drivers/scsi/isci/core/scic_sds_remote_device.h

   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_DEVICE_H_
  57 #define _SCIC_SDS_REMOTE_DEVICE_H_
  58
  59 /**
  60  * This file contains the structures, constants, and prototypes for the
  61  *    struct scic_sds_remote_device object.
  62  *
  63  *
  64  */
  65
  66 #include "intel_sas.h"
  67 #include "sci_base_remote_device.h"
  68 #include "sci_base_request.h"
  69 #include "scu_remote_node_context.h"
  70 #include "scic_sds_remote_node_context.h"
  71
  72 struct scic_sds_controller;
  73 struct scic_sds_port;
  74 struct scic_sds_request;
  75 struct scic_sds_remote_device_state_handler;
  76
  77 /**
  78  * enum scic_sds_ssp_remote_device_ready_substates -
  79  *
  80  * This is the enumeration of the ready substates for the
  81  * struct scic_sds_remote_device.
  82  */
  83 enum scic_sds_ssp_remote_device_ready_substates {
  84         /**
  85          * This is the initial state for the remote device ready substate.
  86          */
  87         SCIC_SDS_SSP_REMOTE_DEVICE_READY_SUBSTATE_INITIAL,
  88
  89         /**
  90          * This is the ready operational substate for the remote device.
  91          * This is the normal operational state for a remote device.
  92          */
  93         SCIC_SDS_SSP_REMOTE_DEVICE_READY_SUBSTATE_OPERATIONAL,
  94
  95         /**
  96          * This is the suspended state for the remote device. This is the state
  97          * that the device is placed in when a RNC suspend is received by
  98          * the SCU hardware.
  99          */
 100         SCIC_SDS_SSP_REMOTE_DEVICE_READY_SUBSTATE_SUSPENDED,
 101
 102         /**
 103          * This is the final state that the device is placed in before a change
 104          * to the base state machine.
 105          */
 106         SCIC_SDS_SSP_REMOTE_DEVICE_READY_SUBSTATE_FINAL,
 107
 108         SCIC_SDS_SSP_REMOTE_DEVICE_READY_MAX_SUBSTATES
 109 };
 110
 111 /**
 112  * enum scic_sds_stp_remote_device_ready_substates -
 113  *
 114  * This is the enumeration for the struct scic_sds_remote_device ready substates
 115  * for the STP remote device.
 116  */
 117 enum scic_sds_stp_remote_device_ready_substates {
 118         /**
 119          * This is the idle substate for the stp remote device.  When there are no
 120          * active IO for the device it is is in this state.
 121          */
 122         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_IDLE,
 123
 124         /**
 125          * This is the command state for for the STP remote device.  This state is
 126          * entered when the device is processing a non-NCQ command.  The device object
 127          * will fail any new start IO requests until this command is complete.
 128          */
 129         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_CMD,
 130
 131         /**
 132          * This is the NCQ state for the STP remote device.  This state is entered
 133          * when the device is processing an NCQ reuqest.  It will remain in this state
 134          * so long as there is one or more NCQ requests being processed.
 135          */
 136         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ,
 137
 138         /**
 139          * This is the NCQ error state for the STP remote device.  This state is
 140          * entered when an SDB error FIS is received by the device object while in the
 141          * NCQ state.  The device object will only accept a READ LOG command while in
 142          * this state.
 143          */
 144         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_NCQ_ERROR,
 145
 146 #if !defined(DISABLE_ATAPI)
 147         /**
 148          * This is the ATAPI error state for the STP ATAPI remote device.  This state is
 149          * entered when ATAPI device sends error status FIS without data while the device
 150          * object is in CMD state. A suspension event is expected in this state. The device
 151          * object will resume right away.
 152          */
 153         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_ATAPI_ERROR,
 154 #endif
 155
 156         /**
 157          * This is the READY substate indicates the device is waiting for the RESET task
 158          * coming to be recovered from certain hardware specific error.
