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Diffstat (limited to 'drivers/scsi/isci/phy.h')
-rw-r--r-- | drivers/scsi/isci/phy.h | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/drivers/scsi/isci/phy.h b/drivers/scsi/isci/phy.h new file mode 100644 index 000000000000..67699c8e321c --- /dev/null +++ b/drivers/scsi/isci/phy.h | |||
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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_PHY_H_ | ||
56 | #define _ISCI_PHY_H_ | ||
57 | |||
58 | #include <scsi/sas.h> | ||
59 | #include <scsi/libsas.h> | ||
60 | #include "isci.h" | ||
61 | #include "sas.h" | ||
62 | |||
63 | /* This is the timeout value for the SATA phy to wait for a SIGNATURE FIS | ||
64 | * before restarting the starting state machine. Technically, the old parallel | ||
65 | * ATA specification required up to 30 seconds for a device to issue its | ||
66 | * signature FIS as a result of a soft reset. Now we see that devices respond | ||
67 | * generally within 15 seconds, but we'll use 25 for now. | ||
68 | */ | ||
69 | #define SCIC_SDS_SIGNATURE_FIS_TIMEOUT 25000 | ||
70 | |||
71 | /* This is the timeout for the SATA OOB/SN because the hardware does not | ||
72 | * recognize a hot plug after OOB signal but before the SN signals. We need to | ||
73 | * make sure after a hotplug timeout if we have not received the speed event | ||
74 | * notification from the hardware that we restart the hardware OOB state | ||
75 | * machine. | ||
76 | */ | ||
77 | #define SCIC_SDS_SATA_LINK_TRAINING_TIMEOUT 250 | ||
78 | |||
79 | enum sci_phy_protocol { | ||
80 | SCIC_SDS_PHY_PROTOCOL_UNKNOWN, | ||
81 | SCIC_SDS_PHY_PROTOCOL_SAS, | ||
82 | SCIC_SDS_PHY_PROTOCOL_SATA, | ||
83 | SCIC_SDS_MAX_PHY_PROTOCOLS | ||
84 | }; | ||
85 | |||
86 | /** | ||
87 | * isci_phy - hba local phy infrastructure | ||
88 | * @sm: | ||
89 | * @protocol: attached device protocol | ||
90 | * @phy_index: physical index relative to the controller (0-3) | ||
91 | * @bcn_received_while_port_unassigned: bcn to report after port association | ||
92 | * @sata_timer: timeout SATA signature FIS arrival | ||
93 | */ | ||
94 | struct isci_phy { | ||
95 | struct sci_base_state_machine sm; | ||
96 | struct isci_port *owning_port; | ||
97 | enum sas_linkrate max_negotiated_speed; | ||
98 | enum sci_phy_protocol protocol; | ||
99 | u8 phy_index; | ||
100 | bool bcn_received_while_port_unassigned; | ||
101 | bool is_in_link_training; | ||
102 | struct sci_timer sata_timer; | ||
103 | struct scu_transport_layer_registers __iomem *transport_layer_registers; | ||
104 | struct scu_link_layer_registers __iomem *link_layer_registers; | ||
105 | struct asd_sas_phy sas_phy; | ||
106 | struct isci_port *isci_port; | ||
107 | u8 sas_addr[SAS_ADDR_SIZE]; | ||
108 | union { | ||
109 | struct sas_identify_frame iaf; | ||
110 | struct dev_to_host_fis fis; | ||
111 | } frame_rcvd; | ||
112 | }; | ||
113 | |||
114 | static inline struct isci_phy *to_iphy(struct asd_sas_phy *sas_phy) | ||
115 | { | ||
116 | struct isci_phy *iphy = container_of(sas_phy, typeof(*iphy), sas_phy); | ||
117 | |||
118 | return iphy; | ||
119 | } | ||
120 | |||
121 | struct sci_phy_cap { | ||
