mirror of https://gitee.com/openkylin/linux.git
648 lines
18 KiB
C
648 lines
18 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
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* at request constuction time.
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*
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* @todo Should we just decrement this value for each
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* byte of data transitted or received to elemenate
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* 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
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* frames since the start of the IO request. At the
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* 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
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* 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
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* to wait for another FIS or if the transfer is
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* 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
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* error field if the ending_status has the
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* 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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int sgl_index;
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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
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* 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
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* machine.
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*/
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struct sci_base_state_machine sm;
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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
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* request 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 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
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* 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.
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* It 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
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* (e.g. Post_TC, * 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 *tc;
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/* could be larger with sg chaining */
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#define SCU_SGL_SIZE ((SCI_MAX_SCATTER_GATHER_ELEMENTS + 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
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* STP internal requests and SMP response frames. If this field is
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* non-NULL the 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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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_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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/* 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_REQ_INIT,
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/*
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* This state indicates that the request has been constructed.
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* This state is entered from the INITIAL state.
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*/
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SCI_REQ_CONSTRUCTED,
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/*
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* This state indicates that the request has been started. This state
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* is entered from the CONSTRUCTED state.
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*/
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SCI_REQ_STARTED,
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SCI_REQ_STP_UDMA_WAIT_TC_COMP,
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SCI_REQ_STP_UDMA_WAIT_D2H,
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SCI_REQ_STP_NON_DATA_WAIT_H2D,
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SCI_REQ_STP_NON_DATA_WAIT_D2H,
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SCI_REQ_STP_SOFT_RESET_WAIT_H2D_ASSERTED,
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SCI_REQ_STP_SOFT_RESET_WAIT_H2D_DIAG,
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SCI_REQ_STP_SOFT_RESET_WAIT_D2H,
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/*
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* While in this state the IO request object is waiting for the TC
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* completion notification for the H2D Register FIS
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*/
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SCI_REQ_STP_PIO_WAIT_H2D,
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/*
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* While in this state the IO request object is waiting for either a
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* PIO Setup FIS or a D2H register FIS. The type of frame received is
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* based on the result of the prior frame and line conditions.
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*/
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SCI_REQ_STP_PIO_WAIT_FRAME,
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/*
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* While in this state the IO request object is waiting for a DATA
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* frame from the device.
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*/
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SCI_REQ_STP_PIO_DATA_IN,
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/*
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* While in this state the IO request object is waiting to transmit
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* the next data frame to the device.
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*/
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SCI_REQ_STP_PIO_DATA_OUT,
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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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SCI_REQ_TASK_WAIT_TC_COMP,
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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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SCI_REQ_TASK_WAIT_TC_RESP,
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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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SCI_REQ_SMP_WAIT_RESP,
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/*
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* The AWAIT_TC_COMPLETION sub-state indicates that the started SMP
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* request is waiting for the transmission of the initial frame
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* (i.e. command, task, etc.).
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*/
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SCI_REQ_SMP_WAIT_TC_COMP,
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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
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* from the ABORTING state.
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*/
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SCI_REQ_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_REQ_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_REQ_FINAL,
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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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enum sci_status scic_sds_request_start(struct scic_sds_request *sci_req);
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enum sci_status scic_sds_io_request_terminate(struct scic_sds_request *sci_req);
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enum sci_status
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scic_sds_io_request_event_handler(struct scic_sds_request *sci_req,
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u32 event_code);
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enum sci_status
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scic_sds_io_request_frame_handler(struct scic_sds_request *sci_req,
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u32 frame_index);
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enum sci_status
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scic_sds_task_request_terminate(struct scic_sds_request *sci_req);
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extern enum sci_status
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scic_sds_request_complete(struct scic_sds_request *sci_req);
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extern enum sci_status
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scic_sds_io_request_tc_completion(struct scic_sds_request *sci_req, u32 code);
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/* XXX open code in caller */
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static inline dma_addr_t
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scic_io_request_get_dma_addr(struct scic_sds_request *sci_req, void *virt_addr)
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{
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struct isci_request *ireq = sci_req_to_ireq(sci_req);
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char *requested_addr = (char *)virt_addr;
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char *base_addr = (char *)ireq;
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BUG_ON(requested_addr < base_addr);
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BUG_ON((requested_addr - base_addr) >= sizeof(*ireq));
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return ireq->request_daddr + (requested_addr - base_addr);
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}
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/**
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* This function gets the status of the request object.
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* @request: This parameter points to the isci_request object
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*
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* status of the object as a isci_request_status enum.
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*/
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static inline enum isci_request_status
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isci_request_get_state(struct isci_request *isci_request)
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{
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BUG_ON(isci_request == NULL);
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/*probably a bad sign... */
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if (isci_request->status == unallocated)
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dev_warn(&isci_request->isci_host->pdev->dev,
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"%s: isci_request->status == unallocated\n",
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__func__);
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return isci_request->status;
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}
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/**
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* isci_request_change_state() - This function sets the status of the request
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* object.
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* @request: This parameter points to the isci_request object
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* @status: This Parameter is the new status of the object
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*
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*/
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static inline enum isci_request_status
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isci_request_change_state(struct isci_request *isci_request,
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enum isci_request_status status)
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{
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enum isci_request_status old_state;
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unsigned long flags;
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dev_dbg(&isci_request->isci_host->pdev->dev,
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"%s: isci_request = %p, state = 0x%x\n",
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__func__,
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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_access_task(req) ((req)->ttype_ptr.io_task_ptr)
|
|
|
|
#define isci_request_access_tmf(req) ((req)->ttype_ptr.tmf_task_ptr)
|
|
|
|
struct isci_request *isci_request_alloc_tmf(struct isci_host *ihost,
|
|
struct isci_tmf *isci_tmf,
|
|
gfp_t gfp_flags);
|
|
int isci_request_execute(struct isci_host *ihost, struct isci_remote_device *idev,
|
|
struct sas_task *task, u16 tag, gfp_t gfp_flags);
|
|
void isci_terminate_pending_requests(struct isci_host *ihost,
|
|
struct isci_remote_device *idev);
|
|
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);
|
|
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);
|
|
|
|
static inline int isci_task_is_ncq_recovery(struct sas_task *task)
|
|
{
|
|
return (sas_protocol_ata(task->task_proto) &&
|
|
task->ata_task.fis.command == ATA_CMD_READ_LOG_EXT &&
|
|
task->ata_task.fis.lbal == ATA_LOG_SATA_NCQ);
|
|
|
|
}
|
|
|
|
#endif /* !defined(_ISCI_REQUEST_H_) */
|