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 __ISCI_H__
57 #define __ISCI_H__
58
59 #include <linux/interrupt.h>
60 #include <linux/types.h>
61
62 #define DRV_NAME "isci"
63 #define SCI_PCI_BAR_COUNT 2
64 #define SCI_NUM_MSI_X_INT 2
65 #define SCI_SMU_BAR 0
66 #define SCI_SMU_BAR_SIZE (16*1024)
67 #define SCI_SCU_BAR 1
68 #define SCI_SCU_BAR_SIZE (4*1024*1024)
69 #define SCI_IO_SPACE_BAR0 2
70 #define SCI_IO_SPACE_BAR1 3
71 #define ISCI_CAN_QUEUE_VAL 250 /* < SCI_MAX_IO_REQUESTS ? */
72 #define SCIC_CONTROLLER_STOP_TIMEOUT 5000
73
74 #define SCI_CONTROLLER_INVALID_IO_TAG 0xFFFF
75
76 #define SCI_MAX_PHYS (4UL)
77 #define SCI_MAX_PORTS SCI_MAX_PHYS
78 #define SCI_MAX_SMP_PHYS (384) /* not silicon constrained */
79 #define SCI_MAX_REMOTE_DEVICES (256UL)
80 #define SCI_MAX_IO_REQUESTS (256UL)
81 #define SCI_MAX_SEQ (16)
82 #define SCI_MAX_MSIX_MESSAGES (2)
83 #define SCI_MAX_SCATTER_GATHER_ELEMENTS 130 /* not silicon constrained */
84 #define SCI_MAX_CONTROLLERS 2
85 #define SCI_MAX_DOMAINS SCI_MAX_PORTS
86
87 #define SCU_MAX_CRITICAL_NOTIFICATIONS (384)
88 #define SCU_MAX_EVENTS_SHIFT (7)
89 #define SCU_MAX_EVENTS (1 << SCU_MAX_EVENTS_SHIFT)
90 #define SCU_MAX_UNSOLICITED_FRAMES (128)
91 #define SCU_MAX_COMPLETION_QUEUE_SCRATCH (128)
92 #define SCU_MAX_COMPLETION_QUEUE_ENTRIES (SCU_MAX_CRITICAL_NOTIFICATIONS \
93 + SCU_MAX_EVENTS \
94 + SCU_MAX_UNSOLICITED_FRAMES \
95 + SCI_MAX_IO_REQUESTS \
96 + SCU_MAX_COMPLETION_QUEUE_SCRATCH)
97 #define SCU_MAX_COMPLETION_QUEUE_SHIFT (ilog2(SCU_MAX_COMPLETION_QUEUE_ENTRIES))
98
99 #define SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES (4096)
100 #define SCU_UNSOLICITED_FRAME_BUFFER_SIZE (1024U)
101 #define SCU_INVALID_FRAME_INDEX (0xFFFF)
102
103 #define SCU_IO_REQUEST_MAX_SGE_SIZE (0x00FFFFFF)
104 #define SCU_IO_REQUEST_MAX_TRANSFER_LENGTH (0x00FFFFFF)
105
106 static inline void check_sizes(void)
107 {
108 BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_EVENTS);
109 BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES <= 8);
110 BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_UNSOLICITED_FRAMES);
111 BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES);
112 BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES);
113 BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS);
114 BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_SEQ);
115 }
116
117 /**
118 * enum sci_status - This is the general return status enumeration for non-IO,
119 * non-task management related SCI interface methods.
120 *
121 *
122 */
123 enum sci_status {
124 /**
125 * This member indicates successful completion.
126 */
127 SCI_SUCCESS = 0,
128
129 /**
130 * This value indicates that the calling method completed successfully,
131 * but that the IO may have completed before having it's start method
132 * invoked. This occurs during SAT translation for requests that do
133 * not require an IO to the target or for any other requests that may
134 * be completed without having to submit IO.
