| 1 | /* |
| 2 | * Copyright 2003-2005 Red Hat, Inc. All rights reserved. |
| 3 | * Copyright 2003-2005 Jeff Garzik |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; see the file COPYING. If not, write to |
| 18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | * |
| 20 | * |
| 21 | * libata documentation is available via 'make {ps|pdf}docs', |
| 22 | * as Documentation/DocBook/libata.* |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #ifndef __LINUX_LIBATA_H__ |
| 27 | #define __LINUX_LIBATA_H__ |
| 28 | |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/interrupt.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/dma-mapping.h> |
| 33 | #include <asm/scatterlist.h> |
| 34 | #include <linux/io.h> |
| 35 | #include <linux/ata.h> |
| 36 | #include <linux/workqueue.h> |
| 37 | #include <scsi/scsi_host.h> |
| 38 | #include <linux/acpi.h> |
| 39 | |
| 40 | /* |
| 41 | * Define if arch has non-standard setup. This is a _PCI_ standard |
| 42 | * not a legacy or ISA standard. |
| 43 | */ |
| 44 | #ifdef CONFIG_ATA_NONSTANDARD |
| 45 | #include <asm/libata-portmap.h> |
| 46 | #else |
| 47 | #include <asm-generic/libata-portmap.h> |
| 48 | #endif |
| 49 | |
| 50 | /* |
| 51 | * compile-time options: to be removed as soon as all the drivers are |
| 52 | * converted to the new debugging mechanism |
| 53 | */ |
| 54 | #undef ATA_DEBUG /* debugging output */ |
| 55 | #undef ATA_VERBOSE_DEBUG /* yet more debugging output */ |
| 56 | #undef ATA_IRQ_TRAP /* define to ack screaming irqs */ |
| 57 | #undef ATA_NDEBUG /* define to disable quick runtime checks */ |
| 58 | |
| 59 | |
| 60 | /* note: prints function name for you */ |
| 61 | #ifdef ATA_DEBUG |
| 62 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
| 63 | #ifdef ATA_VERBOSE_DEBUG |
| 64 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
| 65 | #else |
| 66 | #define VPRINTK(fmt, args...) |
| 67 | #endif /* ATA_VERBOSE_DEBUG */ |
| 68 | #else |
| 69 | #define DPRINTK(fmt, args...) |
| 70 | #define VPRINTK(fmt, args...) |
| 71 | #endif /* ATA_DEBUG */ |
| 72 | |
| 73 | #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) |
| 74 | |
| 75 | /* NEW: debug levels */ |
| 76 | #define HAVE_LIBATA_MSG 1 |
| 77 | |
| 78 | enum { |
| 79 | ATA_MSG_DRV = 0x0001, |
| 80 | ATA_MSG_INFO = 0x0002, |
| 81 | ATA_MSG_PROBE = 0x0004, |
| 82 | ATA_MSG_WARN = 0x0008, |
| 83 | ATA_MSG_MALLOC = 0x0010, |
| 84 | ATA_MSG_CTL = 0x0020, |
| 85 | ATA_MSG_INTR = 0x0040, |
| 86 | ATA_MSG_ERR = 0x0080, |
| 87 | }; |
| 88 | |
| 89 | #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV) |
| 90 | #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO) |
| 91 | #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE) |
| 92 | #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN) |
| 93 | #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC) |
| 94 | #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL) |
| 95 | #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR) |
| 96 | #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR) |
| 97 | |
| 98 | static inline u32 ata_msg_init(int dval, int default_msg_enable_bits) |
| 99 | { |
| 100 | if (dval < 0 || dval >= (sizeof(u32) * 8)) |
| 101 | return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */ |
| 102 | if (!dval) |
| 103 | return 0; |
| 104 | return (1 << dval) - 1; |
| 105 | } |
| 106 | |
| 107 | /* defines only for the constants which don't work well as enums */ |
| 108 | #define ATA_TAG_POISON 0xfafbfcfdU |
| 109 | |
| 110 | /* move to PCI layer? */ |
| 111 | static inline struct device *pci_dev_to_dev(struct pci_dev *pdev) |
| 112 | { |
| 113 | return &pdev->dev; |
| 114 | } |
| 115 | |
| 116 | enum { |
| 117 | /* various global constants */ |
| 118 | LIBATA_MAX_PRD = ATA_MAX_PRD / 2, |
| 119 | LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */ |
| 120 | ATA_MAX_PORTS = 8, |
| 121 | ATA_DEF_QUEUE = 1, |
| 122 | /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */ |
| 123 | ATA_MAX_QUEUE = 32, |
| 124 | ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1, |
| 125 | ATA_MAX_BUS = 2, |
| 126 | ATA_DEF_BUSY_WAIT = 10000, |
| 127 | ATA_SHORT_PAUSE = (HZ >> 6) + 1, |
| 128 | |
| 129 | ATA_SHT_EMULATED = 1, |
| 130 | ATA_SHT_CMD_PER_LUN = 1, |
| 131 | ATA_SHT_THIS_ID = -1, |
| 132 | ATA_SHT_USE_CLUSTERING = 1, |
| 133 | |
| 134 | /* struct ata_device stuff */ |
| 135 | ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */ |
| 136 | ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */ |
| 137 | ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */ |
| 138 | ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */ |
| 139 | ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */ |
| 140 | ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */ |
| 141 | ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */ |
| 142 | ATA_DFLAG_CFG_MASK = (1 << 8) - 1, |
| 143 | |
| 144 | ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */ |
| 145 | ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */ |
| 146 | ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */ |
| 147 | ATA_DFLAG_INIT_MASK = (1 << 16) - 1, |
| 148 | |
| 149 | ATA_DFLAG_DETACH = (1 << 16), |
| 150 | ATA_DFLAG_DETACHED = (1 << 17), |
| 151 | |
| 152 | ATA_DEV_UNKNOWN = 0, /* unknown device */ |
| 153 | ATA_DEV_ATA = 1, /* ATA device */ |
| 154 | ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */ |
| 155 | ATA_DEV_ATAPI = 3, /* ATAPI device */ |
| 156 | ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */ |
| 157 | ATA_DEV_NONE = 5, /* no device */ |
| 158 | |
| 159 | /* struct ata_link flags */ |
| 160 | ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */ |
| 161 | ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H |
| 162 | * Register FIS clearing BSY */ |
| 163 | |
| 164 | /* struct ata_port flags */ |
| 165 | ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ |
| 166 | /* (doesn't imply presence) */ |
| 167 | ATA_FLAG_SATA = (1 << 1), |
| 168 | ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */ |
| 169 | ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */ |
| 170 | ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */ |
| 171 | ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */ |
| 172 | ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */ |
| 173 | ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */ |
| 174 | ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */ |
| 175 | ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD |
| 176 | * doesn't handle PIO interrupts */ |
| 177 | ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */ |
| 178 | ATA_FLAG_DEBUGMSG = (1 << 13), |
| 179 | ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */ |
| 180 | ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */ |
| 181 | ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */ |
| 182 | |
| 183 | /* The following flag belongs to ap->pflags but is kept in |
| 184 | * ap->flags because it's referenced in many LLDs and will be |
| 185 | * removed in not-too-distant future. |
| 186 | */ |
| 187 | ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */ |
| 188 | |
| 189 | /* bits 24:31 of ap->flags are reserved for LLD specific flags */ |
| 190 | |
| 191 | /* struct ata_port pflags */ |
| 192 | ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */ |
| 193 | ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */ |
| 194 | ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */ |
| 195 | ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */ |
| 196 | ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */ |
| 197 | ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */ |
