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6f231dda DW |
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 | ||
56 | #ifndef _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ | |
57 | #define _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ | |
58 | ||
59 | /** | |
60 | * This file contains the structures, constants, and prototypes associated with | |
61 | * the remote node context in the silicon. It exists to model and manage | |
62 | * the remote node context in the silicon. | |
63 | * | |
64 | * | |
65 | */ | |
66 | ||
12ef6544 | 67 | #include "isci.h" |
6f231dda | 68 | |
6f231dda DW |
69 | /** |
70 | * | |
71 | * | |
72 | * This constant represents an invalid remote device id, it is used to program | |
73 | * the STPDARNI register so the driver knows when it has received a SIGNATURE | |
74 | * FIS from the SCU. | |
75 | */ | |
76 | #define SCIC_SDS_REMOTE_NODE_CONTEXT_INVALID_INDEX 0x0FFF | |
77 | ||
ac78ed0f | 78 | enum sci_remote_node_suspension_reasons { |
c94fc1ad JS |
79 | SCI_HW_SUSPEND, |
80 | SCI_SW_SUSPEND_NORMAL, | |
81 | SCI_SW_SUSPEND_LINKHANG_DETECT | |
ac78ed0f JS |
82 | }; |
83 | #define SCI_SOFTWARE_SUSPEND_CMD SCU_CONTEXT_COMMAND_POST_RNC_SUSPEND_TX_RX | |
84 | #define SCI_SOFTWARE_SUSPEND_EXPECTED_EVENT SCU_EVENT_TL_RNC_SUSPEND_TX_RX | |
6f231dda | 85 | |
5076a1a9 | 86 | struct isci_request; |
78a6f06e | 87 | struct isci_remote_device; |
89a7301f | 88 | struct sci_remote_node_context; |
6f231dda | 89 | |
7fbafaa5 | 90 | typedef void (*scics_sds_remote_node_context_callback)(void *); |
6f231dda | 91 | |
6f231dda | 92 | /** |
d7a0ccdd DW |
93 | * enum sci_remote_node_context_states |
94 | * @SCI_RNC_INITIAL initial state for a remote node context. On a resume | |
95 | * request the remote node context will transition to the posting state. | |
96 | * | |
97 | * @SCI_RNC_POSTING: transition state that posts the RNi to the hardware. Once | |
98 | * the RNC is posted the remote node context will be made ready. | |
99 | * | |
100 | * @SCI_RNC_INVALIDATING: transition state that will post an RNC invalidate to | |
101 | * the hardware. Once the invalidate is complete the remote node context will | |
102 | * transition to the posting state. | |
103 | * | |
104 | * @SCI_RNC_RESUMING: transition state that will post an RNC resume to the | |
105 | * hardare. Once the event notification of resume complete is received the | |
106 | * remote node context will transition to the ready state. | |
107 | * | |
108 | * @SCI_RNC_READY: state that the remote node context must be in to accept io | |
109 | * request operations. | |
110 | * | |
111 | * @SCI_RNC_TX_SUSPENDED: state that the remote node context transitions to when | |
112 | * it gets a TX suspend notification from the hardware. | |
113 | * | |
114 | * @SCI_RNC_TX_RX_SUSPENDED: state that the remote node context transitions to | |
115 | * when it gets a TX RX suspend notification from the hardware. | |
116 | * | |
117 | * @SCI_RNC_AWAIT_SUSPENSION: wait state for the remote node context that waits | |
118 | * for a suspend notification from the hardware. This state is entered when | |
119 | * either there is a request to supend the remote node context or when there is | |
120 | * a TC completion where the remote node will be suspended by the hardware. | |
6f231dda | 121 | */ |
d7a0ccdd DW |
122 | #define RNC_STATES {\ |
123 | C(RNC_INITIAL),\ | |
124 | C(RNC_POSTING),\ | |
125 | C(RNC_INVALIDATING),\ | |
126 | C(RNC_RESUMING),\ | |
127 | C(RNC_READY),\ | |
128 | C(RNC_TX_SUSPENDED),\ | |
129 | C(RNC_TX_RX_SUSPENDED),\ | |
130 | C(RNC_AWAIT_SUSPENSION),\ | |
131 | } | |
132 | #undef C | |
133 | #define C(a) SCI_##a | |
134 | enum scis_sds_remote_node_context_states RNC_STATES; | |
135 | #undef C | |
136 | const char *rnc_state_name(enum scis_sds_remote_node_context_states state); | |
6f231dda DW |
137 | |
138 | /** | |
139 | * | |
140 | * | |
141 | * This enumeration is used to define the end destination state for the remote | |
142 | * node context. | |
143 | */ | |
89a7301f | 144 | enum sci_remote_node_context_destination_state { |
59e35396 JS |
145 | RNC_DEST_UNSPECIFIED, |
146 | RNC_DEST_READY, | |
147 | RNC_DEST_FINAL, | |
148 | RNC_DEST_SUSPENDED, /* Set when suspend during post/invalidate */ | |
