LXR linux/drivers/ata/ahci.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *  ahci.h - Common AHCI SATA definitions and declarations
   4 *
   5 *  Maintained by:  Tejun Heo <tj@kernel.org>
   6 *                  Please ALWAYS copy linux-ide@vger.kernel.org
   7 *                  on emails.
   8 *
   9 *  Copyright 2004-2005 Red Hat, Inc.
  10 *
  11 * libata documentation is available via 'make {ps|pdf}docs',
  12 * as Documentation/driver-api/libata.rst
  13 *
  14 * AHCI hardware documentation:
  15 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
  16 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
  17 */
  18
  19#ifndef _AHCI_H
  20#define _AHCI_H
  21
  22#include <linux/pci.h>
  23#include <linux/clk.h>
  24#include <linux/libata.h>
  25#include <linux/phy/phy.h>
  26#include <linux/regulator/consumer.h>
  27
  28/* Enclosure Management Control */
  29#define EM_CTRL_MSG_TYPE              0x000f0000
  30
  31/* Enclosure Management LED Message Type */
  32#define EM_MSG_LED_HBA_PORT           0x0000000f
  33#define EM_MSG_LED_PMP_SLOT           0x0000ff00
  34#define EM_MSG_LED_VALUE              0xffff0000
  35#define EM_MSG_LED_VALUE_ACTIVITY     0x00070000
  36#define EM_MSG_LED_VALUE_OFF          0xfff80000
  37#define EM_MSG_LED_VALUE_ON           0x00010000
  38
  39enum {
  40        AHCI_MAX_PORTS          = 32,
  41        AHCI_MAX_CLKS           = 5,
  42        AHCI_MAX_SG             = 168, /* hardware max is 64K */
  43        AHCI_DMA_BOUNDARY       = 0xffffffff,
  44        AHCI_MAX_CMDS           = 32,
  45        AHCI_CMD_SZ             = 32,
  46        AHCI_CMD_SLOT_SZ        = AHCI_MAX_CMDS * AHCI_CMD_SZ,
  47        AHCI_RX_FIS_SZ          = 256,
  48        AHCI_CMD_TBL_CDB        = 0x40,
  49        AHCI_CMD_TBL_HDR_SZ     = 0x80,
  50        AHCI_CMD_TBL_SZ         = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
  51        AHCI_CMD_TBL_AR_SZ      = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
  52        AHCI_PORT_PRIV_DMA_SZ   = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
  53                                  AHCI_RX_FIS_SZ,
  54        AHCI_PORT_PRIV_FBS_DMA_SZ       = AHCI_CMD_SLOT_SZ +
  55                                          AHCI_CMD_TBL_AR_SZ +
  56                                          (AHCI_RX_FIS_SZ * 16),
  57        AHCI_IRQ_ON_SG          = (1 << 31),
  58        AHCI_CMD_ATAPI          = (1 << 5),
  59        AHCI_CMD_WRITE          = (1 << 6),
  60        AHCI_CMD_PREFETCH       = (1 << 7),
  61        AHCI_CMD_RESET          = (1 << 8),
  62        AHCI_CMD_CLR_BUSY       = (1 << 10),
  63
  64        RX_FIS_PIO_SETUP        = 0x20, /* offset of PIO Setup FIS data */
  65        RX_FIS_D2H_REG          = 0x40, /* offset of D2H Register FIS data */
  66        RX_FIS_SDB              = 0x58, /* offset of SDB FIS data */
  67        RX_FIS_UNK              = 0x60, /* offset of Unknown FIS data */
  68
  69        /* global controller registers */
  70        HOST_CAP                = 0x00, /* host capabilities */
  71        HOST_CTL                = 0x04, /* global host control */
  72        HOST_IRQ_STAT           = 0x08, /* interrupt status */
  73        HOST_PORTS_IMPL         = 0x0c, /* bitmap of implemented ports */
  74        HOST_VERSION            = 0x10, /* AHCI spec. version compliancy */
  75        HOST_EM_LOC             = 0x1c, /* Enclosure Management location */
  76        HOST_EM_CTL             = 0x20, /* Enclosure Management Control */
  77        HOST_CAP2               = 0x24, /* host capabilities, extended */
  78
  79        /* HOST_CTL bits */
  80        HOST_RESET              = (1 << 0),  /* reset controller; self-clear */
  81        HOST_IRQ_EN             = (1 << 1),  /* global IRQ enable */
  82        HOST_MRSM               = (1 << 2),  /* MSI Revert to Single Message */
  83        HOST_AHCI_EN            = (1 << 31), /* AHCI enabled */
