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 devices supported by the hardware and
 244          * the number of devices requested by the software.
 245          */
 246         u32 remote_node_entries;
 247
 248         /**
 249          * This field is the minimum number of IO requests supported by the hardware
 250          * and the number of IO requests requested by the software.
 251          */
 252         u32 task_context_entries;
 253
 254         /**
 255          * This object contains all of the unsolicited frame specific
 256          * data utilized by the core controller.
 257          */
 258         struct scic_sds_unsolicited_frame_control uf_control;
 259
 260         /* Phy Startup Data */
 261         /**
 262          * Timer for controller phy request startup. On controller start the
 263          * controller will start each PHY individually in order of phy index.
 264          */
 265         struct sci_timer phy_timer;
 266
 267         /**
 268          * This field is set when the phy_timer is running and is cleared when
 269          * the phy_timer is stopped.
 270          */
 271         bool phy_startup_timer_pending;
 272
 273         /**
 274          * This field is the index of the next phy start.  It is initialized to 0 and
 275          * increments for each phy index that is started.
 276          */
 277         u32 next_phy_to_start;
 278
 279         /**
 280          * This field controlls the invalid link up notifications to the SCI_USER.  If
 281          * an invalid_link_up notification is reported a bit for the PHY index is set
 282          * so further notifications are not made.  Once the PHY object reports link up
 283          * and is made part of a port then this bit for the PHY index is cleared.
 284          */
 285         u8 invalid_phy_mask;
 286
 287         /*
 288          * This field saves the current interrupt coalescing number of the controller.
 289          */
 290         u16 interrupt_coalesce_number;
 291
 292         /*
 293          * This field saves the current interrupt coalescing timeout value in microseconds.
 294          */
 295         u32 interrupt_coalesce_timeout;
 296
 297         /**
 298          * This field is a pointer to the memory mapped register space for the
 299          * struct smu_registers.
 300          */
 301         struct smu_registers __iomem *smu_registers;
 302
 303         /**
 304          * This field is a pointer to the memory mapped register space for the
 305          * struct scu_registers.
 306          */
 307         struct scu_registers __iomem *scu_registers;
 308
 309 };
 310
 311 struct isci_host {
 312         struct scic_sds_controller sci;
 313         union scic_oem_parameters oem_parameters;
 314
 315         int id; /* unique within a given pci device */
 316         struct dma_pool *dma_pool;
 317         struct isci_phy phys[SCI_MAX_PHYS];
 318         struct isci_port ports[SCI_MAX_PORTS + 1]; /* includes dummy port */
 319         struct sas_ha_struct sas_ha;
 320
 321         int can_queue;
 322         spinlock_t queue_lock;
 323         spinlock_t state_lock;
 324
 325         struct pci_dev *pdev;
 326
 327         enum isci_status status;
 328         #define IHOST_START_PENDING 0
 329         #define IHOST_STOP_PENDING 1
 330         unsigned long flags;
 331         wait_queue_head_t eventq;
 332         struct Scsi_Host *shost;
 333         struct tasklet_struct completion_tasklet;
 334         struct list_head requests_to_complete;
 335         struct list_head requests_to_errorback;
 336         spinlock_t scic_lock;
 337
 338         struct isci_remote_device devices[SCI_MAX_REMOTE_DEVICES];
 339 };
 340
 341 /**
 342  * enum scic_sds_controller_states - This enumeration depicts all the states
 343  *    for the common controller state machine.
 344  */
 345 enum scic_sds_controller_states {
 346         /**
 347          * Simply the initial state for the base controller state machine.
 348          */
 349         SCIC_INITIAL = 0,
 350
 351         /**
 352          * This state indicates that the controller is reset.  The memory for
 353          * the controller is in it's initial state, but the controller requires
 354          * initialization.
 355          * This state is entered from the INITIAL state.
 356          * This state is entered from the RESETTING state.
 357          */
 358         SCIC_RESET,
 359
 360         /**
 361          * This state is typically an action state that indicates the controller
 362          * is in the process of initialization.  In this state no new IO operations
 363          * are permitted.
 364          * This state is entered from the RESET state.
