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
|
/*
* 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 _SCIC_SDS_REMOTE_NODE_TABLE_H_
#define _SCIC_SDS_REMOTE_NODE_TABLE_H_
#include "isci.h"
/**
*
*
* Remote node sets are sets of remote node index in the remote node table. The
* SCU hardware requires that STP remote node entries take three consecutive
* remote node index so the table is arranged in sets of three. The bits are
* used as 0111 0111 to make a byte and the bits define the set of three remote
* nodes to use as a sequence.
*/
#define SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE 2
/**
*
*
* Since the remote node table is organized as DWORDS take the remote node sets
* in bytes and represent them in DWORDs. The lowest ordered bits are the ones
* used in case full DWORD is not being used. i.e. 0000 0000 0000 0000 0111
* 0111 0111 0111 // if only a single WORD is in use in the DWORD.
*/
#define SCIC_SDS_REMOTE_NODE_SETS_PER_DWORD \
(sizeof(u32) * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE)
/**
*
*
* This is a count of the numeber of remote nodes that can be represented in a
* byte
*/
#define SCIC_SDS_REMOTE_NODES_PER_BYTE \
(SCU_STP_REMOTE_NODE_COUNT * SCIC_SDS_REMOTE_NODE_SETS_PER_BYTE)
/**
*
*
* This is a count of the number of remote nodes that can be represented in a
* DWROD
*/
#define SCIC_SDS_REMOTE_NODES_PER_DWORD \
(sizeof(u32) * SCIC_SDS_REMOTE_NODES_PER_BYTE)
/**
*
*
* This is the number of bits in a remote node group
*/
#define SCIC_SDS_REMOTE_NODES_BITS_PER_GROUP 4
#define SCIC_SDS_REMOTE_NODE_TABLE_INVALID_INDEX (0xFFFFFFFF)
#define SCIC_SDS_REMOTE_NODE_TABLE_FULL_SLOT_VALUE (0x07)
#define SCIC_SDS_REMOTE_NODE_TABLE_EMPTY_SLOT_VALUE (0x00)
/**
*
*
* Expander attached sata remote node count
*/
#define SCU_STP_REMOTE_NODE_COUNT 3
/**
*
*
* Expander or direct attached ssp remote node count
*/
#define SCU_SSP_REMOTE_NODE_COUNT 1
/**
*
*
* Direct attached STP remote node count
*/
#define SCU_SATA_REMOTE_NODE_COUNT 1
/**
* struct sci_remote_node_table -
*
*
*/
struct sci_remote_node_table {
/**
* This field contains the array size in dwords
*/
u16 available_nodes_array_size;
/**
* This field contains the array size of the
*/
u16 group_array_size;
/**
* This field is the array of available remote node entries in bits.
* Because of the way STP remote node data is allocated on the SCU hardware
* the remote nodes must occupy three consecutive remote node context
* entries. For ease of allocation and de-allocation we have broken the
* sets of three into a single nibble. When the STP RNi is allocated all
* of the bits in the nibble are cleared. This math results in a table size
* of MAX_REMOTE_NODES / CONSECUTIVE RNi ENTRIES for STP / 2 entries per byte.
*/
u32 available_remote_nodes[
(SCI_MAX_REMOTE_DEVICES / SCIC_SDS_REMOTE_NODES_PER_DWORD)
+ ((SCI_MAX_REMOTE_DEVICES % SCIC_SDS_REMOTE_NODES_PER_DWORD) != 0)];
/**
* This field is the nibble selector for the above table. There are three
* possible selectors each for fast lookup when trying to find one, two or
* three remote node entries.
*/
u32 remote_node_groups[
SCU_STP_REMOTE_NODE_COUNT][
(SCI_MAX_REMOTE_DEVICES / (32 * SCU_STP_REMOTE_NODE_COUNT))
+ ((SCI_MAX_REMOTE_DEVICES % (32 * SCU_STP_REMOTE_NODE_COUNT)) != 0)];
};
/* --------------------------------------------------------------------------- */
void sci_remote_node_table_initialize(
struct sci_remote_node_table *remote_node_table,
u32 remote_node_entries);
u16 sci_remote_node_table_allocate_remote_node(
struct sci_remote_node_table *remote_node_table,
u32 remote_node_count);
void sci_remote_node_table_release_remote_node_index(
struct sci_remote_node_table *remote_node_table,
u32 remote_node_count,
u16 remote_node_index);
#endif /* _SCIC_SDS_REMOTE_NODE_TABLE_H_ */
|