 159          */
 160         SCIC_SDS_STP_REMOTE_DEVICE_READY_SUBSTATE_AWAIT_RESET,
 161 };
 162
 163 /**
 164  * enum scic_sds_smp_remote_device_ready_substates -
 165  *
 166  * This is the enumeration of the ready substates for the SMP REMOTE DEVICE.
 167  */
 168 enum scic_sds_smp_remote_device_ready_substates {
 169         /**
 170          * This is the ready operational substate for the remote device.  This is the
 171          * normal operational state for a remote device.
 172          */
 173         SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_IDLE,
 174
 175         /**
 176          * This is the suspended state for the remote device.  This is the state that
 177          * the device is placed in when a RNC suspend is received by the SCU hardware.
 178          */
 179         SCIC_SDS_SMP_REMOTE_DEVICE_READY_SUBSTATE_CMD,
 180 };
 181
 182 /**
 183  * struct scic_sds_remote_device - This structure contains the data for an SCU
 184  *    implementation of the SCU Core device data.
 185  *
 186  *
 187  */
 188 struct scic_sds_remote_device {
 189         /**
 190          * This field is the common base for all remote device objects.
 191          */
 192         struct sci_base_remote_device parent;
 193
 194         /**
 195          * This field is the programmed device port width.  This value is written to
 196          * the RCN data structure to tell the SCU how many open connections this
 197          * device can have.
 198          */
 199         u32 device_port_width;
 200
 201         /**
 202          * This field is the programmed connection rate for this remote device.  It is
 203          * used to program the TC with the maximum allowed connection rate.
 204          */
 205         enum sci_sas_link_rate connection_rate;
 206
 207         /**
 208          * This field contains the allowed target protocols for this remote device.
 209          */
 210         struct smp_discover_response_protocols target_protocols;
 211
 212         /**
 213          * This field contains the device SAS address.
 214          */
 215         struct sci_sas_address device_address;
 216
 217         /**
 218          * This filed is assinged the value of true if the device is directly
 219          * attached to the port.
 220          */
 221         bool is_direct_attached;
 222
 223 #if !defined(DISABLE_ATAPI)
 224         /**
 225          * This filed is assinged the value of true if the device is an ATAPI
 226          * device.
 227          */
 228         bool is_atapi;
 229 #endif
 230
 231         /**
 232          * This filed contains a pointer back to the port to which this device
 233          * is assigned.
 234          */
 235         struct scic_sds_port *owning_port;
 236
 237         /**
 238          * This field contains the SCU silicon remote node context specific
 239          * information.
 240          */
 241         struct scic_sds_remote_node_context *rnc;
 242
 243         /**
 244          * This field contains the stated request count for the remote device.  The
 245          * device can not reach the SCI_BASE_REMOTE_DEVICE_STATE_STOPPED until all
 246          * requests are complete and the rnc_posted value is false.
 247          */
 248         u32 started_request_count;
 249
 250         /**
 251          * This field contains a pointer to the working request object.  It is only
 252          * used only for SATA requests since the unsolicited frames we get from the
 253          * hardware have no Tag value to look up the io request object.
 254          */
 255         struct scic_sds_request *working_request;
 256
 257         /**
 258          * This field contains the reason for the remote device going not_ready.  It is
 259          * assigned in the state handlers and used in the state transition.
 260          */
 261         u32 not_ready_reason;
 262
 263         /**
 264          * This field is true if this remote device has an initialzied ready substate
 265          * machine. SSP devices do not have a ready substate machine and STP devices
 266          * have a ready substate machine.
 267          */
 268         bool has_ready_substate_machine;
 269
 270         /**
 271          * This field contains the state machine for the ready substate machine for
 272          * this struct scic_sds_remote_device object.
 273          */
 274         struct sci_base_state_machine ready_substate_machine;
 275
 276         /**
 277          * This field maintains the set of state handlers for the remote device
 278          * object.  These are changed each time the remote device enters a new state.