 365          */
 366         SCIC_INITIALIZING,
 367
 368         /**
 369          * This state indicates that the controller has been successfully
 370          * initialized.  In this state no new IO operations are permitted.
 371          * This state is entered from the INITIALIZING state.
 372          */
 373         SCIC_INITIALIZED,
 374
 375         /**
 376          * This state indicates the the controller is in the process of becoming
 377          * ready (i.e. starting).  In this state no new IO operations are permitted.
 378          * This state is entered from the INITIALIZED state.
 379          */
 380         SCIC_STARTING,
 381
 382         /**
 383          * This state indicates the controller is now ready.  Thus, the user
 384          * is able to perform IO operations on the controller.
 385          * This state is entered from the STARTING state.
 386          */
 387         SCIC_READY,
 388
 389         /**
 390          * This state is typically an action state that indicates the controller
 391          * is in the process of resetting.  Thus, the user is unable to perform
 392          * IO operations on the controller.  A reset is considered destructive in
 393          * most cases.
 394          * This state is entered from the READY state.
 395          * This state is entered from the FAILED state.
 396          * This state is entered from the STOPPED state.
 397          */
 398         SCIC_RESETTING,
 399
 400         /**
 401          * This state indicates that the controller is in the process of stopping.
 402          * In this state no new IO operations are permitted, but existing IO
 403          * operations are allowed to complete.
 404          * This state is entered from the READY state.
 405          */
 406         SCIC_STOPPING,
 407
 408         /**
 409          * This state indicates that the controller has successfully been stopped.
 410          * In this state no new IO operations are permitted.
 411          * This state is entered from the STOPPING state.
 412          */
 413         SCIC_STOPPED,
 414
 415         /**
 416          * This state indicates that the controller could not successfully be
 417          * initialized.  In this state no new IO operations are permitted.
 418          * This state is entered from the INITIALIZING state.
 419          * This state is entered from the STARTING state.
 420          * This state is entered from the STOPPING state.
 421          * This state is entered from the RESETTING state.
 422          */
 423         SCIC_FAILED,
 424 };
 425
 426
 427
 428 /**
 429  * struct isci_pci_info - This class represents the pci function containing the
 430  *    controllers. Depending on PCI SKU, there could be up to 2 controllers in
 431  *    the PCI function.
 432  */
 433 #define SCI_MAX_MSIX_INT (SCI_NUM_MSI_X_INT*SCI_MAX_CONTROLLERS)
 434
 435 struct isci_pci_info {
 436         struct msix_entry msix_entries[SCI_MAX_MSIX_INT];
 437         struct isci_host *hosts[SCI_MAX_CONTROLLERS];
 438         struct isci_orom *orom;
 439 };
 440
 441 static inline struct isci_pci_info *to_pci_info(struct pci_dev *pdev)
 442 {
 443         return pci_get_drvdata(pdev);
 444 }
 445
 446 #define for_each_isci_host(id, ihost, pdev) \
 447         for (id = 0, ihost = to_pci_info(pdev)->hosts[id]; \
 448              id < ARRAY_SIZE(to_pci_info(pdev)->hosts) && ihost; \
 449              ihost = to_pci_info(pdev)->hosts[++id])
 450
 451 static inline enum isci_status isci_host_get_state(struct isci_host *isci_host)
 452 {
 453         return isci_host->status;
 454 }
 455
 456 static inline void isci_host_change_state(struct isci_host *isci_host,
 457                                           enum isci_status status)
 458 {
 459         unsigned long flags;
 460
