1 /*
2  * This file is provided under a dual BSD/GPLv2 license.  When using or
3  * redistributing this file, you may do so under either license.
4  *
5  * GPL LICENSE SUMMARY
6  *
7  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of version 2 of the GNU General Public License as
11  * published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21  * The full GNU General Public License is included in this distribution
22  * in the file called LICENSE.GPL.
23  *
24  * BSD LICENSE
25  *
26  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
27  * All rights reserved.
28  *
29  * Redistribution and use in source and binary forms, with or without
30  * modification, are permitted provided that the following conditions
31  * are met:
32  *
33  *   * Redistributions of source code must retain the above copyright
34  *     notice, this list of conditions and the following disclaimer.
35  *   * Redistributions in binary form must reproduce the above copyright
36  *     notice, this list of conditions and the following disclaimer in
37  *     the documentation and/or other materials provided with the
38  *     distribution.
39  *   * Neither the name of Intel Corporation nor the names of its
40  *     contributors may be used to endorse or promote products derived
41  *     from this software without specific prior written permission.
42  *
43  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54  */
55 #ifndef _ISCI_TASK_H_
56 #define _ISCI_TASK_H_
57 
58 #include <scsi/sas_ata.h>
59 #include "host.h"
60 
61 #define ISCI_TERMINATION_TIMEOUT_MSEC 500
62 
63 struct isci_request;
64 
65 /**
66  * enum isci_tmf_function_codes - This enum defines the possible preparations
67  *    of task management requests.
68  *
69  *
70  */
71 enum isci_tmf_function_codes {
72 
73 	isci_tmf_func_none      = 0,
74 	isci_tmf_ssp_task_abort = TMF_ABORT_TASK,
75 	isci_tmf_ssp_lun_reset  = TMF_LU_RESET,
76 };
77 
78 /**
79  * struct isci_tmf - This class represents the task management object which
80  *    acts as an interface to libsas for processing task management requests
81  *
82  *
83  */
84 struct isci_tmf {
85 
86 	struct completion *complete;
87 	enum sas_protocol proto;
88 	union {
89 		struct ssp_response_iu resp_iu;
90 		struct dev_to_host_fis d2h_fis;
91 		u8 rsp_buf[SSP_RESP_IU_MAX_SIZE];
92 	} resp;
93 	unsigned char lun[8];
94 	u16 io_tag;
95 	enum isci_tmf_function_codes tmf_code;
96 	int status;
97 };
98 
isci_print_tmf(struct isci_host * ihost,struct isci_tmf * tmf)99 static inline void isci_print_tmf(struct isci_host *ihost, struct isci_tmf *tmf)
100 {
101 	if (SAS_PROTOCOL_SATA == tmf->proto)
102 		dev_dbg(&ihost->pdev->dev,
103 			"%s: status = %x\n"
104 			"tmf->resp.d2h_fis.status = %x\n"
105 			"tmf->resp.d2h_fis.error = %x\n",
106 			__func__,
107 			tmf->status,
108 			tmf->resp.d2h_fis.status,
109 			tmf->resp.d2h_fis.error);
110 	else
111 		dev_dbg(&ihost->pdev->dev,
112 			"%s: status = %x\n"
113 			"tmf->resp.resp_iu.data_present = %x\n"
114 			"tmf->resp.resp_iu.status = %x\n"
115 			"tmf->resp.resp_iu.data_length = %x\n"
116 			"tmf->resp.resp_iu.data[0] = %x\n"
117 			"tmf->resp.resp_iu.data[1] = %x\n"
118 			"tmf->resp.resp_iu.data[2] = %x\n"
119 			"tmf->resp.resp_iu.data[3] = %x\n",
120 			__func__,
121 			tmf->status,
122 			tmf->resp.resp_iu.datapres,
123 			tmf->resp.resp_iu.status,
124 			be32_to_cpu(tmf->resp.resp_iu.response_data_len),
125 			tmf->resp.resp_iu.resp_data[0],
126 			tmf->resp.resp_iu.resp_data[1],
127 			tmf->resp.resp_iu.resp_data[2],
128 			tmf->resp.resp_iu.resp_data[3]);
129 }
130 
131 
132 int isci_task_execute_task(
133 	struct sas_task *task,
134 	gfp_t gfp_flags);
135 
136 int isci_task_abort_task(
137 	struct sas_task *task);
138 
139 int isci_task_abort_task_set(
140 	struct domain_device *d_device,
141 	u8 *lun);
142 
143 int isci_task_clear_task_set(
144 	struct domain_device *d_device,
145 	u8 *lun);
146 
147 int isci_task_query_task(
148 	struct sas_task *task);
149 
150 int isci_task_lu_reset(
151 	struct domain_device *d_device,
152 	u8 *lun);
153 
154 int isci_task_clear_nexus_port(
155 	struct asd_sas_port *port);
156 
157 int isci_task_clear_nexus_ha(
158 	struct sas_ha_struct *ha);
159 
160 int isci_task_I_T_nexus_reset(
161 	struct domain_device *d_device);
162 
163 void isci_task_request_complete(
164 	struct isci_host *isci_host,
165 	struct isci_request *request,
166 	enum sci_task_status completion_status);
167 
168 u16 isci_task_ssp_request_get_io_tag_to_manage(
169 	struct isci_request *request);
170 
171 u8 isci_task_ssp_request_get_function(
172 	struct isci_request *request);
173 
174 
175 void *isci_task_ssp_request_get_response_data_address(
176 	struct isci_request *request);
177 
178 u32 isci_task_ssp_request_get_response_data_length(
179 	struct isci_request *request);
180 
181 #endif /* !defined(_SCI_TASK_H_) */
182