135 */
136 SCI_SUCCESS_IO_COMPLETE_BEFORE_START,
137
138 /**
139 * This Value indicates that the SCU hardware returned an early response
140 * because the io request specified more data than is returned by the
141 * target device (mode pages, inquiry data, etc.). The completion routine
142 * will handle this case to get the actual number of bytes transferred.
143 */
144 SCI_SUCCESS_IO_DONE_EARLY,
145
146 /**
147 * This member indicates that the object for which a state change is
148 * being requested is already in said state.
149 */
150 SCI_WARNING_ALREADY_IN_STATE,
151
152 /**
153 * This member indicates interrupt coalescence timer may cause SAS
154 * specification compliance issues (i.e. SMP target mode response
155 * frames must be returned within 1.9 milliseconds).
156 */
157 SCI_WARNING_TIMER_CONFLICT,
158
159 /**
160 * This field indicates a sequence of action is not completed yet. Mostly,
161 * this status is used when multiple ATA commands are needed in a SATI translation.
162 */
163 SCI_WARNING_SEQUENCE_INCOMPLETE,
164
165 /**
166 * This member indicates that there was a general failure.
167 */
168 SCI_FAILURE,
169
170 /**
171 * This member indicates that the SCI implementation is unable to complete
172 * an operation due to a critical flaw the prevents any further operation
173 * (i.e. an invalid pointer).
174 */
175 SCI_FATAL_ERROR,
176
177 /**
178 * This member indicates the calling function failed, because the state
179 * of the controller is in a state that prevents successful completion.
180 */
181 SCI_FAILURE_INVALID_STATE,
182
183 /**
184 * This member indicates the calling function failed, because there is
185 * insufficient resources/memory to complete the request.
186 */
187 SCI_FAILURE_INSUFFICIENT_RESOURCES,
188
189 /**
190 * This member indicates the calling function failed, because the
191 * controller object required for the operation can't be located.
192 */
193 SCI_FAILURE_CONTROLLER_NOT_FOUND,
194
195 /**
196 * This member indicates the calling function failed, because the
197 * discovered controller type is not supported by the library.
198 */
199 SCI_FAILURE_UNSUPPORTED_CONTROLLER_TYPE,
200
201 /**
202 * This member indicates the calling function failed, because the
203 * requested initialization data version isn't supported.
204 */
205 SCI_FAILURE_UNSUPPORTED_INIT_DATA_VERSION,
206
207 /**
208 * This member indicates the calling function failed, because the
209 * requested configuration of SAS Phys into SAS Ports is not supported.
210 */
211 SCI_FAILURE_UNSUPPORTED_PORT_CONFIGURATION,
212
213 /**
214 * This member indicates the calling function failed, because the
215 * requested protocol is not supported by the remote device, port,
216 * or controller.
217 */
218 SCI_FAILURE_UNSUPPORTED_PROTOCOL,
219
220 /**
221 * This member indicates the calling function failed, because the
222 * requested information type is not supported by the SCI implementation.
223 */
224 SCI_FAILURE_UNSUPPORTED_INFORMATION_TYPE,
225
226 /**
227 * This member indicates the calling function failed, because the
228 * device already exists.
229 */
230 SCI_FAILURE_DEVICE_EXISTS,
231
232 /**
233 * This member indicates the calling function failed, because adding
234 * a phy to the object is not possible.
235 */
236 SCI_FAILURE_ADDING_PHY_UNSUPPORTED,
237
238 /**
239 * This member indicates the calling function failed, because the
240 * requested information type is not supported by the SCI implementation.
241 */
242 SCI_FAILURE_UNSUPPORTED_INFORMATION_FIELD,
243
244 /**
245 * This member indicates the calling function failed, because the SCI
246 * implementation does not support the supplied time limit.
247 */
248 SCI_FAILURE_UNSUPPORTED_TIME_LIMIT,
249
250 /**
251 * This member indicates the calling method failed, because the SCI
252 * implementation does not contain the specified Phy.
