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 #include <linux/bits.h> 28 29 /* Enclosure Management Control */ 30 #define EM_CTRL_MSG_TYPE 0x000f0000 31 32 /* Enclosure Management LED Message Type */ 33 #define EM_MSG_LED_HBA_PORT 0x0000000f 34 #define EM_MSG_LED_PMP_SLOT 0x0000ff00 35 #define EM_MSG_LED_VALUE 0xffff0000 36 #define EM_MSG_LED_VALUE_ACTIVITY 0x00070000 37 #define EM_MSG_LED_VALUE_OFF 0xfff80000 38 #define EM_MSG_LED_VALUE_ON 0x00010000 39 40 enum { 41 AHCI_MAX_PORTS = 32, 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 = BIT(31), 58 AHCI_CMD_ATAPI = BIT(5), 59 AHCI_CMD_WRITE = BIT(6), 60 AHCI_CMD_PREFETCH = BIT(7), 61 AHCI_CMD_RESET = BIT(8), 62 AHCI_CMD_CLR_BUSY = BIT(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 = BIT(0), /* reset controller; self-clear */ 81 HOST_IRQ_EN = BIT(1), /* global IRQ enable */ 82 HOST_MRSM = BIT(2), /* MSI Revert to Single Message */ 83 HOST_AHCI_EN = BIT(31), /* AHCI enabled */ 84 85 /* HOST_CAP bits */ 86 HOST_CAP_SXS = BIT(5), /* Supports External SATA */ 87 HOST_CAP_EMS = BIT(6), /* Enclosure Management support */ 88 HOST_CAP_CCC = BIT(7), /* Command Completion Coalescing */ 89 HOST_CAP_PART = BIT(13), /* Partial state capable */ 90 HOST_CAP_SSC = BIT(14), /* Slumber state capable */ 91 HOST_CAP_PIO_MULTI = BIT(15), /* PIO multiple DRQ support */ 92 HOST_CAP_FBS = BIT(16), /* FIS-based switching support */ 93 HOST_CAP_PMP = BIT(17), /* Port Multiplier support */ 94 HOST_CAP_ONLY = BIT(18), /* Supports AHCI mode only */ 95 HOST_CAP_CLO = BIT(24), /* Command List Override support */ 96 HOST_CAP_LED = BIT(25), /* Supports activity LED */ 97 HOST_CAP_ALPM = BIT(26), /* Aggressive Link PM support */ 98 HOST_CAP_SSS = BIT(27), /* Staggered Spin-up */ 99 HOST_CAP_MPS = BIT(28), /* Mechanical presence switch */ 100 HOST_CAP_SNTF = BIT(29), /* SNotification register */ 101 HOST_CAP_NCQ = BIT(30), /* Native Command Queueing */ 102 HOST_CAP_64 = BIT(31), /* PCI DAC (64-bit DMA) support */ 103 104 /* HOST_CAP2 bits */ 105 HOST_CAP2_BOH = BIT(0), /* BIOS/OS handoff supported */ 106 HOST_CAP2_NVMHCI = BIT(1), /* NVMHCI supported */ 107 HOST_CAP2_APST = BIT(2), /* Automatic partial to slumber */ 108 HOST_CAP2_SDS = BIT(3), /* Support device sleep */ 109 HOST_CAP2_SADM = BIT(4), /* Support aggressive DevSlp */ 110 HOST_CAP2_DESO = BIT(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 = BIT(31), /* cold presence detect */ 133 PORT_IRQ_TF_ERR = BIT(30), /* task file error */ 134 PORT_IRQ_HBUS_ERR = BIT(29), /* host bus fatal error */ 135 PORT_IRQ_HBUS_DATA_ERR = BIT(28), /* host bus data error */ 136 PORT_IRQ_IF_ERR = BIT(27), /* interface fatal error */ 137 PORT_IRQ_IF_NONFATAL = BIT(26), /* interface non-fatal error */ 138 PORT_IRQ_OVERFLOW = BIT(24), /* xfer exhausted available S/G */ 139 PORT_IRQ_BAD_PMP = BIT(23), /* incorrect port multiplier */ 140 141 PORT_IRQ_PHYRDY = BIT(22), /* PhyRdy changed */ 142 