drivers/scsi/isci/host.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 #ifndef _SCI_HOST_H_
  56 #define _SCI_HOST_H_
  57
  58 #include "remote_device.h"
  59 #include "phy.h"
  60 #include "pool.h"
  61 #include "state_machine.h"
  62 #include "remote_node_table.h"
  63 #include "registers.h"
  64 #include "scu_unsolicited_frame.h"
  65 #include "unsolicited_frame_control.h"
  66 #include "probe_roms.h"
  67
  68 struct scic_sds_request;
  69 struct scu_task_context;
  70
  71
  72 /**
  73  * struct scic_power_control -
  74  *
  75  * This structure defines the fields for managing power control for direct
  76  * attached disk devices.
  77  */
  78 struct scic_power_control {
  79         /**
  80          * This field is set when the power control timer is running and cleared when
  81          * it is not.
  82          */
  83         bool timer_started;
  84
  85         /**
  86          * Timer to control when the directed attached disks can consume power.
  87          */
  88         struct sci_timer timer;
  89
  90         /**
  91          * This field is used to keep track of how many phys are put into the
  92          * requesters field.
  93          */
  94         u8 phys_waiting;
  95
  96         /**
  97          * This field is used to keep track of how many phys have been granted to consume power
  98          */
  99         u8 phys_granted_power;
 100
 101         /**
 102          * This field is an array of phys that we are waiting on. The phys are direct
 103          * mapped into requesters via struct scic_sds_phy.phy_index
 104          */
 105         struct scic_sds_phy *requesters[SCI_MAX_PHYS];
 106
 107 };
 108
 109 struct scic_sds_port_configuration_agent;
 110 typedef void (*port_config_fn)(struct scic_sds_controller *,
 111                                struct scic_sds_port_configuration_agent *,
 112                                struct scic_sds_port *, struct scic_sds_phy *);
 113
 114 struct scic_sds_port_configuration_agent {
 115         u16 phy_configured_mask;
 116         u16 phy_ready_mask;
 117         struct {
 118                 u8 min_index;
 119                 u8 max_index;
 120         } phy_valid_port_range[SCI_MAX_PHYS];
 121         bool timer_pending;
 122         port_config_fn link_up_handler;
 123         port_config_fn link_down_handler;
 124         struct sci_timer        timer;
 125 };
 126
 127 /**
 128  * struct scic_sds_controller -
 129  *
 130  * This structure represents the SCU controller object.
 131  */
 132 struct scic_sds_controller {
 133         /**
 134          * This field contains the information for the base controller state
 135          * machine.
 136          */
 137         struct sci_base_state_machine state_machine;
 138
 139         /**
 140          * Timer for controller start/stop operations.
 141          */
 142         struct sci_timer timer;
 143
 144         /**
 145          * This field contains the user parameters to be utilized for this
 146          * core controller object.
 147          */
 148         union scic_user_parameters user_parameters;
 149
 150         /**
 151          * This field contains the OEM parameters to be utilized for this
 152          * core controller object.
 153          */
 154         union scic_oem_parameters oem_parameters;
 155
 156         /**
 157          * This field contains the port configuration agent for this controller.
 158          */
 159         struct scic_sds_port_configuration_agent port_agent;
 160
 161         /**
 162          * This field is the array of device objects that are currently constructed
 163          * for this controller object.  This table is used as a fast lookup of device
 164          * objects that need to handle device completion notifications from the
 165          * hardware. The table is RNi based.
 166          */
 167         struct scic_sds_remote_device *device_table[SCI_MAX_REMOTE_DEVICES];
 168
 169         /**
 170          * This field is the array of IO request objects that are currently active for
 171          * this controller object.  This table is used as a fast lookup of the io
 172          * request object that need to handle completion queue notifications.  The
 173          * table is TCi based.
 174          */
 175         struct scic_sds_request *io_request_table[SCI_MAX_IO_REQUESTS];
 176
 177         /**
 178          * This field is the free RNi data structure
 179          */
 180         struct scic_remote_node_table available_remote_nodes;
 181
 182         /**
 183          * This field is the TCi pool used to manage the task context index.
 184          */
 185         SCI_POOL_CREATE(tci_pool, u16, SCI_MAX_IO_REQUESTS);
 186
 187         /**
 188          * This filed is the struct scic_power_control data used to controll when direct
 189          * attached devices can consume power.
