
enum sci_status scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
|
|
u32 frame_index);
|
|
enum sci_status scic_sds_task_request_terminate(struct scic_sds_request *sci_req);
|
|
|
|
/* XXX open code in caller */
|
|
static inline void *scic_request_get_virt_addr(struct scic_sds_request *sci_req,
|
|
dma_addr_t phys_addr)
|
|
{
|
|
struct isci_request *ireq = sci_req_to_ireq(sci_req);
|
|
dma_addr_t offset;
|
|
|
|
BUG_ON(phys_addr < ireq->request_daddr);
|
|
|
|
offset = phys_addr - ireq->request_daddr;
|
|
|
|
BUG_ON(offset >= sizeof(*ireq));
|
|
|
|
return (char *)ireq + offset;
|
|
}
|
|
|
|
/* XXX open code in caller */
|
|
static inline dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sci_req,
|
|
void *virt_addr)
|
|
{
|
|
struct isci_request *ireq = sci_req_to_ireq(sci_req);
|
|
|
|
char *requested_addr = (char *)virt_addr;
|
|
char *base_addr = (char *)ireq;
|
|
|
|
BUG_ON(requested_addr < base_addr);
|
|
BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
|
|
|
|
return ireq->request_daddr + (requested_addr - base_addr);
|
|
}
|
|
|
|
/**
|
|
* This function gets the status of the request object.
|
|
* @request: This parameter points to the isci_request object
|
|
*
|
|
* status of the object as a isci_request_status enum.
|
|
*/
|
|
static inline
|
|
enum isci_request_status isci_request_get_state(
|
|
struct isci_request *isci_request)
|
|
{
|
|
BUG_ON(isci_request == NULL);
|
|
|
|
/*probably a bad sign... */
|
|
if (isci_request->status == unallocated)
|
|
dev_warn(&isci_request->isci_host->pdev->dev,
|
|
"%s: isci_request->status == unallocated\n",
|
|
__func__);
|
|
|
|
return isci_request->status;
|
|
}
|
|
|
|
|
|
/**
|
|
* isci_request_change_state() - This function sets the status of the request
|
|
* object.
|
|
* @request: This parameter points to the isci_request object
|
|
* @status: This Parameter is the new status of the object
|
|
*
|
|
*/
|
|
static inline enum isci_request_status isci_request_change_state(
|
|
struct isci_request *isci_request,
|
|
enum isci_request_status status)
|
|
{
|
|
enum isci_request_status old_state;
|
|
unsigned long flags;
|
|
|
|
dev_dbg(&isci_request->isci_host->pdev->dev,
|
|
"%s: isci_request = %p, state = 0x%x\n",
|
|
__func__,
|
|
isci_request,
|
|
status);
|
|
|
|
BUG_ON(isci_request == NULL);
|
|
|
|
spin_lock_irqsave(&isci_request->state_lock, flags);
|
|
old_state = isci_request->status;
|
|
isci_request->status = status;
|
|
spin_unlock_irqrestore(&isci_request->state_lock, flags);
|
|
|
|
return old_state;
|
|
}
|
|
|
|
/**
|
|
* isci_request_change_started_to_newstate() - This function sets the status of
|
|
* the request object.
|
|
* @request: This parameter points to the isci_request object
|
|
* @status: This Parameter is the new status of the object
|
|
*
|
|
* state previous to any change.
|
|
*/
|
|
static inline enum isci_request_status isci_request_change_started_to_newstate(
|
|
struct isci_request *isci_request,
|
|
struct completion *completion_ptr,
|
|
enum isci_request_status newstate)
|
|
{
|
|
enum isci_request_status old_state;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&isci_request->state_lock, flags);
|
|
|
|
old_state = isci_request->status;
|
|
|
|
if (old_state == started || old_state == aborting) {
|
|
BUG_ON(isci_request->io_request_completion != NULL);
|
|
|
|
isci_request->io_request_completion = completion_ptr;
|
|
isci_request->status = newstate;
|
|
}
|
|
spin_unlock_irqrestore(&isci_request->state_lock, flags);
|
|
|
|
dev_dbg(&isci_request->isci_host->pdev->dev,
|
|
"%s: isci_request = %p, old_state = 0x%x\n",
|
|
__func__,
|
|
isci_request,
|
|
old_state);
|
|
|
|
return old_state;
|
|
}
|
|
|
|
/**
|
|
* isci_request_change_started_to_aborted() - This function sets the status of
|
|
* the request object.
|
|
* @request: This parameter points to the isci_request object
|
|
* @completion_ptr: This parameter is saved as the kernel completion structure
|
|
* signalled when the old request completes.
|
|
*
|
|
* state previous to any change.
|
|
*/
|
|
static inline enum isci_request_status isci_request_change_started_to_aborted(
|
|
struct isci_request *isci_request,
|
|
struct completion *completion_ptr)
|
|
{
|
|
return isci_request_change_started_to_newstate(
|
|
isci_request, completion_ptr, aborted
|
|
);
|
|
}
|
|
/**
|
|
* isci_request_free() - This function frees the request object.