 461         dev_dbg(&isci_host->pdev->dev,
 462                 "%s: isci_host = %p, state = 0x%x",
 463                 __func__,
 464                 isci_host,
 465                 status);
 466         spin_lock_irqsave(&isci_host->state_lock, flags);
 467         isci_host->status = status;
 468         spin_unlock_irqrestore(&isci_host->state_lock, flags);
 469
 470 }
 471
 472 static inline int isci_host_can_queue(struct isci_host *isci_host, int num)
 473 {
 474         int ret = 0;
 475         unsigned long flags;
 476
 477         spin_lock_irqsave(&isci_host->queue_lock, flags);
 478         if ((isci_host->can_queue - num) < 0) {
 479                 dev_dbg(&isci_host->pdev->dev,
 480                         "%s: isci_host->can_queue = %d\n",
 481                         __func__,
 482                         isci_host->can_queue);
 483                 ret = -SAS_QUEUE_FULL;
 484
 485         } else
 486                 isci_host->can_queue -= num;
 487
 488         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 489
 490         return ret;
 491 }
 492
 493 static inline void isci_host_can_dequeue(struct isci_host *isci_host, int num)
 494 {
 495         unsigned long flags;
 496
 497         spin_lock_irqsave(&isci_host->queue_lock, flags);
 498         isci_host->can_queue += num;
 499         spin_unlock_irqrestore(&isci_host->queue_lock, flags);
 500 }
 501
 502 static inline void wait_for_start(struct isci_host *ihost)
 503 {
 504         wait_event(ihost->eventq, !test_bit(IHOST_START_PENDING, &ihost->flags));
 505 }
 506
 507 static inline void wait_for_stop(struct isci_host *ihost)
 508 {
 509         wait_event(ihost->eventq, !test_bit(IHOST_STOP_PENDING, &ihost->flags));
 510 }
 511
 512 static inline void wait_for_device_start(struct isci_host *ihost, struct isci_remote_device *idev)
 513 {
 514         wait_event(ihost->eventq, !test_bit(IDEV_START_PENDING, &idev->flags));
 515 }
 516
 517 static inline void wait_for_device_stop(struct isci_host *ihost, struct isci_remote_device *idev)
 518 {
 519         wait_event(ihost->eventq, !test_bit(IDEV_STOP_PENDING, &idev->flags));
 520 }
 521
 522 static inline struct isci_host *dev_to_ihost(struct domain_device *dev)
 523 {
 524         return dev->port->ha->lldd_ha;
 525 }
 526
 527 static inline struct isci_host *scic_to_ihost(struct scic_sds_controller *scic)
 528 {
 529         /* XXX delete after merging scic_sds_contoller and isci_host */
 530         struct isci_host *ihost = container_of(scic, typeof(*ihost), sci);
 531
 532         return ihost;
 533 }
 534
 535 /**
 536  * INCREMENT_QUEUE_GET() -
 537  *
 538  * This macro will increment the specified index to and if the index wraps to 0
 539  * it will toggel the cycle bit.
 540  */
 541 #define INCREMENT_QUEUE_GET(index, cycle, entry_count, bit_toggle) \
 542         { \
 543                 if ((index) + 1 == entry_count) {       \
 544                         (index) = 0; \
 545                         (cycle) = (cycle) ^ (bit_toggle); \
 546                 } else { \
 547                         index = index + 1; \
 548                 } \
 549         }
 550
 551 /**
 552  * scic_sds_controller_get_protocol_engine_group() -
 553  *
 554  * This macro returns the protocol engine group for this controller object.
 555  * Presently we only support protocol engine group 0 so just return that
 556  */
 557 #define scic_sds_controller_get_protocol_engine_group(controller) 0
 558
 559 /**
 560  * scic_sds_io_tag_construct() -
 561  *
 562  * This macro constructs an IO tag from the sequence and index values.
 563  */
 564 #define scic_sds_io_tag_construct(sequence, task_index) \
 565         ((sequence) << 12 | (task_index))
 566
 567 /**
 568  * scic_sds_io_tag_get_sequence() -
 569  *
 570  * This macro returns the IO sequence from the IO tag value.