 190          */
 191         struct scic_power_control power_control;
 192
 193         /**
 194          * This field is the array of sequence values for the IO Tag fields.  Even
 195          * though only 4 bits of the field is used for the sequence the sequence is 16
 196          * bits in size so the sequence can be bitwise or'd with the TCi to build the
 197          * IO Tag value.
 198          */
 199         u16 io_request_sequence[SCI_MAX_IO_REQUESTS];
 200
 201         /**
 202          * This field in the array of sequence values for the RNi.  These are used
 203          * to control io request build to io request start operations.  The sequence
 204          * value is recorded into an io request when it is built and is checked on
 205          * the io request start operation to make sure that there was not a device
 206          * hot plug between the build and start operation.
 207          */
 208         u8 remote_device_sequence[SCI_MAX_REMOTE_DEVICES];
 209
 210         /**
 211          * This field is a pointer to the memory allocated by the driver for the task
 212          * context table.  This data is shared between the hardware and software.
 213          */
 214         struct scu_task_context *task_context_table;
 215
 216         /**
 217          * This field is a pointer to the memory allocated by the driver for the
 218          * remote node context table.  This table is shared between the hardware and
 219          * software.
 220          */
 221         union scu_remote_node_context *remote_node_context_table;
 222
 223         /**
 224          * This field is a pointer to the completion queue.  This memory is
 225          * written to by the hardware and read by the software.
 226          */
 227         u32 *completion_queue;
 228
 229         /**
 230          * This field is the software copy of the completion queue get pointer.  The
 231          * controller object writes this value to the hardware after processing the
 232          * completion entries.
 233          */
 234         u32 completion_queue_get;
 235
 236         /**
 237          * This field is the minimum of the number of hardware supported port entries
 238          * and the software requested port entries.
 239          */
 240         u32 logical_port_entries;
 241
 242         /**
 243          * This field is the minimum number of hardware supported completion queue
 244          * entries and the software requested completion queue entries.
 245          */
 246         u32 completion_queue_entries;
 247
 248         /**
 249          * This field is the minimum number of hardware supported event entries and
 250          * the software requested event entries.
 251          */
 252         u32 completion_event_entries;
 253
 254         /**
 255          * This field is the minimum number of devices supported by the hardware and
 256          * the number of devices requested by the software.
 257          */
 258         u32 remote_node_entries;
 259
 260         /**
 261          * This field is the minimum number of IO requests supported by the hardware
 262          * and the number of IO requests requested by the software.
 263          */
 264         u32 task_context_entries;
 265
 266         /**
 267          * This object contains all of the unsolicited frame specific
 268          * data utilized by the core controller.
 269          */
 270         struct scic_sds_unsolicited_frame_control uf_control;
 271
 272         /* Phy Startup Data */
 273         /**
 274          * Timer for controller phy request startup. On controller start the
 275          * controller will start each PHY individually in order of phy index.
 276          */
 277         struct sci_timer phy_timer;
 278
 279         /**
 280          * This field is set when the phy_timer is running and is cleared when
 281          * the phy_timer is stopped.
 282          */
 283         bool phy_startup_timer_pending;
 284
 285         /**
 286          * This field is the index of the next phy start.  It is initialized to 0 and
 287          * increments for each phy index that is started.
 288          */
 289         u32 next_phy_to_start;
 290
 291         /**
 292          * This field controlls the invalid link up notifications to the SCI_USER.  If
 293          * an invalid_link_up notification is reported a bit for the PHY index is set
 294          * so further notifications are not made.  Once the PHY object reports link up
 295          * and is made part of a port then this bit for the PHY index is cleared.
 296          */
 297         u8 invalid_phy_mask;
 298
 299         /*
 300          * This field saves the current interrupt coalescing number of the controller.
 301          */
 302         u16 interrupt_coalesce_number;
 303
 304         /*
 305          * This field saves the current interrupt coalescing timeout value in microseconds.
 306          */
 307         u32 interrupt_coalesce_timeout;
 308
 309         /**
 310          * This field is a pointer to the memory mapped register space for the
 311          * struct smu_registers.
 312          */
 313         struct smu_registers __iomem *smu_registers;
 314
 315         /**
 316          * This field is a pointer to the memory mapped register space for the
 317          * struct scu_registers.