 279          */
 280         const struct scic_sds_remote_device_state_handler *state_handlers;
 281 };
 282
 283 typedef enum sci_status (*scic_sds_remote_device_handler_t)(
 284         struct scic_sds_remote_device *this_device);
 285
 286 typedef enum sci_status (*scic_sds_remote_device_suspend_handler_t)(
 287         struct scic_sds_remote_device *this_device,
 288         u32 suspend_type);
 289
 290 typedef enum sci_status (*scic_sds_remote_device_resume_handler_t)(
 291         struct scic_sds_remote_device *this_device);
 292
 293 typedef enum sci_status (*scic_sds_remote_device_frame_handler_t)(
 294         struct scic_sds_remote_device *this_device,
 295         u32 frame_index);
 296
 297 typedef enum sci_status (*scic_sds_remote_device_event_handler_t)(
 298         struct scic_sds_remote_device *this_device,
 299         u32 event_code);
 300
 301 typedef void (*scic_sds_remote_device_ready_not_ready_handler_t)(
 302         struct scic_sds_remote_device *this_device);
 303
 304 /**
 305  * struct scic_sds_remote_device_state_handler - This structure conains the
 306  *    state handlers that are needed to process requests for the SCU remote
 307  *    device objects.
 308  *
 309  *
 310  */
 311 struct scic_sds_remote_device_state_handler {
 312         struct sci_base_remote_device_state_handler parent;
 313         scic_sds_remote_device_suspend_handler_t suspend_handler;
 314         scic_sds_remote_device_resume_handler_t resume_handler;
 315         scic_sds_remote_device_event_handler_t event_handler;
 316         scic_sds_remote_device_frame_handler_t frame_handler;
 317 };
 318
 319 extern const struct sci_base_state scic_sds_remote_device_state_table[];
 320 extern const struct sci_base_state scic_sds_ssp_remote_device_ready_substate_table[];
 321 extern const struct sci_base_state scic_sds_stp_remote_device_ready_substate_table[];
 322 extern const struct sci_base_state scic_sds_smp_remote_device_ready_substate_table[];
 323
 324 extern const struct scic_sds_remote_device_state_handler scic_sds_remote_device_state_handler_table[];
 325 extern const struct scic_sds_remote_device_state_handler scic_sds_stp_remote_device_ready_substate_handler_table[];
 326 extern const struct scic_sds_remote_device_state_handler scic_sds_smp_remote_device_ready_substate_handler_table[];
 327
 328 /**
 329  * scic_sds_remote_device_increment_request_count() -
 330  *
 331  * This macro incrments the request count for this device
 332  */
 333 #define scic_sds_remote_device_increment_request_count(this_device) \
 334         ((this_device)->started_request_count++)
 335
 336 /**
 337  * scic_sds_remote_device_decrement_request_count() -
 338  *
 339  * This macro decrements the request count for this device.  This count will
 340  * never decrment past 0.
 341  */
 342 #define scic_sds_remote_device_decrement_request_count(this_device) \
 343         ((this_device)->started_request_count > 0 ? \
 344          (this_device)->started_request_count-- : 0)
 345
 346 /**
 347  * scic_sds_remote_device_get_request_count() -
 348  *
 349  * This is a helper macro to return the current device request count.
 350  */
 351 #define scic_sds_remote_device_get_request_count(this_device) \
 352         ((this_device)->started_request_count)
 353
 354 /**
 355  * scic_sds_remote_device_get_port() -
 356  *
 357  * This macro returns the owning port of this remote device obejct.
 358  */
 359 #define scic_sds_remote_device_get_port(this_device) \
 360         ((this_device)->owning_port)
 361
 362 /**
 363  * scic_sds_remote_device_get_controller() -
 364  *
 365  * This macro returns the controller object that contains this device object
 366  */
 367 #define scic_sds_remote_device_get_controller(this_device) \
 368         scic_sds_port_get_controller(scic_sds_remote_device_get_port(this_device))
 369
 370 /**
 371  * scic_sds_remote_device_set_state_handlers() -
 372  *
 373  * This macro sets the remote device state handlers pointer and is set on entry
 374  * to each device state.