  84
  85        /* HOST_CAP bits */
  86        HOST_CAP_SXS            = (1 << 5),  /* Supports External SATA */
  87        HOST_CAP_EMS            = (1 << 6),  /* Enclosure Management support */
  88        HOST_CAP_CCC            = (1 << 7),  /* Command Completion Coalescing */
  89        HOST_CAP_PART           = (1 << 13), /* Partial state capable */
  90        HOST_CAP_SSC            = (1 << 14), /* Slumber state capable */
  91        HOST_CAP_PIO_MULTI      = (1 << 15), /* PIO multiple DRQ support */
  92        HOST_CAP_FBS            = (1 << 16), /* FIS-based switching support */
  93        HOST_CAP_PMP            = (1 << 17), /* Port Multiplier support */
  94        HOST_CAP_ONLY           = (1 << 18), /* Supports AHCI mode only */
  95        HOST_CAP_CLO            = (1 << 24), /* Command List Override support */
  96        HOST_CAP_LED            = (1 << 25), /* Supports activity LED */
  97        HOST_CAP_ALPM           = (1 << 26), /* Aggressive Link PM support */
  98        HOST_CAP_SSS            = (1 << 27), /* Staggered Spin-up */
  99        HOST_CAP_MPS            = (1 << 28), /* Mechanical presence switch */
 100        HOST_CAP_SNTF           = (1 << 29), /* SNotification register */
 101        HOST_CAP_NCQ            = (1 << 30), /* Native Command Queueing */
 102        HOST_CAP_64             = (1 << 31), /* PCI DAC (64-bit DMA) support */
 103
 104        /* HOST_CAP2 bits */
 105        HOST_CAP2_BOH           = (1 << 0),  /* BIOS/OS handoff supported */
 106        HOST_CAP2_NVMHCI        = (1 << 1),  /* NVMHCI supported */
 107        HOST_CAP2_APST          = (1 << 2),  /* Automatic partial to slumber */
 108        HOST_CAP2_SDS           = (1 << 3),  /* Support device sleep */
 109        HOST_CAP2_SADM          = (1 << 4),  /* Support aggressive DevSlp */
 110        HOST_CAP2_DESO          = (1 << 5),  /* DevSlp from slumber only */
 111
 112        /* registers for each SATA port */
 113        PORT_LST_ADDR           = 0x00, /* command list DMA addr */
 114        PORT_LST_ADDR_HI        = 0x04, /* command list DMA addr hi */
 115        PORT_FIS_ADDR           = 0x08, /* FIS rx buf addr */
 116        PORT_FIS_ADDR_HI        = 0x0c, /* FIS rx buf addr hi */
 117        PORT_IRQ_STAT           = 0x10, /* interrupt status */
 118        PORT_IRQ_MASK           = 0x14, /* interrupt enable/disable mask */
 119        PORT_CMD                = 0x18, /* port command */
 120        PORT_TFDATA             = 0x20, /* taskfile data */
 121        PORT_SIG                = 0x24, /* device TF signature */
 122        PORT_CMD_ISSUE          = 0x38, /* command issue */
 123        PORT_SCR_STAT           = 0x28, /* SATA phy register: SStatus */
 124        PORT_SCR_CTL            = 0x2c, /* SATA phy register: SControl */
 125        PORT_SCR_ERR            = 0x30, /* SATA phy register: SError */
 126        PORT_SCR_ACT            = 0x34, /* SATA phy register: SActive */
 127        PORT_SCR_NTF            = 0x3c, /* SATA phy register: SNotification */
 128        PORT_FBS                = 0x40, /* FIS-based Switching */
 129        PORT_DEVSLP             = 0x44, /* device sleep */
 130
 131        /* PORT_IRQ_{STAT,MASK} bits */
 132        PORT_IRQ_COLD_PRES      = (1 << 31), /* cold presence detect */
 133        PORT_IRQ_TF_ERR         = (1 << 30), /* task file error */
 134        PORT_IRQ_HBUS_ERR       = (1 << 29), /* host bus fatal error */
 135        PORT_IRQ_HBUS_DATA_ERR  = (1 << 28), /* host bus data error */
 136        PORT_IRQ_IF_ERR         = (1 << 27), /* interface fatal error */
 137        PORT_IRQ_IF_NONFATAL    = (1 << 26), /* interface non-fatal error */
 138        PORT_IRQ_OVERFLOW       = (1 << 24), /* xfer exhausted available S/G */
 139        PORT_IRQ_BAD_PMP        = (1 << 23), /* incorrect port multiplier */
 140
 141        PORT_IRQ_PHYRDY         = (1 << 22), /* PhyRdy changed */