 318          */
 319         struct scu_registers __iomem *scu_registers;
 320
 321 };
 322
 323 struct isci_host {
 324         struct scic_sds_controller sci;
 325         union scic_oem_parameters oem_parameters;
 326
 327         int id; /* unique within a given pci device */
 328         struct list_head timers;
 329         void *core_ctrl_memory;
 330         struct dma_pool *dma_pool;
 331         struct isci_phy phys[SCI_MAX_PHYS];
 332         struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */
 333         struct sas_ha_struct sas_ha;
 334
 335         int can_queue;
 336         spinlock_t queue_lock;
 337         spinlock_t state_lock;
 338
 339         struct pci_dev *pdev;
 340
 341         enum isci_status status;
 342         #define IHOST_START_PENDING 0
 343         #define IHOST_STOP_PENDING 1
 344         unsigned long flags;
 345         wait_queue_head_t eventq;
 346         struct Scsi_Host *shost;
 347         struct tasklet_struct completion_tasklet;
 348         struct list_head requests_to_complete;
 349         struct list_head requests_to_errorback;
 350         spinlock_t scic_lock;
 351
 352         struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES];
 353 };
 354
 355 /**
 356  * enum scic_sds_controller_states - This enumeration depicts all the states
 357  *    for the common controller state machine.
 358  */
 359 enum scic_sds_controller_states {
 360         /**
 361          * Simply the initial state for the base controller state machine.
 362          */
 363         SCI_BASE_CONTROLLER_STATE_INITIAL = 0,
 364
 365         /**
 366          * This state indicates that the controller is reset.  The memory for
 367          * the controller is in it's initial state, but the controller requires
 368          * initialization.
 369          * This state is entered from the INITIAL state.
 370          * This state is entered from the RESETTING state.
 371          */
 372         SCI_BASE_CONTROLLER_STATE_RESET,
 373
 374         /**
 375          * This state is typically an action state that indicates the controller
 376          * is in the process of initialization.  In this state no new IO operations
 377          * are permitted.
 378          * This state is entered from the RESET state.
 379          */
 380         SCI_BASE_CONTROLLER_STATE_INITIALIZING,
 381
 382         /**
 383          * This state indicates that the controller has been successfully
 384          * initialized.  In this state no new IO operations are permitted.
 385          * This state is entered from the INITIALIZING state.
 386          */
 387         SCI_BASE_CONTROLLER_STATE_INITIALIZED,
 388
 389         /**
 390          * This state indicates the the controller is in the process of becoming
 391          * ready (i.e. starting).  In this state no new IO operations are permitted.
 392          * This state is entered from the INITIALIZED state.
 393          */
 394         SCI_BASE_CONTROLLER_STATE_STARTING,
 395
 396         /**
 397          * This state indicates the controller is now ready.  Thus, the user
 398          * is able to perform IO operations on the controller.
 399          * This state is entered from the STARTING state.
 400          */
 401         SCI_BASE_CONTROLLER_STATE_READY,
 402
 403         /**
 404          * This state is typically an action state that indicates the controller
 405          * is in the process of resetting.  Thus, the user is unable to perform
 406          * IO operations on the controller.  A reset is considered destructive in
 407          * most cases.
 408          * This state is entered from the READY state.
 409          * This state is entered from the FAILED state.
 410          * This state is entered from the STOPPED state.
 411          */
 412         SCI_BASE_CONTROLLER_STATE_RESETTING,
 413
 414         /**
 415          * This state indicates that the controller is in the process of stopping.
 416          * In this state no new IO operations are permitted, but existing IO
 417          * operations are allowed to complete.
 418          * This state is entered from the READY state.
 419          */
 420         SCI_BASE_CONTROLLER_STATE_STOPPING,
 421
 422         /**
 423          * This state indicates that the controller has successfully been stopped.
 424          * In this state no new IO operations are permitted.
 425          * This state is entered from the STOPPING state.
 426          */
 427         SCI_BASE_CONTROLLER_STATE_STOPPED,
 428
 429         /**
 430          * This state indicates that the controller could not successfully be
 431          * initialized.  In this state no new IO operations are permitted.
 432          * This state is entered from the INITIALIZING state.
 433          * This state is entered from the STARTING state.
 434          * This state is entered from the STOPPING state.
 435          * This state is entered from the RESETTING state.