PORT_IRQ_DMPS = BIT(7), /* mechanical presence status */ 143 PORT_IRQ_CONNECT = BIT(6), /* port connect change status */ 144 PORT_IRQ_SG_DONE = BIT(5), /* descriptor processed */ 145 PORT_IRQ_UNK_FIS = BIT(4), /* unknown FIS rx'd */ 146 PORT_IRQ_SDB_FIS = BIT(3), /* Set Device Bits FIS rx'd */ 147 PORT_IRQ_DMAS_FIS = BIT(2), /* DMA Setup FIS rx'd */ 148 PORT_IRQ_PIOS_FIS = BIT(1), /* PIO Setup FIS rx'd */ 149 PORT_IRQ_D2H_REG_FIS = BIT(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 = BIT(27), /* Aggressive Slumber/Partial */ 166 PORT_CMD_ALPE = BIT(26), /* Aggressive Link PM enable */ 167 PORT_CMD_ATAPI = BIT(24), /* Device is ATAPI */ 168 PORT_CMD_FBSCP = BIT(22), /* FBS Capable Port */ 169 PORT_CMD_ESP = BIT(21), /* External Sata Port */ 170 PORT_CMD_CPD = BIT(20), /* Cold Presence Detection */ 171 PORT_CMD_MPSP = BIT(19), /* Mechanical Presence Switch */ 172 PORT_CMD_HPCP = BIT(18), /* HotPlug Capable Port */ 173 PORT_CMD_PMP = BIT(17), /* PMP attached */ 174 PORT_CMD_LIST_ON = BIT(15), /* cmd list DMA engine running */ 175 PORT_CMD_FIS_ON = BIT(14), /* FIS DMA engine running */ 176 PORT_CMD_FIS_RX = BIT(4), /* Enable FIS receive DMA engine */ 177 PORT_CMD_CLO = BIT(3), /* Command list override */ 178 PORT_CMD_POWER_ON = BIT(2), /* Power up device */ 179 PORT_CMD_SPIN_UP = BIT(1), /* Spin up device */ 180 PORT_CMD_START = BIT(0), /* Enable port DMA engine */ 181 182 PORT_CMD_ICC_MASK = (0xfu << 28), /* i/f ICC state mask */ 183 PORT_CMD_ICC_ACTIVE = (0x1u << 28), /* Put i/f in active state */ 184 PORT_CMD_ICC_PARTIAL = (0x2u << 28), /* Put i/f in partial state */ 185 PORT_CMD_ICC_SLUMBER = (0x6u << 28), /* Put i/f in slumber state */ 186 187 /* PORT_CMD capabilities mask */ 188 PORT_CMD_CAP = PORT_CMD_HPCP | PORT_CMD_MPSP | 189 PORT_CMD_CPD | PORT_CMD_ESP | PORT_CMD_FBSCP, 190 191 /* PORT_FBS bits */ 192 PORT_FBS_DWE_OFFSET = 16, /* FBS device with error offset */ 193 PORT_FBS_ADO_OFFSET = 12, /* FBS active dev optimization offset */ 194 PORT_FBS_DEV_OFFSET = 8, /* FBS device to issue offset */ 195 PORT_FBS_DEV_MASK = (0xf << PORT_FBS_DEV_OFFSET), /* FBS.DEV */ 196 PORT_FBS_SDE = BIT(2), /* FBS single device error */ 197 PORT_FBS_DEC = BIT(1), /* FBS device error clear */ 198 PORT_FBS_EN = BIT(0), /* Enable FBS */ 199 200 /* PORT_DEVSLP bits */ 201 PORT_DEVSLP_DM_OFFSET = 25, /* DITO multiplier offset */ 202 PORT_DEVSLP_DM_MASK = (0xf << 25), /* DITO multiplier mask */ 203 PORT_DEVSLP_DITO_OFFSET = 15, /* DITO offset */ 204 PORT_DEVSLP_MDAT_OFFSET = 10, /* Minimum assertion time */ 205 PORT_DEVSLP_DETO_OFFSET = 2, /* DevSlp exit timeout */ 206 PORT_DEVSLP_DSP = BIT(1), /* DevSlp present */ 207 PORT_DEVSLP_ADSE = BIT(0), /* Aggressive DevSlp enable */ 208 209 /* hpriv->flags bits */ 210 211 #define AHCI_HFLAGS(flags) .private_data = (void *)(flags) 212 213 AHCI_HFLAG_NO_NCQ = BIT(0), 214 AHCI_HFLAG_IGN_IRQ_IF_ERR = BIT(1), /* ignore IRQ_IF_ERR */ 215 AHCI_HFLAG_IGN_SERR_INTERNAL = BIT(2), /* ignore SERR_INTERNAL */ 216 AHCI_HFLAG_32BIT_ONLY = BIT(3), /* force 32bit */ 217 AHCI_HFLAG_MV_PATA = BIT(4), /* PATA port */ 218 AHCI_HFLAG_NO_MSI = BIT(5), /* no PCI MSI */ 219 AHCI_HFLAG_NO_PMP = BIT(6), /* no PMP */ 220 AHCI_HFLAG_SECT255 = BIT(8), /* max 255 sectors */ 221 AHCI_HFLAG_YES_NCQ = BIT(9), /* force NCQ cap on */ 222 AHCI_HFLAG_NO_SUSPEND = BIT(10), /* don't suspend */ 223 AHCI_HFLAG_SRST_TOUT_IS_OFFLINE = BIT(11), /* treat SRST timeout as 224 link offline */ 225 AHCI_HFLAG_NO_SNTF = BIT(12), /* no sntf */ 226 AHCI_HFLAG_NO_FPDMA_AA = BIT(13), /* no FPDMA AA */ 227 AHCI_HFLAG_YES_FBS = BIT(14), /* force FBS cap on */ 228 AHCI_HFLAG_DELAY_ENGINE = BIT(15), /* do not start engine on 229 port start (wait until 230 error-handling stage) */ 231 AHCI_HFLAG_NO_DEVSLP = BIT(17), /* no device sleep */ 232 AHCI_HFLAG_NO_FBS = BIT(18), /* no FBS */ 233 234 #ifdef CONFIG_PCI_MSI 235 AHCI_HFLAG_MULTI_MSI = BIT(20), /* per-port MSI(-X) */ 236 #else 237 /* compile out MSI infrastructure */ 238 AHCI_HFLAG_MULTI_MSI = 0, 239 #endif 240 AHCI_HFLAG_WAKE_BEFORE_STOP = BIT(22), /* wake before DMA stop */ 241 AHCI_HFLAG_YES_ALPM = BIT(23), /* force ALPM cap on */ 242 AHCI_HFLAG_NO_WRITE_TO_RO = BIT(24), /* don't write to read 243 only registers */ 244 AHCI_HFLAG_USE_LPM_POLICY = BIT(25), /* chipset that should use 245 SATA_MOBILE_LPM_POLICY 246 as default lpm_policy */ 247 AHCI_HFLAG_SUSPEND_PHYS = BIT(26), /* handle PHYs during 248 suspend/resume */ 249 AHCI_HFLAG_NO_SXS = BIT(28), /* SXS not supported */ 250 251 /* ap->flags bits */ 252 253 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | 254 ATA_FLAG_ACPI_SATA | ATA_FLAG_AN, 255 256 ICH_MAP = 0x90, /* ICH MAP register */ 257 PCS_6 = 0x92, /* 6 port PCS */ 258 PCS_7 = 0x94, /* 7+ port PCS (Denverton) */ 259 260 /* em constants */ 261 EM_MAX_SLOTS = SATA_PMP_MAX_PORTS, 262 EM_MAX_RETRY = 5, 263 264 /* em_ctl bits */ 265 EM_CTL_RST = BIT(9), /* Reset */ 266 EM_CTL_TM = BIT(8), /* Transmit Message */ 267 EM_CTL_MR = BIT(0), /* Message Received */ 268 EM_CTL_ALHD = BIT(26), /* Activity LED */ 269 EM_CTL_XMT = BIT(25), /* Transmit Only */ 270 EM_CTL_SMB = BIT(24), /* Single Message Buffer */ 271 EM_CTL_SGPIO = BIT(19), /* SGPIO messages supported */ 272 EM_CTL_SES = BIT(18), /* SES-2 messages supported */ 273 EM_CTL_SAFTE = BIT(17), /* SAF-TE messages supported */ 274 EM_CTL_LED = BIT(16), /* LED messages supported */ 275 276 /* em message type */ 277 EM_MSG_TYPE_LED = BIT(0), /* LED */ 278 EM_MSG_TYPE_SAFTE = BIT(1), /* SAF-TE */ 279 EM_MSG_TYPE_SES2 = BIT(2), /* SES-2 */ 280 EM_MSG_TYPE_SGPIO = BIT(3), /* SGPIO */ 281 }; 282 283 struct ahci_cmd_hdr { 284 __le32 opts; 285 __le32 status; 286 __le32 tbl_addr; 287 __le32 tbl_addr_hi; 288 __le32 reserved[4]; 289 }; 290 291 struct ahci_sg { 292 __le32 addr; 293 __le32 addr_hi; 294 __le32 reserved; 295 __le32 flags_size; 296 }; 297 298 struct ahci_em_priv { 