253 */
254 SCI_FAILURE_INVALID_PHY,
255
256 /**
257 * This member indicates the calling method failed, because the SCI
258 * implementation does not contain the specified Port.
259 */
260 SCI_FAILURE_INVALID_PORT,
261
262 /**
263 * This member indicates the calling method was partly successful
264 * The port was reset but not all phys in port are operational
265 */
266 SCI_FAILURE_RESET_PORT_PARTIAL_SUCCESS,
267
268 /**
269 * This member indicates that calling method failed
270 * The port reset did not complete because none of the phys are operational
271 */
272 SCI_FAILURE_RESET_PORT_FAILURE,
273
274 /**
275 * This member indicates the calling method failed, because the SCI
276 * implementation does not contain the specified remote device.
277 */
278 SCI_FAILURE_INVALID_REMOTE_DEVICE,
279
280 /**
281 * This member indicates the calling method failed, because the remote
282 * device is in a bad state and requires a reset.
283 */
284 SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
285
286 /**
287 * This member indicates the calling method failed, because the SCI
288 * implementation does not contain or support the specified IO tag.
289 */
290 SCI_FAILURE_INVALID_IO_TAG,
291
292 /**
293 * This member indicates that the operation failed and the user should
294 * check the response data associated with the IO.
295 */
296 SCI_FAILURE_IO_RESPONSE_VALID,
297
298 /**
299 * This member indicates that the operation failed, the failure is
300 * controller implementation specific, and the response data associated
301 * with the request is not valid. You can query for the controller
302 * specific error information via sci_controller_get_request_status()
303 */
304 SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
305
306 /**
307 * This member indicated that the operation failed because the
308 * user requested this IO to be terminated.
309 */
310 SCI_FAILURE_IO_TERMINATED,
311
312 /**
313 * This member indicates that the operation failed and the associated
314 * request requires a SCSI abort task to be sent to the target.
315 */
316 SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,
317
318 /**
319 * This member indicates that the operation failed because the supplied
320 * device could not be located.
321 */
322 SCI_FAILURE_DEVICE_NOT_FOUND,
323
324 /**
325 * This member indicates that the operation failed because the
326 * objects association is required and is not correctly set.
327 */
328 SCI_FAILURE_INVALID_ASSOCIATION,
329
330 /**
331 * This member indicates that the operation failed, because a timeout
332 * occurred.
333 */
334 SCI_FAILURE_TIMEOUT,
335
336 /**
337 * This member indicates that the operation failed, because the user
338 * specified a value that is either invalid or not supported.
339 */
340 SCI_FAILURE_INVALID_PARAMETER_VALUE,
341
342 /**
343 * This value indicates that the operation failed, because the number
344 * of messages (MSI-X) is not supported.
345 */
346 SCI_FAILURE_UNSUPPORTED_MESSAGE_COUNT,
347
348 /**
349 * This value indicates that the method failed due to a lack of
350 * available NCQ tags.
351 */
352 SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,
353
354 /**
355 * This value indicates that a protocol violation has occurred on the
356 * link.
357 */
358 SCI_FAILURE_PROTOCOL_VIOLATION,
359
360 /**
361 * This value indicates a failure condition that retry may help to clear.
362 */
363 SCI_FAILURE_RETRY_REQUIRED,
364
365 /**
366 * This field indicates the retry limit was reached when a retry is attempted
367 */
368 SCI_FAILURE_RETRY_LIMIT_REACHED,
369
370 /**
371 * This member indicates the calling method was partly successful.
372 * Mostly, this status is used when a LUN_RESET issued to an expander attached
373 * STP device in READY NCQ substate needs to have RNC suspended/resumed
374 * before posting TC.
375 */
376 SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS,
377
378 /**
379 * This field indicates an illegal phy connection based on the routing attribute
380 * of both expander phy attached to each other.
381 */
382 SCI_FAILURE_ILLEGAL_ROUTING_ATTRIBUTE_CONFIGURATION,
383
384 /**
385 * This field indicates a CONFIG ROUTE INFO command has a response with function result
386 * INDEX DOES NOT EXIST, usually means exceeding max route index.