 142        PORT_IRQ_DEV_ILCK       = (1 << 7), /* device interlock */
 143        PORT_IRQ_CONNECT        = (1 << 6), /* port connect change status */
 144        PORT_IRQ_SG_DONE        = (1 << 5), /* descriptor processed */
 145        PORT_IRQ_UNK_FIS        = (1 << 4), /* unknown FIS rx'd */
 146        PORT_IRQ_SDB_FIS        = (1 << 3), /* Set Device Bits FIS rx'd */
 147        PORT_IRQ_DMAS_FIS       = (1 << 2), /* DMA Setup FIS rx'd */
 148        PORT_IRQ_PIOS_FIS       = (1 << 1), /* PIO Setup FIS rx'd */
 149        PORT_IRQ_D2H_REG_FIS    = (1 << 0), /* D2H Register FIS rx'd */
 150
 151        PORT_IRQ_FREEZE         = PORT_IRQ_HBUS_ERR |
 152                                  PORT_IRQ_IF_ERR |
 153                                  PORT_IRQ_CONNECT |
 154                                  PORT_IRQ_PHYRDY |
 155                                  PORT_IRQ_UNK_FIS |
 156                                  PORT_IRQ_BAD_PMP,
 157        PORT_IRQ_ERROR          = PORT_IRQ_FREEZE |
 158                                  PORT_IRQ_TF_ERR |
 159                                  PORT_IRQ_HBUS_DATA_ERR,
 160        DEF_PORT_IRQ            = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
 161                                  PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
 162                                  PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
 163
 164        /* PORT_CMD bits */
 165        PORT_CMD_ASP            = (1 << 27), /* Aggressive Slumber/Partial */
 166        PORT_CMD_ALPE           = (1 << 26), /* Aggressive Link PM enable */
 167        PORT_CMD_ATAPI          = (1 << 24), /* Device is ATAPI */
 168        PORT_CMD_FBSCP          = (1 << 22), /* FBS Capable Port */
 169        PORT_CMD_ESP            = (1 << 21), /* External Sata Port */
 170        PORT_CMD_HPCP           = (1 << 18), /* HotPlug Capable Port */
 171        PORT_CMD_PMP            = (1 << 17), /* PMP attached */
 172        PORT_CMD_LIST_ON        = (1 << 15), /* cmd list DMA engine running */
 173        PORT_CMD_FIS_ON         = (1 << 14), /* FIS DMA engine running */
 174        PORT_CMD_FIS_RX         = (1 << 4), /* Enable FIS receive DMA engine */
 175        PORT_CMD_CLO            = (1 << 3), /* Command list override */
 176        PORT_CMD_POWER_ON       = (1 << 2), /* Power up device */
 177        PORT_CMD_SPIN_UP        = (1 << 1), /* Spin up device */
 178        PORT_CMD_START          = (1 << 0), /* Enable port DMA engine */
 179
 180        PORT_CMD_ICC_MASK       = (0xf << 28), /* i/f ICC state mask */
 181        PORT_CMD_ICC_ACTIVE     = (0x1 << 28), /* Put i/f in active state */
 182        PORT_CMD_ICC_PARTIAL    = (0x2 << 28), /* Put i/f in partial state */
 183        PORT_CMD_ICC_SLUMBER    = (0x6 << 28), /* Put i/f in slumber state */
 184
 185        /* PORT_FBS bits */
 186        PORT_FBS_DWE_OFFSET     = 16, /* FBS device with error offset */
 187        PORT_FBS_ADO_OFFSET     = 12, /* FBS active dev optimization offset */
 188        PORT_FBS_DEV_OFFSET     = 8,  /* FBS device to issue offset */
 189        PORT_FBS_DEV_MASK       = (0xf << PORT_FBS_DEV_OFFSET),  /* FBS.DEV */
 190        PORT_FBS_SDE            = (1 << 2), /* FBS single device error */
 191        PORT_FBS_DEC            = (1 << 1), /* FBS device error clear */
 192        PORT_FBS_EN             = (1 << 0), /* Enable FBS */
 193
 194        /* PORT_DEVSLP bits */
 195        PORT_DEVSLP_DM_OFFSET   = 25,             /* DITO multiplier offset */
 196        PORT_DEVSLP_DM_MASK     = (0xf << 25),    /* DITO multiplier mask */
 197        PORT_DEVSLP_DITO_OFFSET = 15,             /* DITO offset */
 198        PORT_DEVSLP_MDAT_OFFSET = 10,             /* Minimum assertion time */
 199        PORT_DEVSLP_DETO_OFFSET = 2,              /* DevSlp exit timeout */
 200        PORT_DEVSLP_DSP         = (1 << 1),       /* DevSlp present */
