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