 436          */
 437         SCI_BASE_CONTROLLER_STATE_FAILED,
 438
 439         SCI_BASE_CONTROLLER_MAX_STATES
 440
 441 };
 442
 443
 444
 445 /**
 446  * struct isci_pci_info - This class represents the pci function containing the
 447  *    controllers. Depending on PCI SKU, there could be up to 2 controllers in
 448  *    the PCI function.
 449  */
 450 #define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS)
 451
 452 struct isci_pci_info {
 453         struct msix_entry msix_entries[SCI_MAX_MSIX_INT];
 454         struct isci_host *hosts[SCI_MAX_CONTROLLERS];
 455         struct isci_orom *orom;
 456 };
 457
 458 static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev)
 459 {
 460         return pci_get_drvdata(pdev);
 461 }
 462
 463 #define for_each_isci_host(id, ihost, pdev) \
 464         for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \
 465              id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
 466              ihost = to_pci_info(pdev)->hosts[++id])
 467
 468 static inline enum isci_status isci_host_get_state(struct isci_host *isci_host)
 469 {
 470         return isci_host->status;
 471 }
 472
 473 static inline void isci_host_change_state(struct isci_host *isci_host,
 474                                           enum isci_status status)
 475 {
 476         unsigned long flags;
 477
 478         dev_dbg(&isci_host->pdev->dev,
 479                 "%s: isci_host = %p, state = 0x%x",
 480                 __func__,
 481                 isci_host,
 482                 status);
 483         spin_lock_irqsave(&isci_host->state_lock, flags);
 484         isci_host->status = status;
 485         spin_unlock_irqrestore(&isci_host->state_lock, flags);
 486
 487 }
 488
 489 static inline int isci_host_can_queue(struct isci_host *isci_host, int num)
 490 {
 491         int ret = 0;
 492         unsigned long flags;
 493
 494         spin_lock_irqsave(&isci_host->queue_lock, flags);
 495         if ((isci_host->can_queue - num) < 0) {
 496                 dev_dbg(&isci_host->pdev->dev,
 497                         "%s: isci_host->can_queue = %d\n",
 498                         __func__,
 499                         isci_host->can_queue);
 500                 ret = -SAS_QUEUE_FULL;
 501
 502         } else
 503                 isci_host->can_queue -= num;
 504
 505         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 506
 507         return ret;
 508 }
 509
 510 static inline void isci_host_can_dequeue(struct isci_host *isci_host, int num)
 511 {
 512         unsigned long flags;
 513
 514         spin_lock_irqsave(&isci_host->queue_lock, flags);
 515         isci_host->can_queue += num;
 516         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 517 }
 518
 519 static inline void wait_for_start(struct isci_host *ihost)
 520 {
 521         wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags));
 522 }
 523
 524 static inline void wait_for_stop(struct isci_host *ihost)
 525 {
 526         wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags));
 527 }
 528
 529 static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev)
 530 {
 531         wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags));
 532 }
 533
 534 static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
 535 {
 536         wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags));
 537 }
 538
 539 static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
 540 {
 541         return dev->port->ha->lldd_ha;
 542 }
 543
 544 static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic)
 545 {
 546         /* XXX delete after merging scic_sds_contoller and isci_host */
 547         struct isci_host *ihost = container_of(scic, typeof(*ihost), sci);
 548
 549         return ihost;
 550 }
 551
 552 /**
 553  * INCREMENT_QUEUE_GET() -
 554  *
 555  * This macro will increment the specified index to and if the index wraps to 0
 556  * it will toggel the cycle bit.
 557  */
 558 #define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
 559         { \
 560                 if ((index) + 1 == entry_count) {       \
 561                         (index) = 0; \
 562                         (cycle) = (cycle) ^ (bit_toggle); \
 563                 } else { \
 564                         index = index + 1; \
 565                 } \
 566         }
 567
 568 /**
 569  * scic_sds_controller_get_protocol_engine_group() -
 570  *
 571  * This macro returns the protocol engine group for this controller object.
 572  * Presently we only support protocol engine group 0 so just return that
 573  */
 574 #define scic_sds_controller_get_protocol_engine_group(controller) 0
 575
 576 /**
 577  * scic_sds_io_tag_construct() -
 578  *
 579  * This macro constructs an IO tag from the sequence and index values.