 375  */
 376 #define scic_sds_remote_device_set_state_handlers(this_device, handlers) \
 377         ((this_device)->state_handlers = (handlers))
 378
 379 /**
 380  * scic_sds_remote_device_get_base_state_machine() -
 381  *
 382  * This macro returns the base sate machine object for the remote device.
 383  */
 384 #define scic_sds_remote_device_get_base_state_machine(this_device) \
 385         (&(this_device)->parent.state_machine)
 386
 387 /**
 388  * scic_sds_remote_device_get_ready_substate_machine() -
 389  *
 390  * This macro returns the remote device ready substate machine
 391  */
 392 #define scic_sds_remote_device_get_ready_substate_machine(this_device) \
 393         (&(this_device)->ready_substate_machine)
 394
 395 /**
 396  * scic_sds_remote_device_get_port() -
 397  *
 398  * This macro returns the owning port of this device
 399  */
 400 #define scic_sds_remote_device_get_port(this_device) \
 401         ((this_device)->owning_port)
 402
 403 /**
 404  * scic_sds_remote_device_get_sequence() -
 405  *
 406  * This macro returns the remote device sequence value
 407  */
 408 #define scic_sds_remote_device_get_sequence(this_device) \
 409         (\
 410                 scic_sds_remote_device_get_controller(this_device)-> \
 411                 remote_device_sequence[(this_device)->rnc->remote_node_index] \
 412         )
 413
 414 /**
 415  * scic_sds_remote_device_get_controller_peg() -
 416  *
 417  * This macro returns the controllers protocol engine group
 418  */
 419 #define scic_sds_remote_device_get_controller_peg(this_device) \
 420         (\
 421                 scic_sds_controller_get_protocol_engine_group(\
 422                         scic_sds_port_get_controller(\
 423                                 scic_sds_remote_device_get_port(this_device) \
 424                                 ) \
 425                         ) \
 426         )
 427
 428 /**
 429  * scic_sds_remote_device_get_port_index() -
 430  *
 431  * This macro returns the port index for the devices owning port
 432  */
 433 #define scic_sds_remote_device_get_port_index(this_device) \
 434         (scic_sds_port_get_index(scic_sds_remote_device_get_port(this_device)))
 435
 436 /**
 437  * scic_sds_remote_device_get_index() -
 438  *
 439  * This macro returns the remote node index for this device object
 440  */
 441 #define scic_sds_remote_device_get_index(this_device) \
 442         ((this_device)->rnc->remote_node_index)
 443
 444 /**
 445  * scic_sds_remote_device_build_command_context() -
 446  *
 447  * This macro builds a remote device context for the SCU post request operation
 448  */
 449 #define scic_sds_remote_device_build_command_context(device, command) \
 450         ((command) \
 451          | (scic_sds_remote_device_get_controller_peg((device)) << SCU_CONTEXT_COMMAND_PROTOCOL_ENGINE_GROUP_SHIFT) \
 452          | (scic_sds_remote_device_get_port_index((device)) << SCU_CONTEXT_COMMAND_LOGICAL_PORT_SHIFT) \
 453          | (scic_sds_remote_device_get_index((device))) \
 454         )
 455
 456 /**
 457  * scic_sds_remote_device_set_working_request() -
 458  *
 459  * This macro makes the working request assingment for the remote device
 460  * object. To clear the working request use this macro with a NULL request
 461  * object.
