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 "isci.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 sm;
 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         void *core_ctrl_memory;
 329         struct dma_pool *dma_pool;
 330         struct isci_phy phys[SCI_MAX_PHYS];
 331         struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */
 332         struct sas_ha_struct sas_ha;
 333
 334         int can_queue;
 335         spinlock_t queue_lock;
 336         spinlock_t state_lock;
 337
 338         struct pci_dev *pdev;
 339
 340         enum isci_status status;
 341         #define IHOST_START_PENDING 0
 342         #define IHOST_STOP_PENDING 1
 343         unsigned long flags;
 344         wait_queue_head_t eventq;
 345         struct Scsi_Host *shost;
 346         struct tasklet_struct completion_tasklet;
 347         struct list_head requests_to_complete;
 348         struct list_head requests_to_errorback;
 349         spinlock_t scic_lock;
 350
 351         struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES];
 352 };
 353
 354 /**
 355  * enum scic_sds_controller_states - This enumeration depicts all the states
 356  *    for the common controller state machine.
 357  */
 358 enum scic_sds_controller_states {
 359         /**
 360          * Simply the initial state for the base controller state machine.
 361          */
 362         SCIC_INITIAL = 0,
 363
 364         /**
 365          * This state indicates that the controller is reset.  The memory for
 366          * the controller is in it's initial state, but the controller requires
 367          * initialization.
 368          * This state is entered from the INITIAL state.
 369          * This state is entered from the RESETTING state.
 370          */
 371         SCIC_RESET,
 372
 373         /**
 374          * This state is typically an action state that indicates the controller
 375          * is in the process of initialization.  In this state no new IO operations
 376          * are permitted.
 377          * This state is entered from the RESET state.
 378          */
 379         SCIC_INITIALIZING,
 380
 381         /**
 382          * This state indicates that the controller has been successfully
 383          * initialized.  In this state no new IO operations are permitted.
 384          * This state is entered from the INITIALIZING state.
 385          */
 386         SCIC_INITIALIZED,
 387
 388         /**
 389          * This state indicates the the controller is in the process of becoming
 390          * ready (i.e. starting).  In this state no new IO operations are permitted.
 391          * This state is entered from the INITIALIZED state.
 392          */
 393         SCIC_STARTING,
 394
 395         /**
 396          * This state indicates the controller is now ready.  Thus, the user
 397          * is able to perform IO operations on the controller.
 398          * This state is entered from the STARTING state.
 399          */
 400         SCIC_READY,
 401
 402         /**
 403          * This state is typically an action state that indicates the controller
 404          * is in the process of resetting.  Thus, the user is unable to perform
 405          * IO operations on the controller.  A reset is considered destructive in
 406          * most cases.
 407          * This state is entered from the READY state.
 408          * This state is entered from the FAILED state.
 409          * This state is entered from the STOPPED state.
 410          */
 411         SCIC_RESETTING,
 412
 413         /**
 414          * This state indicates that the controller is in the process of stopping.
 415          * In this state no new IO operations are permitted, but existing IO
 416          * operations are allowed to complete.
 417          * This state is entered from the READY state.
 418          */
 419         SCIC_STOPPING,
 420
 421         /**
 422          * This state indicates that the controller has successfully been stopped.
 423          * In this state no new IO operations are permitted.
 424          * This state is entered from the STOPPING state.
 425          */
 426         SCIC_STOPPED,
 427
 428         /**
 429          * This state indicates that the controller could not successfully be
 430          * initialized.  In this state no new IO operations are permitted.
 431          * This state is entered from the INITIALIZING state.
 432          * This state is entered from the STARTING state.
 433          * This state is entered from the STOPPING state.
 434          * This state is entered from the RESETTING state.
 435          */
 436         SCIC_FAILED,
 437 };
 438
 439
 440
 441 /**
 442  * struct isci_pci_info - This class represents the pci function containing the
 443  *    controllers. Depending on PCI SKU, there could be up to 2 controllers in
 444  *    the PCI function.