149 | RNC_DEST_SUSPENDED_RESUME /* Set when a resume was done during posting | |
150 | * or invalidating and already suspending. | |
151 | */ | |
6f231dda DW |
152 | }; |
153 | ||
154 | /** | |
89a7301f | 155 | * struct sci_remote_node_context - This structure contains the data |
6f231dda DW |
156 | * associated with the remote node context object. The remote node context |
157 | * (RNC) object models the the remote device information necessary to manage | |
158 | * the silicon RNC. | |
6f231dda | 159 | */ |
89a7301f | 160 | struct sci_remote_node_context { |
6f231dda DW |
161 | /** |
162 | * This field indicates the remote node index (RNI) associated with | |
163 | * this RNC. | |
164 | */ | |
165 | u16 remote_node_index; | |
166 | ||
167 | /** | |
ac78ed0f | 168 | * This field is the recored suspension type of the remote node |
6f231dda DW |
169 | * context suspension. |
170 | */ | |
ac78ed0f | 171 | u32 suspend_type; |
447bfbce | 172 | enum sci_remote_node_suspension_reasons suspend_reason; |
31a38ef0 | 173 | u32 suspend_count; |
6f231dda DW |
174 | |
175 | /** | |
176 | * This field is true if the remote node context is resuming from its current | |
177 | * state. This can cause an automatic resume on receiving a suspension | |
178 | * notification. | |
179 | */ | |
89a7301f | 180 | enum sci_remote_node_context_destination_state destination_state; |
6f231dda DW |
181 | |
182 | /** | |
183 | * This field contains the callback function that the user requested to be | |
184 | * called when the requested state transition is complete. | |
185 | */ | |
7fbafaa5 | 186 | scics_sds_remote_node_context_callback user_callback; |
6f231dda DW |
187 | |
188 | /** | |
189 | * This field contains the parameter that is called when the user requested | |
190 | * state transition is completed. | |
191 | */ | |
192 | void *user_cookie; | |
193 | ||
194 | /** | |
195 | * This field contains the data for the object's state machine. | |
196 | */ | |
e301370a | 197 | struct sci_base_state_machine sm; |
6f231dda DW |
198 | }; |
199 | ||
89a7301f | 200 | void sci_remote_node_context_construct(struct sci_remote_node_context *rnc, |
9614395e | 201 | u16 remote_node_index); |
6f231dda | 202 | |
6f231dda | 203 | |
89a7301f DW |
204 | bool sci_remote_node_context_is_ready( |
205 | struct sci_remote_node_context *sci_rnc); | |
6f231dda | 206 | |
31a38ef0 JS |
207 | bool sci_remote_node_context_is_suspended(struct sci_remote_node_context *sci_rnc); |
208 | ||
89a7301f | 209 | enum sci_status sci_remote_node_context_event_handler(struct sci_remote_node_context *sci_rnc, |
338e386d | 210 | u32 event_code); |
89a7301f | 211 | enum sci_status sci_remote_node_context_destruct(struct sci_remote_node_context *sci_rnc, |
c845ae96 DW |
212 | scics_sds_remote_node_context_callback callback, |
213 | void *callback_parameter); | |
89a7301f | 214 | enum sci_status sci_remote_node_context_suspend(struct sci_remote_node_context *sci_rnc, |
ed3efb77 | 215 | u32 suspend_type, |
447bfbce | 216 | u32 suspension_code); |
89a7301f | 217 | enum sci_status sci_remote_node_context_resume(struct sci_remote_node_context *sci_rnc, |
ed3efb77 DW |
218 | scics_sds_remote_node_context_callback cb_fn, |
219 | void *cb_p); | |
89a7301f | 220 | enum sci_status sci_remote_node_context_start_task(struct sci_remote_node_context *sci_rnc, |
14aaa9f0 JS |
221 | struct isci_request *ireq, |
222 | scics_sds_remote_node_context_callback cb_fn, | |
223 | void *cb_p); | |
89a7301f | 224 | enum sci_status sci_remote_node_context_start_io(struct sci_remote_node_context *sci_rnc, |
5076a1a9 | 225 | struct isci_request *ireq); |
726980d5 JS |
226 | int sci_remote_node_context_is_safe_to_abort( |
227 | struct sci_remote_node_context *sci_rnc); | |
6f231dda | 228 | |
1f053889 JS |
229 | static inline bool sci_remote_node_context_is_being_destroyed( |
230 | struct sci_remote_node_context *sci_rnc) | |
231 | { | |
de2eb4d5 JS |
232 | return (sci_rnc->destination_state == RNC_DEST_FINAL) |
233 | || ((sci_rnc->sm.current_state_id == SCI_RNC_INITIAL) | |
234 | && (sci_rnc->destination_state == RNC_DEST_UNSPECIFIED)); | |
1f053889 | 235 | } |
6f231dda | 236 | #endif /* _SCIC_SDS_REMOTE_NODE_CONTEXT_H_ */ |