299 enum sw_activity blink_policy; 300 struct timer_list timer; 301 unsigned long saved_activity; 302 unsigned long activity; 303 unsigned long led_state; 304 struct ata_link *link; 305 }; 306 307 struct ahci_port_priv { 308 struct ata_link *active_link; 309 struct ahci_cmd_hdr *cmd_slot; 310 dma_addr_t cmd_slot_dma; 311 void *cmd_tbl; 312 dma_addr_t cmd_tbl_dma; 313 void *rx_fis; 314 dma_addr_t rx_fis_dma; 315 /* for NCQ spurious interrupt analysis */ 316 unsigned int ncq_saw_d2h:1; 317 unsigned int ncq_saw_dmas:1; 318 unsigned int ncq_saw_sdb:1; 319 spinlock_t lock; /* protects parent ata_port */ 320 u32 intr_mask; /* interrupts to enable */ 321 bool fbs_supported; /* set iff FBS is supported */ 322 bool fbs_enabled; /* set iff FBS is enabled */ 323 int fbs_last_dev; /* save FBS.DEV of last FIS */ 324 /* enclosure management info per PM slot */ 325 struct ahci_em_priv em_priv[EM_MAX_SLOTS]; 326 char *irq_desc; /* desc in /proc/interrupts */ 327 }; 328 329 struct ahci_host_priv { 330 /* Input fields */ 331 unsigned int flags; /* AHCI_HFLAG_* */ 332 u32 mask_port_map; /* mask out particular bits */ 333 334 void __iomem * mmio; /* bus-independent mem map */ 335 u32 cap; /* cap to use */ 336 u32 cap2; /* cap2 to use */ 337 u32 version; /* cached version */ 338 u32 port_map; /* port map to use */ 339 u32 saved_cap; /* saved initial cap */ 340 u32 saved_cap2; /* saved initial cap2 */ 341 u32 saved_port_map; /* saved initial port_map */ 342 u32 saved_port_cap[AHCI_MAX_PORTS]; /* saved port_cap */ 343 u32 em_loc; /* enclosure management location */ 344 u32 em_buf_sz; /* EM buffer size in byte */ 345 u32 em_msg_type; /* EM message type */ 346 u32 remapped_nvme; /* NVMe remapped device count */ 347 bool got_runtime_pm; /* Did we do pm_runtime_get? */ 348 unsigned int n_clks; 349 struct clk_bulk_data *clks; /* Optional */ 350 unsigned int f_rsts; 351 struct reset_control *rsts; /* Optional */ 352 struct regulator **target_pwrs; /* Optional */ 353 struct regulator *ahci_regulator;/* Optional */ 354 struct regulator *phy_regulator;/* Optional */ 355 /* 356 * If platform uses PHYs. There is a 1:1 relation between the port number and 357 * the PHY position in this array. 358 */ 359 struct phy **phys; 360 unsigned nports; /* Number of ports */ 361 void *plat_data; /* Other platform data */ 362 unsigned int irq; /* interrupt line */ 363 /* 364 * Optional ahci_start_engine override, if not set this gets set to the 365 * default ahci_start_engine during ahci_save_initial_config, this can 366 * be overridden anytime before the host is activated. 367 */ 368 void (*start_engine)(struct ata_port *ap); 369 /* 370 * Optional ahci_stop_engine override, if not set this gets set to the 371 * default ahci_stop_engine during ahci_save_initial_config, this can 372 * be overridden anytime before the host is activated. 