387 */
388 SCI_FAILURE_EXCEED_MAX_ROUTE_INDEX,
389
390 /**
391 * This value indicates that an unsupported PCI device ID has been
392 * specified. This indicates that attempts to invoke
393 * sci_library_allocate_controller() will fail.
394 */
395 SCI_FAILURE_UNSUPPORTED_PCI_DEVICE_ID
396
397 };
398
399 /**
400 * enum sci_io_status - This enumeration depicts all of the possible IO
401 * completion status values. Each value in this enumeration maps directly
402 * to a value in the enum sci_status enumeration. Please refer to that
403 * enumeration for detailed comments concerning what the status represents.
404 *
405 * Add the API to retrieve the SCU status from the core. Check to see that the
406 * following status are properly handled: - SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL
407 * - SCI_IO_FAILURE_INVALID_IO_TAG
408 */
409 enum sci_io_status {
410 SCI_IO_SUCCESS = SCI_SUCCESS,
411 SCI_IO_FAILURE = SCI_FAILURE,
412 SCI_IO_SUCCESS_COMPLETE_BEFORE_START = SCI_SUCCESS_IO_COMPLETE_BEFORE_START,
413 SCI_IO_SUCCESS_IO_DONE_EARLY = SCI_SUCCESS_IO_DONE_EARLY,
414 SCI_IO_FAILURE_INVALID_STATE = SCI_FAILURE_INVALID_STATE,
415 SCI_IO_FAILURE_INSUFFICIENT_RESOURCES = SCI_FAILURE_INSUFFICIENT_RESOURCES,
416 SCI_IO_FAILURE_UNSUPPORTED_PROTOCOL = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
417 SCI_IO_FAILURE_RESPONSE_VALID = SCI_FAILURE_IO_RESPONSE_VALID,
418 SCI_IO_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
419 SCI_IO_FAILURE_TERMINATED = SCI_FAILURE_IO_TERMINATED,
420 SCI_IO_FAILURE_REQUIRES_SCSI_ABORT = SCI_FAILURE_IO_REQUIRES_SCSI_ABORT,
421 SCI_IO_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,
422 SCI_IO_FAILURE_NO_NCQ_TAG_AVAILABLE = SCI_FAILURE_NO_NCQ_TAG_AVAILABLE,
423 SCI_IO_FAILURE_PROTOCOL_VIOLATION = SCI_FAILURE_PROTOCOL_VIOLATION,
424
425 SCI_IO_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
426
427 SCI_IO_FAILURE_RETRY_REQUIRED = SCI_FAILURE_RETRY_REQUIRED,
428 SCI_IO_FAILURE_RETRY_LIMIT_REACHED = SCI_FAILURE_RETRY_LIMIT_REACHED,
429 SCI_IO_FAILURE_INVALID_REMOTE_DEVICE = SCI_FAILURE_INVALID_REMOTE_DEVICE
430 };
431
432 /**
433 * enum sci_task_status - This enumeration depicts all of the possible task
434 * completion status values. Each value in this enumeration maps directly
435 * to a value in the enum sci_status enumeration. Please refer to that
436 * enumeration for detailed comments concerning what the status represents.