 571  */
 572 #define scic_sds_io_tag_get_sequence(io_tag) \
 573         (((io_tag) & 0xF000) >> 12)
 574
 575 /**
 576  * scic_sds_io_tag_get_index() -
 577  *
 578  * This macro returns the TCi from the io tag value
 579  */
 580 #define scic_sds_io_tag_get_index(io_tag) \
 581         ((io_tag) & 0x0FFF)
 582
 583 /**
 584  * scic_sds_io_sequence_increment() -
 585  *
 586  * This is a helper macro to increment the io sequence count. We may find in
 587  * the future that it will be faster to store the sequence count in such a way
 588  * as we dont perform the shift operation to build io tag values so therefore
 589  * need a way to incrment them correctly
 590  */
 591 #define scic_sds_io_sequence_increment(value) \
 592         ((value) = (((value) + 1) & 0x000F))
 593
 594 /* expander attached sata devices require 3 rnc slots */
 595 static inline int scic_sds_remote_device_node_count(struct scic_sds_remote_device *sci_dev)
 596 {
 597         struct domain_device *dev = sci_dev_to_domain(sci_dev);
 598
 599         if ((dev->dev_type == SATA_DEV || (dev->tproto & SAS_PROTOCOL_STP)) &&
 600             !sci_dev->is_direct_attached)
 601                 return SCU_STP_REMOTE_NODE_COUNT;
 602         return SCU_SSP_REMOTE_NODE_COUNT;
 603 }
 604
 605 /**
 606  * scic_sds_controller_set_invalid_phy() -
 607  *
 608  * This macro will set the bit in the invalid phy mask for this controller
 609  * object.  This is used to control messages reported for invalid link up
 610  * notifications.
 611  */
 612 #define scic_sds_controller_set_invalid_phy(controller, phy) \
 613         ((controller)->invalid_phy_mask |= (1 << (phy)->phy_index))
 614
 615 /**
 616  * scic_sds_controller_clear_invalid_phy() -
 617  *
 618  * This macro will clear the bit in the invalid phy mask for this controller
 619  * object.  This is used to control messages reported for invalid link up
 620  * notifications.
 621  */
 622 #define scic_sds_controller_clear_invalid_phy(controller, phy) \
 623         ((controller)->invalid_phy_mask &= ~(1 << (phy)->phy_index))
 624
 625 static inline struct device *scic_to_dev(struct scic_sds_controller *scic)
 626 {
 627         return &scic_to_ihost(scic)->pdev->dev;
 628 }
 629
 630 static inline struct device *sciphy_to_dev(struct scic_sds_phy *sci_phy)
 631 {
 632         struct isci_phy *iphy = sci_phy_to_iphy(sci_phy);
 633
 634         if (!iphy || !iphy->isci_port || !iphy->isci_port->isci_host)
 635                 return NULL;
 636
 637         return &iphy->isci_port->isci_host->pdev->dev;
 638 }
 639
 640 static inline struct device *sciport_to_dev(struct scic_sds_port *sci_port)
 641 {
 642         struct isci_port *iport = sci_port_to_iport(sci_port);
 643
 644         if (!iport || !iport->isci_host)
 645                 return NULL;
 646
 647         return &iport->isci_host->pdev->dev;
 648 }
 649
 650 static inline struct device *scirdev_to_dev(struct scic_sds_remote_device *sci_dev)
 651 {
 652         struct isci_remote_device *idev =
 653                         container_of(sci_dev, typeof(*idev), sci);
 654
 655         if (!idev || !idev->isci_port || !idev->isci_port->isci_host)
 656                 return NULL;
 657
 658         return &idev->isci_port->isci_host->pdev->dev;
 659 }
 660
 661 enum {
 662         ISCI_SI_REVA0,
 663         ISCI_SI_REVA2,
 664         ISCI_SI_REVB0,
 665         ISCI_SI_REVC0
 666 };
 667
 668 extern int isci_si_rev;
 669
 670 static inline bool is_a0(void)
 671 {
 672         return isci_si_rev == ISCI_SI_REVA0;
 673 }
 674
 675 static inline bool is_a2(void)
 676 {
 677         return isci_si_rev == ISCI_SI_REVA2;
 678 }
 679
 680 static inline bool is_b0(void)
 681 {
 682         return isci_si_rev == ISCI_SI_REVB0;
 683 }
 684
 685 static inline bool is_c0(void)
 686 {
 687         return isci_si_rev > ISCI_SI_REVB0;
 688 }
 689
 690 void scic_sds_controller_post_request(struct scic_sds_controller *scic,
 691                                       u32 request);
 692 void scic_sds_controller_release_frame(struct scic_sds_controller *scic,
 693                                        u32 frame_index);
 694 void scic_sds_controller_copy_sata_response(void *response_buffer,
 695                                             void *frame_header,