122 | union { | ||
123 | struct { | ||
124 | /* | ||
125 | * The SAS specification indicates the start bit shall | ||
126 | * always be set to | ||
127 | * 1. This implementation will have the start bit set | ||
128 | * to 0 if the PHY CAPABILITIES were either not | ||
129 | * received or speed negotiation failed. | ||
130 | */ | ||
131 | u8 start:1; | ||
132 | u8 tx_ssc_type:1; | ||
133 | u8 res1:2; | ||
134 | u8 req_logical_linkrate:4; | ||
135 | |||
136 | u32 gen1_no_ssc:1; | ||
137 | u32 gen1_ssc:1; | ||
138 | u32 gen2_no_ssc:1; | ||
139 | u32 gen2_ssc:1; | ||
140 | u32 gen3_no_ssc:1; | ||
141 | u32 gen3_ssc:1; | ||
142 | u32 res2:17; | ||
143 | u32 parity:1; | ||
144 | }; | ||
145 | u32 all; | ||
146 | }; | ||
147 | } __packed; | ||
148 | |||
149 | /* this data structure reflects the link layer transmit identification reg */ | ||
150 | struct sci_phy_proto { | ||
151 | union { | ||
152 | struct { | ||
153 | u16 _r_a:1; | ||
154 | u16 smp_iport:1; | ||
155 | u16 stp_iport:1; | ||
156 | u16 ssp_iport:1; | ||
157 | u16 _r_b:4; | ||
158 | u16 _r_c:1; | ||
159 | u16 smp_tport:1; | ||
160 | u16 stp_tport:1; | ||
161 | u16 ssp_tport:1; | ||
162 | u16 _r_d:4; | ||
163 | }; | ||
164 | u16 all; | ||
165 | }; | ||
166 | } __packed; | ||
167 | |||
168 | |||
169 | /** | ||
170 | * struct sci_phy_properties - This structure defines the properties common to | ||
171 | * all phys that can be retrieved. | ||
172 | * | ||
173 | * | ||
174 | */ | ||
175 | struct sci_phy_properties { | ||
176 | /** | ||
177 | * This field specifies the port that currently contains the | ||
178 | * supplied phy. This field may be set to NULL | ||
179 | * if the phy is not currently contained in a port. | ||
180 | */ | ||
181 | struct isci_port *iport; | ||
182 | |||
183 | /** | ||
184 | * This field specifies the link rate at which the phy is | ||
185 | * currently operating. | ||
186 | */ | ||
187 | enum sas_linkrate negotiated_link_rate; | ||
188 | |||
189 | /** | ||
190 | * This field specifies the index of the phy in relation to other | ||
191 | * phys within the controller. This index is zero relative. | ||
192 | */ | ||
193 | u8 index; | ||
194 | }; | ||
195 | |||
196 | /** | ||
197 | * struct sci_sas_phy_properties - This structure defines the properties, | ||
198 | * specific to a SAS phy, that can be retrieved. | ||
199 | * | ||
200 | * | ||
201 | */ | ||
202 | struct sci_sas_phy_properties { | ||
203 | /** | ||
204 | * This field delineates the Identify Address Frame received | ||
205 | * from the remote end point. | ||
206 | */ | ||
207 | struct sas_identify_frame rcvd_iaf; | ||
208 | |||
209 | /** | ||
210 | * This field delineates the Phy capabilities structure received | ||
211 | * from the remote end point. | ||
212 | */ | ||
213 | struct sci_phy_cap rcvd_cap; | ||
214 | |||
215 | }; | ||
216 | |||
217 | /** | ||
218 | * struct sci_sata_phy_properties - This structure defines the properties, | ||
219 | * specific to a SATA phy, that can be retrieved. | ||
220 | * | ||
221 | * | ||
222 | */ | ||
223 | struct sci_sata_phy_properties { | ||
224 | /** | ||
225 | * This field delineates the signature FIS received from the | ||
226 | * attached target. | ||
