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linux-next/drivers/scsi/isci/task.h
Jeff Skirvin 14aaa9f0a3 isci: Redesign device suspension, abort, cleanup. 
This commit changes the means by which outstanding I/Os are handled
for cleanup.
The likelihood is that this commit will be broken into smaller pieces,
however that will be a later revision.  Among the changes:

- All completion structures have been removed from the tmf and
abort paths.
- Now using one completed I/O list, with the I/O completed in host bit being
used to select error or normal callback paths.

Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2012-05-17 14:33:38 -07:00

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/*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* BSD LICENSE
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _ISCI_TASK_H_
#define _ISCI_TASK_H_
#include <scsi/sas_ata.h>
#include "host.h"
#define ISCI_TERMINATION_TIMEOUT_MSEC 500
struct isci_request;
/**
* enum isci_tmf_function_codes - This enum defines the possible preparations
* of task management requests.
*
*
*/
enum isci_tmf_function_codes {
isci_tmf_func_none = 0,
isci_tmf_ssp_task_abort = TMF_ABORT_TASK,
isci_tmf_ssp_lun_reset = TMF_LU_RESET,
};
/**
* struct isci_tmf - This class represents the task management object which
* acts as an interface to libsas for processing task management requests
*
*
*/
struct isci_tmf {
struct completion *complete;
enum sas_protocol proto;
union {
struct ssp_response_iu resp_iu;
struct dev_to_host_fis d2h_fis;
u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
} resp;
unsigned char lun[8];
u16 io_tag;
enum isci_tmf_function_codes tmf_code;
int status;
};
static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf)
{
if (SAS_PROTOCOL_SATA == tmf->proto)
dev_dbg(&ihost->pdev->dev,
"%s: status = %x\n"
"tmf->resp.d2h_fis.status = %x\n"
"tmf->resp.d2h_fis.error = %x\n",
__func__,
tmf->status,
tmf->resp.d2h_fis.status,
tmf->resp.d2h_fis.error);
else
dev_dbg(&ihost->pdev->dev,
"%s: status = %x\n"
"tmf->resp.resp_iu.data_present = %x\n"
"tmf->resp.resp_iu.status = %x\n"
"tmf->resp.resp_iu.data_length = %x\n"
"tmf->resp.resp_iu.data[0] = %x\n"
"tmf->resp.resp_iu.data[1] = %x\n"
"tmf->resp.resp_iu.data[2] = %x\n"
"tmf->resp.resp_iu.data[3] = %x\n",
__func__,
tmf->status,
tmf->resp.resp_iu.datapres,
tmf->resp.resp_iu.status,
be32_to_cpu(tmf->resp.resp_iu.response_data_len),
tmf->resp.resp_iu.resp_data[0],
tmf->resp.resp_iu.resp_data[1],
tmf->resp.resp_iu.resp_data[2],
tmf->resp.resp_iu.resp_data[3]);
}
int isci_task_execute_task(
struct sas_task *task,
int num,
gfp_t gfp_flags);
int isci_task_abort_task(
struct sas_task *task);
int isci_task_abort_task_set(
struct domain_device *d_device,
u8 *lun);
int isci_task_clear_aca(
struct domain_device *d_device,
u8 *lun);
int isci_task_clear_task_set(
struct domain_device *d_device,
u8 *lun);
int isci_task_query_task(
struct sas_task *task);
int isci_task_lu_reset(
struct domain_device *d_device,
u8 *lun);
int isci_task_clear_nexus_port(
struct asd_sas_port *port);
int isci_task_clear_nexus_ha(
struct sas_ha_struct *ha);
int isci_task_I_T_nexus_reset(
struct domain_device *d_device);
void isci_task_request_complete(
struct isci_host *isci_host,
struct isci_request *request,
enum sci_task_status completion_status);
u16 isci_task_ssp_request_get_io_tag_to_manage(
struct isci_request *request);
u8 isci_task_ssp_request_get_function(
struct isci_request *request);
void *isci_task_ssp_request_get_response_data_address(
struct isci_request *request);
u32 isci_task_ssp_request_get_response_data_length(
struct isci_request *request);
int isci_queuecommand(
struct scsi_cmnd *scsi_cmd,
void (*donefunc)(struct scsi_cmnd *));
#endif /* !defined(_SCI_TASK_H_) */
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