 201        PORT_DEVSLP_ADSE        = (1 << 0),       /* Aggressive DevSlp enable */
 202
 203        /* hpriv->flags bits */
 204
 205#define AHCI_HFLAGS(flags)              .private_data   = (void *)(flags)
 206
 207        AHCI_HFLAG_NO_NCQ               = (1 << 0),
 208        AHCI_HFLAG_IGN_IRQ_IF_ERR       = (1 << 1), /* ignore IRQ_IF_ERR */
 209        AHCI_HFLAG_IGN_SERR_INTERNAL    = (1 << 2), /* ignore SERR_INTERNAL */
 210        AHCI_HFLAG_32BIT_ONLY           = (1 << 3), /* force 32bit */
 211        AHCI_HFLAG_MV_PATA              = (1 << 4), /* PATA port */
 212        AHCI_HFLAG_NO_MSI               = (1 << 5), /* no PCI MSI */
 213        AHCI_HFLAG_NO_PMP               = (1 << 6), /* no PMP */
 214        AHCI_HFLAG_SECT255              = (1 << 8), /* max 255 sectors */
 215        AHCI_HFLAG_YES_NCQ              = (1 << 9), /* force NCQ cap on */
 216        AHCI_HFLAG_NO_SUSPEND           = (1 << 10), /* don't suspend */
 217        AHCI_HFLAG_SRST_TOUT_IS_OFFLINE = (1 << 11), /* treat SRST timeout as
 218                                                        link offline */
 219        AHCI_HFLAG_NO_SNTF              = (1 << 12), /* no sntf */
 220        AHCI_HFLAG_NO_FPDMA_AA          = (1 << 13), /* no FPDMA AA */
 221        AHCI_HFLAG_YES_FBS              = (1 << 14), /* force FBS cap on */
 222        AHCI_HFLAG_DELAY_ENGINE         = (1 << 15), /* do not start engine on
 223                                                        port start (wait until
 224                                                        error-handling stage) */
 225        AHCI_HFLAG_NO_DEVSLP            = (1 << 17), /* no device sleep */
 226        AHCI_HFLAG_NO_FBS               = (1 << 18), /* no FBS */
 227
 228#ifdef CONFIG_PCI_MSI
 229        AHCI_HFLAG_MULTI_MSI            = (1 << 20), /* per-port MSI(-X) */
 230#else
 231        /* compile out MSI infrastructure */
 232        AHCI_HFLAG_MULTI_MSI            = 0,
 233#endif
 234        AHCI_HFLAG_WAKE_BEFORE_STOP     = (1 << 22), /* wake before DMA stop */
 235        AHCI_HFLAG_YES_ALPM             = (1 << 23), /* force ALPM cap on */
 236        AHCI_HFLAG_NO_WRITE_TO_RO       = (1 << 24), /* don't write to read
 237                                                        only registers */
 238        AHCI_HFLAG_IS_MOBILE            = (1 << 25), /* mobile chipset, use
 239                                                        SATA_MOBILE_LPM_POLICY
 240                                                        as default lpm_policy */
 241        AHCI_HFLAG_SUSPEND_PHYS         = (1 << 26), /* handle PHYs during
 242                                                        suspend/resume */
 243
 244        /* ap->flags bits */
 245
 246        AHCI_FLAG_COMMON                = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
 247                                          ATA_FLAG_ACPI_SATA | ATA_FLAG_AN,
 248
 249        ICH_MAP                         = 0x90, /* ICH MAP register */
 250
 251        /* em constants */
 252        EM_MAX_SLOTS                    = 8,
 253        EM_MAX_RETRY                    = 5,
 254
 255        /* em_ctl bits */
 256        EM_CTL_RST              = (1 << 9), /* Reset */
 257        EM_CTL_TM               = (1 << 8), /* Transmit Message */
 258        EM_CTL_MR               = (1 << 0), /* Message Received */
 259        EM_CTL_ALHD             = (1 << 26), /* Activity LED */
 260        EM_CTL_XMT              = (1 << 25), /* Transmit Only */
 261        EM_CTL_SMB              = (1 << 24), /* Single Message Buffer */
 262        EM_CTL_SGPIO            = (1 << 19), /* SGPIO messages supported */
 263        EM_CTL_SES              = (1 << 18), /* SES-2 messages supported */
 264        EM_CTL_SAFTE            = (1 << 17), /* SAF-TE messages supported */
 265        EM_CTL_LED              = (1 << 16), /* LED messages supported */
 266