373 */ 374 int (*stop_engine)(struct ata_port *ap); 375 376 irqreturn_t (*irq_handler)(int irq, void *dev_instance); 377 378 /* only required for per-port MSI(-X) support */ 379 int (*get_irq_vector)(struct ata_host *host, 380 int port); 381 }; 382 383 extern int ahci_ignore_sss; 384 385 extern const struct attribute_group *ahci_shost_groups[]; 386 extern const struct attribute_group *ahci_sdev_groups[]; 387 388 /* 389 * This must be instantiated by the edge drivers. Read the comments 390 * for ATA_BASE_SHT 391 */ 392 #define AHCI_SHT(drv_name) \ 393 __ATA_BASE_SHT(drv_name), \ 394 .can_queue = AHCI_MAX_CMDS, \ 395 .sg_tablesize = AHCI_MAX_SG, \ 396 .dma_boundary = AHCI_DMA_BOUNDARY, \ 397 .shost_groups = ahci_shost_groups, \ 398 .sdev_groups = ahci_sdev_groups, \ 399 .change_queue_depth = ata_scsi_change_queue_depth, \ 400 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \ 401 .slave_configure = ata_scsi_slave_config 402 403 extern struct ata_port_operations ahci_ops; 404 extern struct ata_port_operations ahci_platform_ops; 405 extern struct ata_port_operations ahci_pmp_retry_srst_ops; 406 407 unsigned int ahci_dev_classify(struct ata_port *ap); 408 void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, 409 u32 opts); 410 void ahci_save_initial_config(struct device *dev, 411 struct ahci_host_priv *hpriv); 412 void ahci_init_controller(struct ata_host *host); 413 int ahci_reset_controller(struct ata_host *host); 414 415 int ahci_do_softreset(struct ata_link *link, unsigned int *class, 416 int pmp, unsigned long deadline, 417 int (*check_ready)(struct ata_link *link)); 418 419 int ahci_do_hardreset(struct ata_link *link, unsigned int *class, 420 unsigned long deadline, bool *online); 421 422 unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); 423 int ahci_stop_engine(struct ata_port *ap); 424 void ahci_start_fis_rx(struct ata_port *ap); 425 void ahci_start_engine(struct ata_port *ap); 426 int ahci_check_ready(struct ata_link *link); 427 int ahci_kick_engine(struct ata_port *ap); 428 int ahci_port_resume(struct ata_port *ap); 429 void ahci_set_em_messages(struct ahci_host_priv *hpriv, 430 struct ata_port_info *pi); 431 int ahci_reset_em(struct ata_host *host); 432 void ahci_print_info(struct ata_host *host, const char *scc_s); 433 int ahci_host_activate(struct ata_host *host, const struct scsi_host_template *sht); 434 void ahci_error_handler(struct ata_port *ap); 435 u32 ahci_handle_port_intr(struct ata_host *host, u32 irq_masked); 436 437 static inline void __iomem *__ahci_port_base(struct ahci_host_priv *hpriv, 438 unsigned int port_no) 439 { 440 void __iomem *mmio = hpriv->mmio; 441 442 return mmio + 0x100 + (port_no * 0x80); 443 } 444 445 static inline void __iomem *ahci_port_base(struct ata_port *ap) 446 { 447 struct ahci_host_priv *hpriv = ap->host->private_data; 448 449 return __ahci_port_base(hpriv, ap->port_no); 450 } 451 452 static inline int ahci_nr_ports(u32 cap) 453 { 454 return (cap & 0x1f) + 1; 455 } 456 457 #endif /* _AHCI_H */ 458