 580  */
 581 #define scic_sds_io_tag_construct(sequence, task_index) \
 582         ((sequence) << 12 | (task_index))
 583
 584 /**
 585  * scic_sds_io_tag_get_sequence() -
 586  *
 587  * This macro returns the IO sequence from the IO tag value.
 588  */
 589 #define scic_sds_io_tag_get_sequence(io_tag) \
 590         (((io_tag) & 0xF000) >> 12)
 591
 592 /**
 593  * scic_sds_io_tag_get_index() -
 594  *
 595  * This macro returns the TCi from the io tag value
 596  */
 597 #define scic_sds_io_tag_get_index(io_tag) \
 598         ((io_tag) & 0x0FFF)
 599
 600 /**
 601  * scic_sds_io_sequence_increment() -
 602  *
 603  * This is a helper macro to increment the io sequence count. We may find in
 604  * the future that it will be faster to store the sequence count in such a way
 605  * as we dont perform the shift operation to build io tag values so therefore
 606  * need a way to incrment them correctly
 607  */
 608 #define scic_sds_io_sequence_increment(value) \
 609         ((value) = (((value) + 1) & 0x000F))
 610
 611 /* expander attached sata devices require 3 rnc slots */
 612 static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev)
 613 {
 614         struct domain_device *dev = sci_dev_to_domain(sci_dev);
 615
 616         if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
 617             !sci_dev->is_direct_attached)
 618                 return SCU_STP_REMOTE_NODE_COUNT;
 619         return SCU_SSP_REMOTE_NODE_COUNT;
 620 }
 621
 622 /**
 623  * scic_sds_controller_set_invalid_phy() -
 624  *
 625  * This macro will set the bit in the invalid phy mask for this controller
 626  * object.  This is used to control messages reported for invalid link up
 627  * notifications.
 628  */
 629 #define scic_sds_controller_set_invalid_phy(controller, phy) \
 630         ((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
 631
 632 /**
 633  * scic_sds_controller_clear_invalid_phy() -
 634  *
 635  * This macro will clear the bit in the invalid phy mask for this controller
 636  * object.  This is used to control messages reported for invalid link up
 637  * notifications.
 638  */
 639 #define scic_sds_controller_clear_invalid_phy(controller, phy) \
 640         ((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
 641
 642 static inline struct device *scic_to_dev(struct scic_sds_controller *scic)
 643 {
 644         return &scic_to_ihost(scic)->pdev->dev;
 645 }
 646
 647 static inline struct device *sciphy_to_dev(struct scic_sds_phy *sci_phy)
 648 {
 649         struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
 650
 651         if (!iphy || !iphy->isci_port || !iphy->isci_port->isci_host)
 652                 return NULL;
 653
 654         return &iphy->isci_port->isci_host->pdev->dev;
 655 }
 656
 657 static inline struct device *sciport_to_dev(struct scic_sds_port *sci_port)
 658 {
 659         struct isci_port *iport = sci_port_to_iport(sci_port);
 660
 661         if (!iport || !iport->isci_host)
 662                 return NULL;
 663
 664         return &iport->isci_host->pdev->dev;
 665 }
 666
 667 static inline struct device *scirdev_to_dev(struct scic_sds_remote_device *sci_dev)
 668 {
 669         struct isci_remote_device *idev =
 670                         container_of(sci_dev, typeof(*idev), sci);
 671
 672         if (!idev || !idev->isci_port || !idev->isci_port->isci_host)
 673                 return NULL;
 674
 675         return &idev->isci_port->isci_host->pdev->dev;
 676 }
 677
 678 enum {
 679         ISCI_SI_REVA0,
 680         ISCI_SI_REVA2,
 681         ISCI_SI_REVB0,
 682 };
 683
 684 extern int isci_si_rev;
 685
 686 static inline bool is_a0(void)
 687 {
 688         return isci_si_rev == ISCI_SI_REVA0;
 689 }
 690
 691 static inline bool is_a2(void)
 692 {
 693         return isci_si_rev == ISCI_SI_REVA2;
 694 }
 695
 696 static inline bool is_b0(void)
 697 {
 698         return isci_si_rev > ISCI_SI_REVA2;
 699 }
 700
 701 void scic_sds_controller_post_request(struct scic_sds_controller *scic,
 702                                       u32 request);
 703 void scic_sds_controller_release_frame(struct scic_sds_controller *scic,
 704                                        u32 frame_index);
 705 void scic_sds_controller_copy_sata_response(void *response_buffer,
 706                                             void *frame_header,