 267        /* em message type */
 268        EM_MSG_TYPE_LED         = (1 << 0), /* LED */
 269        EM_MSG_TYPE_SAFTE       = (1 << 1), /* SAF-TE */
 270        EM_MSG_TYPE_SES2        = (1 << 2), /* SES-2 */
 271        EM_MSG_TYPE_SGPIO       = (1 << 3), /* SGPIO */
 272};
 273
 274struct ahci_cmd_hdr {
 275        __le32                  opts;
 276        __le32                  status;
 277        __le32                  tbl_addr;
 278        __le32                  tbl_addr_hi;
 279        __le32                  reserved[4];
 280};
 281
 282struct ahci_sg {
 283        __le32                  addr;
 284        __le32                  addr_hi;
 285        __le32                  reserved;
 286        __le32                  flags_size;
 287};
 288
 289struct ahci_em_priv {
 290        enum sw_activity blink_policy;
 291        struct timer_list timer;
 292        unsigned long saved_activity;
 293        unsigned long activity;
 294        unsigned long led_state;
 295        struct ata_link *link;
 296};
 297
 298struct ahci_port_priv {
 299        struct ata_link         *active_link;
 300        struct ahci_cmd_hdr     *cmd_slot;
 301        dma_addr_t              cmd_slot_dma;
 302        void                    *cmd_tbl;
 303        dma_addr_t              cmd_tbl_dma;
 304        void                    *rx_fis;
 305        dma_addr_t              rx_fis_dma;
 306        /* for NCQ spurious interrupt analysis */
 307        unsigned int            ncq_saw_d2h:1;
 308        unsigned int            ncq_saw_dmas:1;
 309        unsigned int            ncq_saw_sdb:1;
 310        spinlock_t              lock;           /* protects parent ata_port */
 311        u32                     intr_mask;      /* interrupts to enable */
 312        bool                    fbs_supported;  /* set iff FBS is supported */
 313        bool                    fbs_enabled;    /* set iff FBS is enabled */
 314        int                     fbs_last_dev;   /* save FBS.DEV of last FIS */
 315        /* enclosure management info per PM slot */
 316        struct ahci_em_priv     em_priv[EM_MAX_SLOTS];
 317        char                    *irq_desc;      /* desc in /proc/interrupts */
 318};
 319
 320struct ahci_host_priv {
 321        /* Input fields */
 322        unsigned int            flags;          /* AHCI_HFLAG_* */
 323        u32                     force_port_map; /* force port map */
 324        u32                     mask_port_map;  /* mask out particular bits */
 325
 326        void __iomem *          mmio;           /* bus-independent mem map */
 327        u32                     cap;            /* cap to use */
 328        u32                     cap2;           /* cap2 to use */
 329        u32                     version;        /* cached version */
 330        u32                     port_map;       /* port map to use */
 331        u32                     saved_cap;      /* saved initial cap */
 332        u32                     saved_cap2;     /* saved initial cap2 */
 333        u32                     saved_port_map; /* saved initial port_map */
 334        u32                     em_loc; /* enclosure management location */
 335        u32                     em_buf_sz;      /* EM buffer size in byte */
 336        u32                     em_msg_type;    /* EM message type */
 337        bool                    got_runtime_pm; /* Did we do pm_runtime_get? */
 338        struct clk              *clks[AHCI_MAX_CLKS]; /* Optional */
 339        struct reset_control    *rsts;          /* Optional */
 340        struct regulator        **target_pwrs;  /* Optional */
 341        struct regulator        *ahci_regulator;/* Optional */
 342        struct regulator        *phy_regulator;/* Optional */
 343        /*
 344         * If platform uses PHYs. There is a 1:1 relation between the port number and
 345         * the PHY position in this array.