 696                                             void *frame_buffer);
 697 enum sci_status scic_sds_controller_allocate_remote_node_context(struct scic_sds_controller *scic,
 698                                                                  struct scic_sds_remote_device *sci_dev,
 699                                                                  u16 *node_id);
 700 void scic_sds_controller_free_remote_node_context(
 701         struct scic_sds_controller *scic,
 702         struct scic_sds_remote_device *sci_dev,
 703         u16 node_id);
 704 union scu_remote_node_context *scic_sds_controller_get_remote_node_context_buffer(
 705         struct scic_sds_controller *scic,
 706         u16 node_id);
 707
 708 struct scic_sds_request *scic_request_by_tag(struct scic_sds_controller *scic,
 709                                              u16 io_tag);
 710
 711 struct scu_task_context *scic_sds_controller_get_task_context_buffer(
 712         struct scic_sds_controller *scic,
 713         u16 io_tag);
 714
 715 void scic_sds_controller_power_control_queue_insert(
 716         struct scic_sds_controller *scic,
 717         struct scic_sds_phy *sci_phy);
 718
 719 void scic_sds_controller_power_control_queue_remove(
 720         struct scic_sds_controller *scic,
 721         struct scic_sds_phy *sci_phy);
 722
 723 void scic_sds_controller_link_up(
 724         struct scic_sds_controller *scic,
 725         struct scic_sds_port *sci_port,
 726         struct scic_sds_phy *sci_phy);
 727
 728 void scic_sds_controller_link_down(
 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_remote_device_stopped(
 734         struct scic_sds_controller *scic,
 735         struct scic_sds_remote_device *sci_dev);
 736
 737 void scic_sds_controller_copy_task_context(
 738         struct scic_sds_controller *scic,
 739         struct scic_sds_request *this_request);
 740
 741 void scic_sds_controller_register_setup(struct scic_sds_controller *scic);
 742
 743 enum sci_status scic_controller_continue_io(struct scic_sds_request *sci_req);
 744 int isci_host_scan_finished(struct Scsi_Host *, unsigned long);
 745 void isci_host_scan_start(struct Scsi_Host *);
 746
 747 int isci_host_init(struct isci_host *);
 748
 749 void isci_host_init_controller_names(
 750         struct isci_host *isci_host,
 751         unsigned int controller_idx);
 752
 753 void isci_host_deinit(
 754         struct isci_host *);
 755
 756 void isci_host_port_link_up(
 757         struct isci_host *,
 758         struct scic_sds_port *,
 759         struct scic_sds_phy *);
 760 int isci_host_dev_found(struct domain_device *);
 761
 762 void isci_host_remote_device_start_complete(
 763         struct isci_host *,
 764         struct isci_remote_device *,
 765         enum sci_status);
 766
 767 void scic_controller_disable_interrupts(
 768         struct scic_sds_controller *scic);
 769
 770 enum sci_status scic_controller_start_io(
 771         struct scic_sds_controller *scic,
 772         struct scic_sds_remote_device *remote_device,
 773         struct scic_sds_request *io_request,
 774         u16 io_tag);
 775
 776 enum sci_task_status scic_controller_start_task(
 777         struct scic_sds_controller *scic,
 778         struct scic_sds_remote_device *remote_device,
 779         struct scic_sds_request *task_request,
 780         u16 io_tag);
 781
 782 enum sci_status scic_controller_terminate_request(
 783         struct scic_sds_controller *scic,
 784         struct scic_sds_remote_device *remote_device,
 785         struct scic_sds_request *request);
 786
 787 enum sci_status scic_controller_complete_io(
 788         struct scic_sds_controller *scic,
 789         struct scic_sds_remote_device *remote_device,
 790         struct scic_sds_request *io_request);
 791
 792 u16 scic_controller_allocate_io_tag(
 793         struct scic_sds_controller *scic);
 794
 795 enum sci_status scic_controller_free_io_tag(
 796         struct scic_sds_controller *scic,
 797         u16 io_tag);
 798
 799 void scic_sds_port_configuration_agent_construct(
 800         struct scic_sds_port_configuration_agent *port_agent);
 801
 802 enum sci_status scic_sds_port_configuration_agent_initialize(
 803         struct scic_sds_controller *controller,
 804         struct scic_sds_port_configuration_agent *port_agent);
 805 #endif