 707                                             void *frame_buffer);
 708 enum sci_status scic_sds_controller_allocate_remote_node_context(struct scic_sds_controller *scic,
 709                                                                  struct scic_sds_remote_device *sci_dev,
 710                                                                  u16 *node_id);
 711 void scic_sds_controller_free_remote_node_context(
 712         struct scic_sds_controller *scic,
 713         struct scic_sds_remote_device *sci_dev,
 714         u16 node_id);
 715 union scu_remote_node_context *scic_sds_controller_get_remote_node_context_buffer(
 716         struct scic_sds_controller *scic,
 717         u16 node_id);
 718
 719 struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
 720                                              u16 io_tag);
 721
 722 struct scu_task_context *scic_sds_controller_get_task_context_buffer(
 723         struct scic_sds_controller *scic,
 724         u16 io_tag);
 725
 726 void scic_sds_controller_power_control_queue_insert(
 727         struct scic_sds_controller *scic,
 728         struct scic_sds_phy *sci_phy);
 729
 730 void scic_sds_controller_power_control_queue_remove(
 731         struct scic_sds_controller *scic,
 732         struct scic_sds_phy *sci_phy);
 733
 734 void scic_sds_controller_link_up(
 735         struct scic_sds_controller *scic,
 736         struct scic_sds_port *sci_port,
 737         struct scic_sds_phy *sci_phy);
 738
 739 void scic_sds_controller_link_down(
 740         struct scic_sds_controller *scic,
 741         struct scic_sds_port *sci_port,
 742         struct scic_sds_phy *sci_phy);
 743
 744 void scic_sds_controller_remote_device_stopped(
 745         struct scic_sds_controller *scic,
 746         struct scic_sds_remote_device *sci_dev);
 747
 748 void scic_sds_controller_copy_task_context(
 749         struct scic_sds_controller *scic,
 750         struct scic_sds_request *this_request);
 751
 752 void scic_sds_controller_register_setup(struct scic_sds_controller *scic);
 753
 754 enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
 755 int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
 756 void isci_host_scan_start(struct Scsi_Host *);
 757
 758 int isci_host_init(struct isci_host *);
 759
 760 void isci_host_init_controller_names(
 761         struct isci_host *isci_host,
 762         unsigned int controller_idx);
 763
 764 void isci_host_deinit(
 765         struct isci_host *);
 766
 767 void isci_host_port_link_up(
 768         struct isci_host *,
 769         struct scic_sds_port *,
 770         struct scic_sds_phy *);
 771 int isci_host_dev_found(struct domain_device *);
 772
 773 void isci_host_remote_device_start_complete(
 774         struct isci_host *,
 775         struct isci_remote_device *,
 776         enum sci_status);
 777
 778 void scic_controller_disable_interrupts(
 779         struct scic_sds_controller *scic);
 780
 781 enum sci_status scic_controller_start_io(
 782         struct scic_sds_controller *scic,
 783         struct scic_sds_remote_device *remote_device,
 784         struct scic_sds_request *io_request,
 785         u16 io_tag);
 786
 787 enum sci_task_status scic_controller_start_task(
 788         struct scic_sds_controller *scic,
 789         struct scic_sds_remote_device *remote_device,
 790         struct scic_sds_request *task_request,
 791         u16 io_tag);
 792
 793 enum sci_status scic_controller_terminate_request(
 794         struct scic_sds_controller *scic,
 795         struct scic_sds_remote_device *remote_device,
 796         struct scic_sds_request *request);
 797
 798 enum sci_status scic_controller_complete_io(
 799         struct scic_sds_controller *scic,
 800         struct scic_sds_remote_device *remote_device,
 801         struct scic_sds_request *io_request);
 802
 803 u16 scic_controller_allocate_io_tag(
 804         struct scic_sds_controller *scic);
 805
 806 enum sci_status scic_controller_free_io_tag(
 807         struct scic_sds_controller *scic,
 808         u16 io_tag);
 809
 810 void scic_sds_port_configuration_agent_construct(
 811         struct scic_sds_port_configuration_agent *port_agent);
 812
 813 enum sci_status scic_sds_port_configuration_agent_initialize(
 814         struct scic_sds_controller *controller,
 815         struct scic_sds_port_configuration_agent *port_agent);
 816 #endif