227 | */ | ||
228 | struct dev_to_host_fis signature_fis; | ||
229 | |||
230 | /** | ||
231 | * This field specifies to the user if a port selector is connected | ||
232 | * on the specified phy. | ||
233 | */ | ||
234 | bool is_port_selector_present; | ||
235 | |||
236 | }; | ||
237 | |||
238 | /** | ||
239 | * enum sci_phy_counter_id - This enumeration depicts the various pieces of | ||
240 | * optional information that can be retrieved for a specific phy. | ||
241 | * | ||
242 | * | ||
243 | */ | ||
244 | enum sci_phy_counter_id { | ||
245 | /** | ||
246 | * This PHY information field tracks the number of frames received. | ||
247 | */ | ||
248 | SCIC_PHY_COUNTER_RECEIVED_FRAME, | ||
249 | |||
250 | /** | ||
251 | * This PHY information field tracks the number of frames transmitted. | ||
252 | */ | ||
253 | SCIC_PHY_COUNTER_TRANSMITTED_FRAME, | ||
254 | |||
255 | /** | ||
256 | * This PHY information field tracks the number of DWORDs received. | ||
257 | */ | ||
258 | SCIC_PHY_COUNTER_RECEIVED_FRAME_WORD, | ||
259 | |||
260 | /** | ||
261 | * This PHY information field tracks the number of DWORDs transmitted. | ||
262 | */ | ||
263 | SCIC_PHY_COUNTER_TRANSMITTED_FRAME_DWORD, | ||
264 | |||
265 | /** | ||
266 | * This PHY information field tracks the number of times DWORD | ||
267 | * synchronization was lost. | ||
268 | */ | ||
269 | SCIC_PHY_COUNTER_LOSS_OF_SYNC_ERROR, | ||
270 | |||
271 | /** | ||
272 | * This PHY information field tracks the number of received DWORDs with | ||
273 | * running disparity errors. | ||
274 | */ | ||
275 | SCIC_PHY_COUNTER_RECEIVED_DISPARITY_ERROR, | ||
276 | |||
277 | /** | ||
278 | * This PHY information field tracks the number of received frames with a | ||
279 | * CRC error (not including short or truncated frames). | ||
280 | */ | ||
281 | SCIC_PHY_COUNTER_RECEIVED_FRAME_CRC_ERROR, | ||
282 | |||
283 | /** | ||
284 | * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT) | ||
285 | * primitives received. | ||
286 | */ | ||
287 | SCIC_PHY_COUNTER_RECEIVED_DONE_ACK_NAK_TIMEOUT, | ||
288 | |||
289 | /** | ||
290 | * This PHY information field tracks the number of DONE (ACK/NAK TIMEOUT) | ||
291 | * primitives transmitted. | ||
292 | */ | ||
293 | SCIC_PHY_COUNTER_TRANSMITTED_DONE_ACK_NAK_TIMEOUT, | ||
294 | |||
295 | /** | ||
296 | * This PHY information field tracks the number of times the inactivity | ||
297 | * timer for connections on the phy has been utilized. | ||
298 | */ | ||
299 | SCIC_PHY_COUNTER_INACTIVITY_TIMER_EXPIRED, | ||
300 | |||
301 | /** | ||
302 | * This PHY information field tracks the number of DONE (CREDIT TIMEOUT) | ||
303 | * primitives received. | ||
304 | */ | ||
305 | SCIC_PHY_COUNTER_RECEIVED_DONE_CREDIT_TIMEOUT, | ||
306 | |||
307 | /** | ||
308 | * This PHY information field tracks the number of DONE (CREDIT TIMEOUT) | ||
309 | * primitives transmitted. | ||
310 | */ | ||
311 | SCIC_PHY_COUNTER_TRANSMITTED_DONE_CREDIT_TIMEOUT, | ||
312 | |||
313 | /** | ||
314 | * This PHY information field tracks the number of CREDIT BLOCKED | ||
315 | * primitives received. | ||
316 | * @note Depending on remote device implementation, credit blocks | ||
317 | * may occur regularly. | ||