437 *
438 * Check to see that the following status are properly handled:
439 */
440 enum sci_task_status {
441 SCI_TASK_SUCCESS = SCI_SUCCESS,
442 SCI_TASK_FAILURE = SCI_FAILURE,
443 SCI_TASK_FAILURE_INVALID_STATE = SCI_FAILURE_INVALID_STATE,
444 SCI_TASK_FAILURE_INSUFFICIENT_RESOURCES = SCI_FAILURE_INSUFFICIENT_RESOURCES,
445 SCI_TASK_FAILURE_UNSUPPORTED_PROTOCOL = SCI_FAILURE_UNSUPPORTED_PROTOCOL,
446 SCI_TASK_FAILURE_INVALID_TAG = SCI_FAILURE_INVALID_IO_TAG,
447 SCI_TASK_FAILURE_RESPONSE_VALID = SCI_FAILURE_IO_RESPONSE_VALID,
448 SCI_TASK_FAILURE_CONTROLLER_SPECIFIC_ERR = SCI_FAILURE_CONTROLLER_SPECIFIC_IO_ERR,
449 SCI_TASK_FAILURE_TERMINATED = SCI_FAILURE_IO_TERMINATED,
450 SCI_TASK_FAILURE_INVALID_PARAMETER_VALUE = SCI_FAILURE_INVALID_PARAMETER_VALUE,
451
452 SCI_TASK_FAILURE_REMOTE_DEVICE_RESET_REQUIRED = SCI_FAILURE_REMOTE_DEVICE_RESET_REQUIRED,
453 SCI_TASK_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS = SCI_FAILURE_RESET_DEVICE_PARTIAL_SUCCESS
454
455 };
456
457 /**
458 * sci_swab32_cpy - convert between scsi and scu-hardware byte format
459 * @dest: receive the 4-byte endian swapped version of src
460 * @src: word aligned source buffer
461 *
462 * scu hardware handles SSP/SMP control, response, and unidentified
463 * frames in "big endian dword" order. Regardless of host endian this
464 * is always a swab32()-per-dword conversion of the standard definition,
465 * i.e. single byte fields swapped and multi-byte fields in little-
466 * endian
467 */
468 static inline void sci_swab32_cpy(void *_dest, void *_src, ssize_t word_cnt)
469 {
470 u32 *dest = _dest, *src = _src;
471
472 while (--word_cnt >= 0)
473 dest[word_cnt] = swab32(src[word_cnt]);
474 }
475
476 extern unsigned char no_outbound_task_to;
477 extern u16 ssp_max_occ_to;
478 extern u16 stp_max_occ_to;
479 extern u16 ssp_inactive_to;
480 extern u16 stp_inactive_to;
481 extern unsigned char phy_gen;
482 extern unsigned char max_concurr_spinup;
483 extern uint cable_selection_override;
484
485 irqreturn_t isci_msix_isr(int vec, void *data);
486 irqreturn_t isci_intx_isr(int vec, void *data);
487 irqreturn_t isci_error_isr(int vec, void *data);
488
489 /*
490 * Each timer is associated with a cancellation flag that is set when
491 * del_timer() is called and checked in the timer callback function. This
492 * is needed since del_timer_sync() cannot be called with sci_lock held.
493 * For deinit however, del_timer_sync() is used without holding the lock.
494 */
495 struct sci_timer {
496 struct timer_list timer;
497 bool cancel;
498 };
499
500 static inline
501 void sci_init_timer(struct sci_timer *tmr, void (*fn)(struct timer_list *t))
502 {
503 tmr->cancel = 0;
504 timer_setup(&tmr->timer, fn, 0);
505 }
506
507 static inline void sci_mod_timer(struct sci_timer *tmr, unsigned long msec)
508 {
509 tmr->cancel = 0;
510 mod_timer(&tmr->timer, jiffies + msecs_to_jiffies(msec));
511 }
512
513 static inline void sci_del_timer(struct sci_timer *tmr)
514 {
515 tmr->cancel = 1;
516 del_timer(&tmr->timer);
517 }
518
519 struct sci_base_state_machine {
520 const struct sci_base_state *state_table;
521 u32 initial_state_id;
522 u32 current_state_id;
523 u32 previous_state_id;
524 };
525
526 typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm);
527
528 struct sci_base_state {
529 sci_state_transition_t enter_state; /* Called on state entry */
530 sci_state_transition_t exit_state; /* Called on state exit */
531 };
532
533 extern void sci_init_sm(struct sci_base_state_machine *sm,
534 const struct sci_base_state *state_table,
535 u32 initial_state);
536 extern void sci_change_state(struct sci_base_state_machine *sm, u32 next_state);
537 #endif /* __ISCI_H__ */