1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* 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.
*/
#include <scsi/sas.h>
#include "isci.h"
#include "remote_device.h"
#include "task.h"
#include "request.h"
#include "sata.h"
/**
* isci_sata_task_to_fis_copy() - This function gets the host_to_dev_fis from
* the core and copies the fis from the task into it.
* @task: This parameter is a pointer to the task struct from libsas.
*
* pointer to the host_to_dev_fis from the core request object.
*/
struct host_to_dev_fis *isci_sata_task_to_fis_copy(struct sas_task *task)
{
struct isci_request *ireq = task->lldd_task;
struct host_to_dev_fis *fis = &ireq->stp.cmd;
memcpy(fis, &task->ata_task.fis, sizeof(struct host_to_dev_fis));
if (!task->ata_task.device_control_reg_update)
fis->flags |= 0x80;
fis->flags &= 0xF0;
return fis;
}
/**
* isci_sata_is_task_ncq() - This function determines if the given stp task is
* a ncq request.
* @task: This parameter is a pointer to the task struct from libsas.
*
* true if the task is ncq
*/
bool isci_sata_is_task_ncq(struct sas_task *task)
{
struct ata_queued_cmd *qc = task->uldd_task;
bool ret = (qc &&
(qc->tf.command == ATA_CMD_FPDMA_WRITE ||
qc->tf.command == ATA_CMD_FPDMA_READ));
return ret;
}
/**
* isci_sata_set_ncq_tag() - This function sets the ncq tag field in the
* host_to_dev_fis equal to the tag in the queue command in the task.
* @task: This parameter is a pointer to the task struct from libsas.
* @register_fis: This parameter is a pointer to the host_to_dev_fis from the
* core request object.
*
*/
void isci_sata_set_ncq_tag(
struct host_to_dev_fis *register_fis,
struct sas_task *task)
{
struct ata_queued_cmd *qc = task->uldd_task;
struct isci_request *request = task->lldd_task;
register_fis->sector_count = qc->tag << 3;
scic_stp_io_request_set_ncq_tag(request, qc->tag);
}
/**
* isci_request_process_stp_response() - This function sets the status and
* response, in the task struct, from the request object for the upper layer
* driver.
* @sas_task: This parameter is the task struct from the upper layer driver.
* @response_buffer: This parameter points to the response of the completed
* request.
*
* none.
*/
void isci_request_process_stp_response(struct sas_task *task,
void *response_buffer)
{
struct dev_to_host_fis *d2h_reg_fis = response_buffer;
struct task_status_struct *ts = &task->task_status;
struct ata_task_resp *resp = (void *)&ts->buf[0];
resp->frame_len = le16_to_cpu(*(__le16 *)(response_buffer + 6));
memcpy(&resp->ending_fis[0], response_buffer + 16, 24);
ts->buf_valid_size = sizeof(*resp);
/**
* If the device fault bit is set in the status register, then
* set the sense data and return.
*/
if (d2h_reg_fis->status & ATA_DF)
ts->stat = SAS_PROTO_RESPONSE;
else
ts->stat = SAM_STAT_GOOD;
ts->resp = SAS_TASK_COMPLETE;
}
enum sci_status isci_sata_management_task_request_build(struct isci_request *ireq)
{
struct isci_tmf *isci_tmf;
enum sci_status status;
if (tmf_task != ireq->ttype)
return SCI_FAILURE;
isci_tmf = isci_request_access_tmf(ireq);
switch (isci_tmf->tmf_code) {
case isci_tmf_sata_srst_high:
case isci_tmf_sata_srst_low: {
struct host_to_dev_fis *fis = &ireq->stp.cmd;
memset(fis, 0, sizeof(*fis));
fis->fis_type = 0x27;
fis->flags &= ~0x80;
fis->flags &= 0xF0;
if (isci_tmf->tmf_code == isci_tmf_sata_srst_high)
fis->control |= ATA_SRST;
else
fis->control &= ~ATA_SRST;
break;
}
/* other management commnd go here... */
default:
return SCI_FAILURE;
}
/* core builds the protocol specific request
* based on the h2d fis.
*/
status = scic_task_request_construct_sata(ireq);
return status;
}
/**
* isci_task_send_lu_reset_sata() - This function is called by of the SAS
* Domain Template functions. This is one of the Task Management functoins
* called by libsas, to reset the given SAS lun. Note the assumption that
* while this call is executing, no I/O will be sent by the host to the
* device.
* @lun: This parameter specifies the lun to be reset.
*
* status, zero indicates success.
*/
int isci_task_send_lu_reset_sata(
struct isci_host *isci_host,
struct isci_remote_device *isci_device,
u8 *lun)
{
struct isci_tmf tmf;
int ret = TMF_RESP_FUNC_FAILED;
/* Send the soft reset to the target */
#define ISCI_SRST_TIMEOUT_MS 25000 /* 25 second timeout. */
isci_task_build_tmf(&tmf, isci_tmf_sata_srst_high, NULL, NULL);
ret = isci_task_execute_tmf(isci_host, isci_device, &tmf,
ISCI_SRST_TIMEOUT_MS);
if (ret != TMF_RESP_FUNC_COMPLETE) {
dev_warn(&isci_host->pdev->dev,
"%s: Assert SRST failed (%p) = %x",
__func__,
isci_device,
ret);
/* Return the failure so that the LUN reset is escalated
* to a target reset.
*/
}
return ret;
}
|