318 | */ | ||
319 | SCIC_PHY_COUNTER_RECEIVED_CREDIT_BLOCKED, | ||
320 | |||
321 | /** | ||
322 | * This PHY information field contains the number of short frames | ||
323 | * received. A short frame is simply a frame smaller then what is | ||
324 | * allowed by either the SAS or SATA specification. | ||
325 | */ | ||
326 | SCIC_PHY_COUNTER_RECEIVED_SHORT_FRAME, | ||
327 | |||
328 | /** | ||
329 | * This PHY information field contains the number of frames received after | ||
330 | * credit has been exhausted. | ||
331 | */ | ||
332 | SCIC_PHY_COUNTER_RECEIVED_FRAME_WITHOUT_CREDIT, | ||
333 | |||
334 | /** | ||
335 | * This PHY information field contains the number of frames received after | ||
336 | * a DONE has been received. | ||
337 | */ | ||
338 | SCIC_PHY_COUNTER_RECEIVED_FRAME_AFTER_DONE, | ||
339 | |||
340 | /** | ||
341 | * This PHY information field contains the number of times the phy | ||
342 | * failed to achieve DWORD synchronization during speed negotiation. | ||
343 | */ | ||
344 | SCIC_PHY_COUNTER_SN_DWORD_SYNC_ERROR | ||
345 | }; | ||
346 | |||
347 | enum sci_phy_states { | ||
348 | /** | ||
349 | * Simply the initial state for the base domain state machine. | ||
350 | */ | ||
351 | SCI_PHY_INITIAL, | ||
352 | |||
353 | /** | ||
354 | * This state indicates that the phy has successfully been stopped. | ||
355 | * In this state no new IO operations are permitted on this phy. | ||
356 | * This state is entered from the INITIAL state. | ||
357 | * This state is entered from the STARTING state. | ||
358 | * This state is entered from the READY state. | ||
359 | * This state is entered from the RESETTING state. | ||
360 | */ | ||
361 | SCI_PHY_STOPPED, | ||
362 | |||
363 | /** | ||
364 | * This state indicates that the phy is in the process of becomming | ||
365 | * ready. In this state no new IO operations are permitted on this phy. | ||
366 | * This state is entered from the STOPPED state. | ||
367 | * This state is entered from the READY state. | ||
368 | * This state is entered from the RESETTING state. | ||
369 | */ | ||
370 | SCI_PHY_STARTING, | ||
371 | |||
372 | /** | ||
373 | * Initial state | ||
374 | */ | ||
375 | SCI_PHY_SUB_INITIAL, | ||
376 | |||
377 | /** | ||
378 | * Wait state for the hardware OSSP event type notification | ||
379 | */ | ||
380 | SCI_PHY_SUB_AWAIT_OSSP_EN, | ||
381 | |||
382 | /** | ||
383 | * Wait state for the PHY speed notification | ||
384 | */ | ||
385 | SCI_PHY_SUB_AWAIT_SAS_SPEED_EN, | ||
386 | |||
387 | /** | ||
388 | * Wait state for the IAF Unsolicited frame notification | ||
389 | */ | ||
390 | SCI_PHY_SUB_AWAIT_IAF_UF, | ||
391 | |||
392 | /** | ||
393 | * Wait state for the request to consume power | ||
394 | */ | ||
395 | SCI_PHY_SUB_AWAIT_SAS_POWER, | ||
396 | |||
397 | /** | ||
398 | * Wait state for request to consume power | ||
399 | */ | ||
400 | SCI_PHY_SUB_AWAIT_SATA_POWER, | ||
401 | |||
402 | /** | ||
403 | * Wait state for the SATA PHY notification | ||
404 | */ | ||
405 | SCI_PHY_SUB_AWAIT_SATA_PHY_EN, | ||
406 | |||
407 | /** | ||
408 | * Wait for the SATA PHY speed notification | ||
409 | */ | ||
410 | SCI_PHY_SUB_AWAIT_SATA_SPEED_EN, | ||
411 | |||
