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