 445  */
 446 #define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS)
 447
 448 struct isci_pci_info {
 449         struct msix_entry msix_entries[SCI_MAX_MSIX_INT];
 450         struct isci_host *hosts[SCI_MAX_CONTROLLERS];
 451         struct isci_orom *orom;
 452 };
 453
 454 static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev)
 455 {
 456         return pci_get_drvdata(pdev);
 457 }
 458
 459 #define for_each_isci_host(id, ihost, pdev) \
 460         for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \
 461              id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
 462              ihost = to_pci_info(pdev)->hosts[++id])
 463
 464 static inline enum isci_status isci_host_get_state(struct isci_host *isci_host)
 465 {
 466         return isci_host->status;
 467 }
 468
 469 static inline void isci_host_change_state(struct isci_host *isci_host,
 470                                           enum isci_status status)
 471 {
 472         unsigned long flags;
 473
 474         dev_dbg(&isci_host->pdev->dev,
 475                 "%s: isci_host = %p, state = 0x%x",
 476                 __func__,
 477                 isci_host,
 478                 status);
 479         spin_lock_irqsave(&isci_host->state_lock, flags);
 480         isci_host->status = status;
 481         spin_unlock_irqrestore(&isci_host->state_lock, flags);
 482
 483 }
 484
 485 static inline int isci_host_can_queue(struct isci_host *isci_host, int num)
 486 {
 487         int ret = 0;
 488         unsigned long flags;
 489
 490         spin_lock_irqsave(&isci_host->queue_lock, flags);
 491         if ((isci_host->can_queue - num) < 0) {
 492                 dev_dbg(&isci_host->pdev->dev,
 493                         "%s: isci_host->can_queue = %d\n",
 494                         __func__,
 495                         isci_host->can_queue);
 496                 ret = -SAS_QUEUE_FULL;
 497
 498         } else
 499                 isci_host->can_queue -= num;
 500
 501         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 502
 503         return ret;
 504 }
 505
 506 static inline void isci_host_can_dequeue(struct isci_host *isci_host, int num)
 507 {
 508         unsigned long flags;
 509
 510         spin_lock_irqsave(&isci_host->queue_lock, flags);
 511         isci_host->can_queue += num;
 512         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 513 }
 514
 515 static inline void wait_for_start(struct isci_host *ihost)
 516 {
 517         wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags));
 518 }
 519
 520 static inline void wait_for_stop(struct isci_host *ihost)
 521 {
 522         wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags));
 523 }
 524
 525 static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev)
 526 {
 527         wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags));
 528 }
 529
 530 static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
 531 {
 532         wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags));
 533 }
 534
 535 static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
 536 {
 537         return dev->port->ha->lldd_ha;
 538 }
 539
 540 static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic)
 541 {
 542         /* XXX delete after merging scic_sds_contoller and isci_host */
 543         struct isci_host *ihost = container_of(scic, typeof(*ihost), sci);
 544
 545         return ihost;
 546 }
 547
 548 /**
 549  * INCREMENT_QUEUE_GET() -
 550  *
 551  * This macro will increment the specified index to and if the index wraps to 0
 552  * it will toggel the cycle bit.
 553  */
 554 #define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
 555         { \
 556                 if ((index) + 1 == entry_count) {       \
 557                         (index) = 0; \
 558                         (cycle) = (cycle) ^ (bit_toggle); \
 559                 } else { \
 560                         index = index + 1; \
 561                 } \
 562         }
 563
 564 /**
 565  * scic_sds_controller_get_protocol_engine_group() -
 566  *
 567  * This macro returns the protocol engine group for this controller object.
 568  * Presently we only support protocol engine group 0 so just return that
 569  */
 570 #define scic_sds_controller_get_protocol_engine_group(controller) 0
 571
 572 /**
 573  * scic_sds_io_tag_construct() -
 574  *
 575  * This macro constructs an IO tag from the sequence and index values.
 576  */
 577 #define scic_sds_io_tag_construct(sequence, task_index) \
 578         ((sequence) << 12 | (task_index))
 579
 580 /**
 581  * scic_sds_io_tag_get_sequence() -
 582  *
 583  * This macro returns the IO sequence from the IO tag value.