412 | /** | ||
413 | * Wait state for the SIGNATURE FIS unsolicited frame notification | ||
414 | */ | ||
415 | SCI_PHY_SUB_AWAIT_SIG_FIS_UF, | ||
416 | |||
417 | /** | ||
418 | * Exit state for this state machine | ||
419 | */ | ||
420 | SCI_PHY_SUB_FINAL, | ||
421 | |||
422 | /** | ||
423 | * This state indicates the the phy is now ready. Thus, the user | ||
424 | * is able to perform IO operations utilizing this phy as long as it | ||
425 | * is currently part of a valid port. | ||
426 | * This state is entered from the STARTING state. | ||
427 | */ | ||
428 | SCI_PHY_READY, | ||
429 | |||
430 | /** | ||
431 | * This state indicates that the phy is in the process of being reset. | ||
432 | * In this state no new IO operations are permitted on this phy. | ||
433 | * This state is entered from the READY state. | ||
434 | */ | ||
435 | SCI_PHY_RESETTING, | ||
436 | |||
437 | /** | ||
438 | * Simply the final state for the base phy state machine. | ||
439 | */ | ||
440 | SCI_PHY_FINAL, | ||
441 | }; | ||
442 | |||
443 | void sci_phy_construct( | ||
444 | struct isci_phy *iphy, | ||
445 | struct isci_port *iport, | ||
446 | u8 phy_index); | ||
447 | |||
448 | struct isci_port *phy_get_non_dummy_port(struct isci_phy *iphy); | ||
449 | |||
450 | void sci_phy_set_port( | ||
451 | struct isci_phy *iphy, | ||
452 | struct isci_port *iport); | ||
453 | |||
454 | enum sci_status sci_phy_initialize( | ||
455 | struct isci_phy *iphy, | ||
456 | struct scu_transport_layer_registers __iomem *transport_layer_registers, | ||
457 | struct scu_link_layer_registers __iomem *link_layer_registers); | ||
458 | |||
459 | enum sci_status sci_phy_start( | ||
460 | struct isci_phy *iphy); | ||
461 | |||
462 | enum sci_status sci_phy_stop( | ||
463 | struct isci_phy *iphy); | ||
464 | |||
465 | enum sci_status sci_phy_reset( | ||
466 | struct isci_phy *iphy); | ||
467 | |||
468 | void sci_phy_resume( | ||
469 | struct isci_phy *iphy); | ||
470 | |||
471 | void sci_phy_setup_transport( | ||
472 | struct isci_phy *iphy, | ||
473 | u32 device_id); | ||
474 | |||
475 | enum sci_status sci_phy_event_handler( | ||
476 | struct isci_phy *iphy, | ||
477 | u32 event_code); | ||
478 | |||
479 | enum sci_status sci_phy_frame_handler( | ||
480 | struct isci_phy *iphy, | ||
481 | u32 frame_index); | ||
482 | |||
483 | enum sci_status sci_phy_consume_power_handler( | ||
484 | struct isci_phy *iphy); | ||
485 | |||
486 | void sci_phy_get_sas_address( | ||
487 | struct isci_phy *iphy, | ||
488 | struct sci_sas_address *sas_address); | ||
489 | |||
490 | void sci_phy_get_attached_sas_address( | ||
491 | struct isci_phy *iphy, | ||
492 | struct sci_sas_address *sas_address); | ||
493 | |||
494 | struct sci_phy_proto; | ||
495 | void sci_phy_get_protocols( | ||
496 | struct isci_phy *iphy, | ||
497 | struct sci_phy_proto *protocols); | ||
498 | enum sas_linkrate sci_phy_linkrate(struct isci_phy *iphy); | ||
499 | |||
500 | struct isci_host; | ||
501 | void isci_phy_init(struct isci_phy *iphy, struct isci_host *ihost, int index); | ||
502 | int isci_phy_control(struct asd_sas_phy *phy, enum phy_func func, void *buf); | ||
503 | |||
504 | #endif /* !defined(_ISCI_PHY_H_) */ | ||