|
|
* @isci_host: This parameter specifies the ISCI host object
|
|
* @isci_request: This parameter points to the isci_request object
|
|
*
|
|
*/
|
|
static inline void isci_request_free(
|
|
struct isci_host *isci_host,
|
|
struct isci_request *isci_request)
|
|
{
|
|
if (!isci_request)
|
|
return;
|
|
|
|
/* release the dma memory if we fail. */
|
|
dma_pool_free(isci_host->dma_pool, isci_request,
|
|
isci_request->request_daddr);
|
|
}
|
|
|
|
|
|
/* #define ISCI_REQUEST_VALIDATE_ACCESS
|
|
*/
|
|
|
|
#ifdef ISCI_REQUEST_VALIDATE_ACCESS
|
|
|
|
static inline
|
|
struct sas_task *isci_request_access_task(struct isci_request *isci_request)
|
|
{
|
|
BUG_ON(isci_request->ttype != io_task);
|
|
return isci_request->ttype_ptr.io_task_ptr;
|
|
}
|
|
|
|
static inline
|
|
struct isci_tmf *isci_request_access_tmf(struct isci_request *isci_request)
|
|
{
|
|
BUG_ON(isci_request->ttype != tmf_task);
|
|
return isci_request->ttype_ptr.tmf_task_ptr;
|
|
}
|
|
|
|
#else /* not ISCI_REQUEST_VALIDATE_ACCESS */
|
|
|
|
#define isci_request_access_task(RequestPtr) \
|
|
((RequestPtr)->ttype_ptr.io_task_ptr)
|
|
|
|
#define isci_request_access_tmf(RequestPtr) \
|
|
((RequestPtr)->ttype_ptr.tmf_task_ptr)
|
|
|
|
#endif /* not ISCI_REQUEST_VALIDATE_ACCESS */
|
|
|
|
|
|
int isci_request_alloc_tmf(
|
|
struct isci_host *isci_host,
|
|
struct isci_tmf *isci_tmf,
|
|
struct isci_request **isci_request,
|
|
struct isci_remote_device *isci_device,
|
|
gfp_t gfp_flags);
|
|
|
|
|
|
int isci_request_execute(
|
|
struct isci_host *isci_host,
|
|
struct sas_task *task,
|
|
struct isci_request **request,
|
|
gfp_t gfp_flags);
|
|
|
|
/**
|
|
* isci_request_unmap_sgl() - This function unmaps the DMA address of a given
|
|
* sgl
|
|
* @request: This parameter points to the isci_request object
|
|
* @*pdev: This Parameter is the pci_device struct for the controller
|
|
*
|
|
*/
|
|
static inline void isci_request_unmap_sgl(
|
|
struct isci_request *request,
|
|
struct pci_dev *pdev)
|
|
{
|
|
struct sas_task *task = isci_request_access_task(request);
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
"%s: request = %p, task = %p,\n"
|
|
"task->data_dir = %d, is_sata = %d\n ",
|
|
__func__,
|
|
request,
|
|
task,
|
|
task->data_dir,
|
|
sas_protocol_ata(task->task_proto));
|
|
|
|
if ((task->data_dir != PCI_DMA_NONE) &&
|
|
!sas_protocol_ata(task->task_proto)) {
|
|
if (task->num_scatter == 0)
|
|
/* 0 indicates a single dma address */
|
|
dma_unmap_single(
|
|
&pdev->dev,
|
|
request->zero_scatter_daddr,
|
|
task->total_xfer_len,
|
|
task->data_dir
|
|
);
|
|
|
|
else /* unmap the sgl dma addresses */
|
|
dma_unmap_sg(
|
|
&pdev->dev,
|
|
task->scatter,
|
|
request->num_sg_entries,
|
|
task->data_dir
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* isci_request_io_request_get_next_sge() - This function is called by the sci
|
|
* core to retrieve the next sge for a given request.
|
|
* @request: This parameter is the isci_request object.
|
|
* @current_sge_address: This parameter is the last sge retrieved by the sci
|
|
* core for this request.
|
|
*
|
|
* pointer to the next sge for specified request.
|
|
*/
|
|
static inline void *isci_request_io_request_get_next_sge(
|
|
struct isci_request *request,
|
|
void *current_sge_address)
|
|
{
|
|
struct sas_task *task = isci_request_access_task(request);
|
|
void *ret = NULL;
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
"%s: request = %p, "
|
|
"current_sge_address = %p, "
|
|
"num_scatter = %d\n",
|
|
__func__,
|
|
request,
|
|
current_sge_address,
|
|
task->num_scatter);
|
|
|
|
if (!current_sge_address) /* First time through.. */
|
|
ret = task->scatter; /* always task->scatter */
|
|
else if (task->num_scatter == 0) /* Next element, if num_scatter == 0 */
|
|
ret = NULL; /* there is only one element. */
|
|
else
|
|
ret = sg_next(current_sge_address); /* sg_next returns NULL
|
|
* for the last element
|
|
*/
|
|
|
|
dev_dbg(&request->isci_host->pdev->dev,
|
|
"%s: next sge address = %p\n",
|
|
__func__,
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void isci_terminate_pending_requests(struct isci_host *isci_host,
|
|
struct isci_remote_device *isci_device,
|
|
enum isci_request_status new_request_state);
|
|
enum sci_status scic_task_request_construct(struct scic_sds_controller *scic,
|
|
struct scic_sds_remote_device *sci_dev,
|
|
u16 io_tag,
|
|
struct scic_sds_request *sci_req);
|
|
enum sci_status scic_task_request_construct_ssp(struct scic_sds_request *sci_req);
|
|
enum sci_status scic_task_request_construct_sata(struct scic_sds_request *sci_req);
|
|
enum sci_status scic_sds_stp_udma_request_construct(struct scic_sds_request *sci_req,
|
|
u32 transfer_length,
|
|
enum dma_data_direction dir);
|
|
void scic_stp_io_request_set_ncq_tag(struct scic_sds_request *sci_req, u16 ncq_tag);
|
|
void scic_sds_smp_request_copy_response(struct scic_sds_request *sci_req);
|
|
#endif /* !defined(_ISCI_REQUEST_H_) */
|