 584  */
 585 #define scic_sds_io_tag_get_sequence(io_tag) \
 586         (((io_tag) & 0xF000) >> 12)
 587
 588 /**
 589  * scic_sds_io_tag_get_index() -
 590  *
 591  * This macro returns the TCi from the io tag value
 592  */
 593 #define scic_sds_io_tag_get_index(io_tag) \
 594         ((io_tag) & 0x0FFF)
 595
 596 /**
 597  * scic_sds_io_sequence_increment() -
 598  *
 599  * This is a helper macro to increment the io sequence count. We may find in
 600  * the future that it will be faster to store the sequence count in such a way
 601  * as we dont perform the shift operation to build io tag values so therefore
 602  * need a way to incrment them correctly
 603  */
 604 #define scic_sds_io_sequence_increment(value) \
 605         ((value) = (((value) + 1) & 0x000F))
 606
 607 /* expander attached sata devices require 3 rnc slots */
 608 static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev)
 609 {
 610         struct domain_device *dev = sci_dev_to_domain(sci_dev);
 611
 612         if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
 613             !sci_dev->is_direct_attached)
 614                 return SCU_STP_REMOTE_NODE_COUNT;
 615         return SCU_SSP_REMOTE_NODE_COUNT;
 616 }
 617
 618 /**
 619  * scic_sds_controller_set_invalid_phy() -
 620  *
 621  * This macro will set the bit in the invalid phy mask for this controller
 622  * object.  This is used to control messages reported for invalid link up
 623  * notifications.
 624  */
 625 #define scic_sds_controller_set_invalid_phy(controller, phy) \
 626         ((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
 627
 628 /**
 629  * scic_sds_controller_clear_invalid_phy() -
 630  *
 631  * This macro will clear the bit in the invalid phy mask for this controller
 632  * object.  This is used to control messages reported for invalid link up
 633  * notifications.
 634  */
 635 #define scic_sds_controller_clear_invalid_phy(controller, phy) \
 636         ((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
 637
 638 static inline struct device *scic_to_dev(struct scic_sds_controller *scic)
 639 {
 640         return &scic_to_ihost(scic)->pdev->dev;
 641 }
 642
 643 static inline struct device *sciphy_to_dev(struct scic_sds_phy *sci_phy)
 644 {
 645         struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
 646
 647         if (!iphy || !iphy->isci_port || !iphy->isci_port->isci_host)
 648                 return NULL;
 649
 650         return &iphy->isci_port->isci_host->pdev->dev;
 651 }
 652
 653 static inline struct device *sciport_to_dev(struct scic_sds_port *sci_port)
 654 {
 655         struct isci_port *iport = sci_port_to_iport(sci_port);
 656
 657         if (!iport || !iport->isci_host)
 658                 return NULL;
 659
 660         return &iport->isci_host->pdev->dev;
 661 }
 662
 663 static inline struct device *scirdev_to_dev(struct scic_sds_remote_device *sci_dev)
 664 {
 665         struct isci_remote_device *idev =
 666                         container_of(sci_dev, typeof(*idev), sci);
 667
 668         if (!idev || !idev->isci_port || !idev->isci_port->isci_host)
 669                 return NULL;
 670
 671         return &idev->isci_port->isci_host->pdev->dev;
 672 }
 673
 674 enum {
 675         ISCI_SI_REVA0,
 676         ISCI_SI_REVA2,
 677         ISCI_SI_REVB0,
 678 };
 679
 680 extern int isci_si_rev;
 681
 682 static inline bool is_a0(void)
 683 {
 684         return isci_si_rev == ISCI_SI_REVA0;
 685 }
 686
 687 static inline bool is_a2(void)
 688 {
 689         return isci_si_rev == ISCI_SI_REVA2;
 690 }
 691
 692 static inline bool is_b0(void)
 693 {
 694         return isci_si_rev > ISCI_SI_REVA2;
 695 }
 696
 697 void scic_sds_controller_post_request(struct scic_sds_controller *scic,
 698                                       u32 request);
 699 void scic_sds_controller_release_frame(struct scic_sds_controller *scic,
 700                                        u32 frame_index);
 701 void scic_sds_controller_copy_sata_response(void *response_buffer,
 702                                             void *frame_header,
 703                                             void *frame_buffer);
 704 enum sci_status scic_sds_controller_allocate_remote_node_context(struct scic_sds_controller *scic,