 346         */
 347        struct phy              **phys;
 348        unsigned                nports;         /* Number of ports */
 349        void                    *plat_data;     /* Other platform data */
 350        unsigned int            irq;            /* interrupt line */
 351        /*
 352         * Optional ahci_start_engine override, if not set this gets set to the
 353         * default ahci_start_engine during ahci_save_initial_config, this can
 354         * be overridden anytime before the host is activated.
 355         */
 356        void                    (*start_engine)(struct ata_port *ap);
 357        /*
 358         * Optional ahci_stop_engine override, if not set this gets set to the
 359         * default ahci_stop_engine during ahci_save_initial_config, this can
 360         * be overridden anytime before the host is activated.
 361         */
 362        int                     (*stop_engine)(struct ata_port *ap);
 363
 364        irqreturn_t             (*irq_handler)(int irq, void *dev_instance);
 365
 366        /* only required for per-port MSI(-X) support */
 367        int                     (*get_irq_vector)(struct ata_host *host,
 368                                                  int port);
 369};
 370
 371extern int ahci_ignore_sss;
 372
 373extern struct device_attribute *ahci_shost_attrs[];
 374extern struct device_attribute *ahci_sdev_attrs[];
 375
 376/*
 377 * This must be instantiated by the edge drivers.  Read the comments
 378 * for ATA_BASE_SHT
 379 */
 380#define AHCI_SHT(drv_name)                                              \
 381        ATA_NCQ_SHT(drv_name),                                          \
 382        .can_queue              = AHCI_MAX_CMDS,                        \
 383        .sg_tablesize           = AHCI_MAX_SG,                          \
 384        .dma_boundary           = AHCI_DMA_BOUNDARY,                    \
 385        .shost_attrs            = ahci_shost_attrs,                     \
 386        .sdev_attrs             = ahci_sdev_attrs
 387
 388extern struct ata_port_operations ahci_ops;
 389extern struct ata_port_operations ahci_platform_ops;
 390extern struct ata_port_operations ahci_pmp_retry_srst_ops;
 391
 392unsigned int ahci_dev_classify(struct ata_port *ap);
 393void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
 394                        u32 opts);
 395void ahci_save_initial_config(struct device *dev,
 396                              struct ahci_host_priv *hpriv);
 397void ahci_init_controller(struct ata_host *host);
 398int ahci_reset_controller(struct ata_host *host);
 399
 400int ahci_do_softreset(struct ata_link *link, unsigned int *class,
 401                      int pmp, unsigned long deadline,
 402                      int (*check_ready)(struct ata_link *link));
 403
 404int ahci_do_hardreset(struct ata_link *link, unsigned int *class,
 405                      unsigned long deadline, bool *online);
 406
 407unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
 408int ahci_stop_engine(struct ata_port *ap);
 409void ahci_start_fis_rx(struct ata_port *ap);
 410void ahci_start_engine(struct ata_port *ap);
 411int ahci_check_ready(struct ata_link *link);
 412int ahci_kick_engine(struct ata_port *ap);
 413int ahci_port_resume(struct ata_port *ap);
 414void ahci_set_em_messages(struct ahci_host_priv *hpriv,
 415                          struct ata_port_info *pi);
 416int ahci_reset_em(struct ata_host *host);
 417void ahci_print_info(struct ata_host *host, const char *scc_s);
 418int ahci_host_activate(struct ata_host *host, struct scsi_host_template *sht);
 419void ahci_error_handler(struct ata_port *ap);
 420u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked);
 421
 422static inline void __iomem *__ahci_port_base(struct ata_host *host,
 423                                             unsigned int port_no)
 424{
 425        struct ahci_host_priv *hpriv = host->private_data;
 426        void __iomem *mmio = hpriv->mmio;
 427
 428        return mmio + 0x100 + (port_no * 0x80);
 429}
 430
 431static inline void __iomem *ahci_port_base(struct ata_port *ap)
 432{
 433        return __ahci_port_base(ap->host, ap->port_no);
 434}
 435
 436static inline int ahci_nr_ports(u32 cap)
 437{
 438        return (cap & 0x1f) + 1;
 439}
 440
 441#endif /* _AHCI_H */
 442