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
|
/*-
* 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.
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/**
* @file
*
* @brief This file contains the protected interface structures, constants,
* and methods for the SCIF_SAS_STP_REMOTE_DEVICE object.
*/
#include <dev/isci/scil/scif_sas_stp_remote_device.h>
#include <dev/isci/scil/scif_sas_remote_device.h>
#include <dev/isci/scil/scif_sas_domain.h>
#include <dev/isci/scil/scif_sas_controller.h>
#include <dev/isci/scil/scif_sas_logger.h>
#include <dev/isci/scil/intel_sat.h>
/**
* @brief This method performs SATA/STP specific construction of the
* STP remote device object.
*
* @param[in] device This parameter specifies the STP remote device
* object to be constructed.
*
* @return none
*/
void scif_sas_stp_remote_device_construct(
SCIF_SAS_REMOTE_DEVICE_T * device
)
{
sati_device_construct(
&device->protocol_device.stp_device.sati_device,
device->domain->controller->user_parameters.sas.is_sata_ncq_enabled,
(U8) device->domain->controller->user_parameters.sas.max_ncq_depth,
device->domain->controller->user_parameters.sas.ignore_fua
);
device->protocol_device.stp_device.s_active = 0;
}
/**
* @brief This method attempts to allocate a valid NCQ tag from the list
* of available tags in the remote device.
*
* @todo Attempt to find a CLZ like instruction to optimize this routine
* down into a few instructions. I know there is one like it for IA.
*
* @param[in] fw_device This parameter specifies the remote device
* for which to allocate an available NCQ tag.
*
* @return Return an available NCQ tag.
* @retval 0-31 These values indicate an available tag was successfully
* allocated.
* @return SCIF_SAS_STP_INVALID_NCQ_TAG This value indicates that there are
* no available NCQ tags.
*/
U8 scif_sas_stp_remote_device_allocate_ncq_tag(
SCIF_SAS_REMOTE_DEVICE_T * fw_device
)
{
U8 ncq_tag = 0;
U32 tag_mask = 1;
SCIF_LOG_TRACE((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
"scif_sas_stp_remote_device_allocate_ncq_tag(0x%x)\n",
fw_device
));
// Try to find an unused NCQ tag.
while ( (fw_device->protocol_device.stp_device.s_active & tag_mask)
&& (ncq_tag < fw_device->protocol_device.stp_device.sati_device.ncq_depth) )
{
tag_mask <<= 1;
ncq_tag++;
}
// Check to see if we were able to find an available NCQ tag.
if (ncq_tag < fw_device->protocol_device.stp_device.sati_device.ncq_depth)
{
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
"RemoteDevice:0x%x NcqTag:0x%x successful NCQ TAG allocation\n",
fw_device, ncq_tag
));
fw_device->protocol_device.stp_device.s_active |= tag_mask;
return ncq_tag;
}
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
"RemoteDevice:0x%x unable to allocate NCQ TAG\n",
fw_device
));
// All NCQ tags are in use.
return SCIF_SAS_INVALID_NCQ_TAG;
}
/**
* @brief This method removes the specified tag from the list of
* outstanding tags. It doesn't return any values.
*
* @param[in] fw_device This parameter specifies the remote device for
* which to free an NCQ tag.
* @param[in] ncq_tag This parameter specifies the NCQ tag that is
* to be freed.
*
* @return none
*/
void scif_sas_stp_remote_device_free_ncq_tag(
struct SCIF_SAS_REMOTE_DEVICE * fw_device,
U8 ncq_tag
)
{
SCIF_LOG_INFO((
sci_base_object_get_logger(fw_device),
SCIF_LOG_OBJECT_REMOTE_DEVICE | SCIF_LOG_OBJECT_IO_REQUEST,
"RemoteDevice:0x%x NcqTag:0x%x freeing NCQ TAG\n",
fw_device, ncq_tag
));
fw_device->protocol_device.stp_device.s_active &= ~(1 << ncq_tag);
}
struct SCIF_SAS_REQUEST *
scif_sas_stp_remote_device_get_request_by_ncq_tag(
struct SCIF_SAS_REMOTE_DEVICE * fw_device,
U8 ncq_tag
)
{
SCIF_SAS_DOMAIN_T * fw_domain = fw_device->domain;
SCI_FAST_LIST_ELEMENT_T * pending_request_element;
SCIF_SAS_REQUEST_T * pending_request = NULL;
SCIF_SAS_REQUEST_T * matching_request = NULL;
pending_request_element = fw_domain->request_list.list_head;
while (pending_request_element != NULL)
{
pending_request =
(SCIF_SAS_REQUEST_T*) sci_fast_list_get_object(pending_request_element);
// The current element may be deleted from the list becasue of
// IO completion so advance to the next element early
pending_request_element = sci_fast_list_get_next(pending_request_element);
if (
(pending_request->device == fw_device) &&
(pending_request->stp.sequence.protocol == SAT_PROTOCOL_FPDMA) &&
(pending_request->stp.ncq_tag == ncq_tag)
)
{
matching_request = pending_request;
}
}
return matching_request;
}
|