 705                                                                  struct scic_sds_remote_device *sci_dev,
 706                                                                  u16 *node_id);
 707 void scic_sds_controller_free_remote_node_context(
 708         struct scic_sds_controller *scic,
 709         struct scic_sds_remote_device *sci_dev,
 710         u16 node_id);
 711 union scu_remote_node_context *scic_sds_controller_get_remote_node_context_buffer(
 712         struct scic_sds_controller *scic,
 713         u16 node_id);
 714
 715 struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
 716                                              u16 io_tag);
 717
 718 struct scu_task_context *scic_sds_controller_get_task_context_buffer(
 719         struct scic_sds_controller *scic,
 720         u16 io_tag);
 721
 722 void scic_sds_controller_power_control_queue_insert(
 723         struct scic_sds_controller *scic,
 724         struct scic_sds_phy *sci_phy);
 725
 726 void scic_sds_controller_power_control_queue_remove(
 727         struct scic_sds_controller *scic,
 728         struct scic_sds_phy *sci_phy);
 729
 730 void scic_sds_controller_link_up(
 731         struct scic_sds_controller *scic,
 732         struct scic_sds_port *sci_port,
 733         struct scic_sds_phy *sci_phy);
 734
 735 void scic_sds_controller_link_down(
 736         struct scic_sds_controller *scic,
 737         struct scic_sds_port *sci_port,
 738         struct scic_sds_phy *sci_phy);
 739
 740 void scic_sds_controller_remote_device_stopped(
 741         struct scic_sds_controller *scic,
 742         struct scic_sds_remote_device *sci_dev);
 743
 744 void scic_sds_controller_copy_task_context(
 745         struct scic_sds_controller *scic,
 746         struct scic_sds_request *this_request);
 747
 748 void scic_sds_controller_register_setup(struct scic_sds_controller *scic);
 749
 750 enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
 751 int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
 752 void isci_host_scan_start(struct Scsi_Host *);
 753
 754 int isci_host_init(struct isci_host *);
 755
 756 void isci_host_init_controller_names(
 757         struct isci_host *isci_host,
 758         unsigned int controller_idx);
 759
 760 void isci_host_deinit(
 761         struct isci_host *);
 762
 763 void isci_host_port_link_up(
 764         struct isci_host *,
 765         struct scic_sds_port *,
 766         struct scic_sds_phy *);
 767 int isci_host_dev_found(struct domain_device *);
 768
 769 void isci_host_remote_device_start_complete(
 770         struct isci_host *,
 771         struct isci_remote_device *,
 772         enum sci_status);
 773
 774 void scic_controller_disable_interrupts(
 775         struct scic_sds_controller *scic);
 776
 777 enum sci_status scic_controller_start_io(
 778         struct scic_sds_controller *scic,
 779         struct scic_sds_remote_device *remote_device,
 780         struct scic_sds_request *io_request,
 781         u16 io_tag);
 782
 783 enum sci_task_status scic_controller_start_task(
 784         struct scic_sds_controller *scic,
 785         struct scic_sds_remote_device *remote_device,
 786         struct scic_sds_request *task_request,
 787         u16 io_tag);
 788
 789 enum sci_status scic_controller_terminate_request(
 790         struct scic_sds_controller *scic,
 791         struct scic_sds_remote_device *remote_device,
 792         struct scic_sds_request *request);
 793
 794 enum sci_status scic_controller_complete_io(
 795         struct scic_sds_controller *scic,
 796         struct scic_sds_remote_device *remote_device,
 797         struct scic_sds_request *io_request);
 798
 799 u16 scic_controller_allocate_io_tag(
 800         struct scic_sds_controller *scic);
 801
 802 enum sci_status scic_controller_free_io_tag(
 803         struct scic_sds_controller *scic,
 804         u16 io_tag);
 805
 806 void scic_sds_port_configuration_agent_construct(
 807         struct scic_sds_port_configuration_agent *port_agent);
 808
 809 enum sci_status scic_sds_port_configuration_agent_initialize(
 810         struct scic_sds_controller *controller,
 811         struct scic_sds_port_configuration_agent *port_agent);
 812 #endif