 462  */
 463 #define scic_sds_remote_device_set_working_request(device, request) \
 464         ((device)->working_request = (request))
 465
 466 enum sci_status scic_sds_remote_device_frame_handler(
 467         struct scic_sds_remote_device *this_device,
 468         u32 frame_index);
 469
 470 enum sci_status scic_sds_remote_device_event_handler(
 471         struct scic_sds_remote_device *this_device,
 472         u32 event_code);
 473
 474 enum sci_status scic_sds_remote_device_start_io(
 475         struct scic_sds_controller *controller,
 476         struct scic_sds_remote_device *this_device,
 477         struct scic_sds_request *io_request);
 478
 479 enum sci_status scic_sds_remote_device_complete_io(
 480         struct scic_sds_controller *controller,
 481         struct scic_sds_remote_device *this_device,
 482         struct scic_sds_request *io_request);
 483
 484 enum sci_status scic_sds_remote_device_resume(
 485         struct scic_sds_remote_device *this_device);
 486
 487 enum sci_status scic_sds_remote_device_suspend(
 488         struct scic_sds_remote_device *this_device,
 489         u32 suspend_type);
 490
 491 enum sci_status scic_sds_remote_device_start_task(
 492         struct scic_sds_controller *controller,
 493         struct scic_sds_remote_device *this_device,
 494         struct scic_sds_request *io_request);
 495
 496 void scic_sds_remote_device_post_request(
 497         struct scic_sds_remote_device *this_device,
 498         u32 request);
 499
 500 #if !defined(DISABLE_ATAPI)
 501 bool scic_sds_remote_device_is_atapi(
 502         struct scic_sds_remote_device *this_device);
 503 #else /* !defined(DISABLE_ATAPI) */
 504 #define scic_sds_remote_device_is_atapi(this_device) false
 505 #endif /* !defined(DISABLE_ATAPI) */
 506
 507 void scic_sds_remote_device_start_request(
 508         struct scic_sds_remote_device *this_device,
 509         struct scic_sds_request *the_request,
 510         enum sci_status status);
 511
 512 void scic_sds_remote_device_continue_request(void *sci_dev);
 513
 514 enum sci_status scic_sds_remote_device_default_start_handler(
 515         struct sci_base_remote_device *this_device);
 516
 517 enum sci_status scic_sds_remote_device_default_fail_handler(
 518         struct sci_base_remote_device *this_device);
 519
 520 enum sci_status scic_sds_remote_device_default_destruct_handler(
 521         struct sci_base_remote_device *this_device);
 522
 523 enum sci_status scic_sds_remote_device_default_reset_handler(
 524         struct sci_base_remote_device *device);
 525
 526 enum sci_status scic_sds_remote_device_default_reset_complete_handler(
 527         struct sci_base_remote_device *device);
 528
 529 enum sci_status scic_sds_remote_device_default_start_request_handler(
 530         struct sci_base_remote_device *device,
 531         struct sci_base_request *request);
 532
 533 enum sci_status scic_sds_remote_device_default_complete_request_handler(
 534         struct sci_base_remote_device *device,
 535         struct sci_base_request *request);
 536
 537 enum sci_status scic_sds_remote_device_default_continue_request_handler(
 538         struct sci_base_remote_device *device,
 539         struct sci_base_request *request);
 540
 541 enum sci_status scic_sds_remote_device_default_suspend_handler(
 542         struct scic_sds_remote_device *this_device,
 543         u32 suspend_type);
 544
 545 enum sci_status scic_sds_remote_device_default_resume_handler(
 546         struct scic_sds_remote_device *this_device);
 547
 548
 549 enum sci_status scic_sds_remote_device_default_frame_handler(
 550         struct scic_sds_remote_device *this_device,
 551         u32 frame_index);
 552
 553 enum sci_status scic_sds_remote_device_ready_state_stop_handler(
 554         struct sci_base_remote_device *device);
 555
 556 enum sci_status scic_sds_remote_device_ready_state_reset_handler(
 557         struct sci_base_remote_device *device);
 558
 559 enum sci_status scic_sds_remote_device_general_frame_handler(
 560         struct scic_sds_remote_device *this_device,
 561         u32 frame_index);
 562
 563 enum sci_status scic_sds_remote_device_general_event_handler(
 564         struct scic_sds_remote_device *this_device,
 565         u32 event_code);
 566
 567 enum sci_status scic_sds_ssp_remote_device_ready_suspended_substate_resume_handler(
 568         struct scic_sds_remote_device *this_device);
 569
 570 #endif /* _SCIC_SDS_REMOTE_DEVICE_H_ */