| 198 | ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */ |
| 199 | ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */ |
| 200 | |
| 201 | ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ |
| 202 | ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ |
| 203 | ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */ |
| 204 | |
| 205 | /* struct ata_queued_cmd flags */ |
| 206 | ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */ |
| 207 | ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */ |
| 208 | ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */ |
| 209 | ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE, |
| 210 | ATA_QCFLAG_IO = (1 << 3), /* standard IO command */ |
| 211 | ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */ |
| 212 | |
| 213 | ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */ |
| 214 | ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */ |
| 215 | ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */ |
| 216 | |
| 217 | /* host set flags */ |
| 218 | ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */ |
| 219 | ATA_HOST_STARTED = (1 << 1), /* Host started */ |
| 220 | |
| 221 | /* bits 24:31 of host->flags are reserved for LLD specific flags */ |
| 222 | |
| 223 | /* various lengths of time */ |
| 224 | ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */ |
| 225 | ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */ |
| 226 | ATA_TMOUT_INTERNAL = 30 * HZ, |
| 227 | ATA_TMOUT_INTERNAL_QUICK = 5 * HZ, |
| 228 | |
| 229 | /* ATA bus states */ |
| 230 | BUS_UNKNOWN = 0, |
| 231 | BUS_DMA = 1, |
| 232 | BUS_IDLE = 2, |
| 233 | BUS_NOINTR = 3, |
| 234 | BUS_NODATA = 4, |
| 235 | BUS_TIMER = 5, |
| 236 | BUS_PIO = 6, |
| 237 | BUS_EDD = 7, |
| 238 | BUS_IDENTIFY = 8, |
| 239 | BUS_PACKET = 9, |
| 240 | |
| 241 | /* SATA port states */ |
| 242 | PORT_UNKNOWN = 0, |
| 243 | PORT_ENABLED = 1, |
| 244 | PORT_DISABLED = 2, |
| 245 | |
| 246 | /* encoding various smaller bitmaps into a single |
| 247 | * unsigned int bitmap |
| 248 | */ |
| 249 | ATA_BITS_PIO = 7, |
| 250 | ATA_BITS_MWDMA = 5, |
| 251 | ATA_BITS_UDMA = 8, |
| 252 | |
| 253 | ATA_SHIFT_PIO = 0, |
| 254 | ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO, |
| 255 | ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA, |
| 256 | |
| 257 | ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO, |
| 258 | ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA, |
| 259 | ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA, |
| 260 | |
| 261 | /* size of buffer to pad xfers ending on unaligned boundaries */ |
| 262 | ATA_DMA_PAD_SZ = 4, |
| 263 | ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, |
| 264 | |
| 265 | /* ering size */ |
| 266 | ATA_ERING_SIZE = 32, |
| 267 | |
| 268 | /* desc_len for ata_eh_info and context */ |
| 269 | ATA_EH_DESC_LEN = 80, |
| 270 | |
| 271 | /* reset / recovery action types */ |
| 272 | ATA_EH_REVALIDATE = (1 << 0), |
| 273 | ATA_EH_SOFTRESET = (1 << 1), |
| 274 | ATA_EH_HARDRESET = (1 << 2), |
| 275 | |
| 276 | ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET, |
| 277 | ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE, |
| 278 | |
| 279 | /* ata_eh_info->flags */ |
| 280 | ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */ |
| 281 | ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */ |
| 282 | ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */ |
| 283 | ATA_EHI_QUIET = (1 << 3), /* be quiet */ |
| 284 | |
| 285 | ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */ |
| 286 | ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */ |
| 287 | ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */ |
| 288 | ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */ |
| 289 | ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */ |
| 290 | |
| 291 | ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET, |
| 292 | ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK, |
| 293 | |
| 294 | /* max repeat if error condition is still set after ->error_handler */ |
| 295 | ATA_EH_MAX_REPEAT = 5, |
| 296 | |
| 297 | /* how hard are we gonna try to probe/recover devices */ |
| 298 | ATA_PROBE_MAX_TRIES = 3, |
| 299 | ATA_EH_DEV_TRIES = 3, |
| 300 | |
| 301 | /* Horkage types. May be set by libata or controller on drives |
| 302 | (some horkage may be drive/controller pair dependant */ |
| 303 | |
| 304 | ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */ |
| 305 | ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */ |
| 306 | ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */ |
| 307 | ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */ |
| 308 | ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */ |
| 309 | }; |
| 310 | |
| 311 | enum hsm_task_states { |
| 312 | HSM_ST_IDLE, /* no command on going */ |
| 313 | HSM_ST_FIRST, /* (waiting the device to) |
| 314 | write CDB or first data block */ |
| 315 | HSM_ST, /* (waiting the device to) transfer data */ |
| 316 | HSM_ST_LAST, /* (waiting the device to) complete command */ |
| 317 | HSM_ST_ERR, /* error */ |
| 318 | }; |
| 319 | |
| 320 | enum ata_completion_errors { |
| 321 | AC_ERR_DEV = (1 << 0), /* device reported error */ |
| 322 | AC_ERR_HSM = (1 << 1), /* host state machine violation */ |
| 323 | AC_ERR_TIMEOUT = (1 << 2), /* timeout */ |
| 324 | AC_ERR_MEDIA = (1 << 3), /* media error */ |
| 325 | AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */ |
| 326 | AC_ERR_HOST_BUS = (1 << 5), /* host bus error */ |
| 327 | AC_ERR_SYSTEM = (1 << 6), /* system error */ |
| 328 | AC_ERR_INVALID = (1 << 7), /* invalid argument */ |
| 329 | AC_ERR_OTHER = (1 << 8), /* unknown */ |
| 330 | AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */ |
| 331 | AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */ |
| 332 | }; |
| 333 | |
| 334 | /* forward declarations */ |
| 335 | struct scsi_device; |
| 336 | struct ata_port_operations; |
| 337 | struct ata_port; |
| 338 | struct ata_link; |
| 339 | struct ata_queued_cmd; |
| 340 | |
| 341 | /* typedefs */ |
| 342 | typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc); |
| 343 | typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline); |
| 344 | typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes, |
| 345 | unsigned long deadline); |
| 346 | typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes); |
| 347 | |
| 348 | struct ata_ioports { |
| 349 | void __iomem *cmd_addr; |
| 350 | void __iomem *data_addr; |
| 351 | void __iomem *error_addr; |
| 352 | void __iomem *feature_addr; |
| 353 | void __iomem *nsect_addr; |
| 354 | void __iomem *lbal_addr; |
| 355 | void __iomem *lbam_addr; |
| 356 | void __iomem *lbah_addr; |
| 357 | void __iomem *device_addr; |
| 358 | void __iomem *status_addr; |
| 359 | void __iomem *command_addr; |
| 360 | void __iomem *altstatus_addr; |
| 361 | void __iomem *ctl_addr; |
| 362 | void __iomem *bmdma_addr; |
| 363 | void __iomem *scr_addr; |
| 364 | }; |
| 365 | |
| 366 | struct ata_host { |
| 367 | spinlock_t lock; |
| 368 | struct device *dev; |
| 369 | unsigned long irq; |
| 370 | unsigned long irq2; |
| 371 | void __iomem * const *iomap; |
| 372 | unsigned int n_ports; |
| 373 | void *private_data; |
| 374 | const struct ata_port_operations *ops; |
| 375 | unsigned long flags; |
| 376 | #ifdef CONFIG_ATA_ACPI |
| 377 | acpi_handle acpi_handle; |
| 378 | #endif |
| 379 | struct ata_port *simplex_claimed; /* channel owning the DMA */ |
| 380 | struct ata_port *ports[0]; |
| 381 | }; |
| 382 | |
| 383 | struct ata_queued_cmd { |
| 384 | struct ata_port *ap; |
| 385 | struct ata_device *dev; |
| 386 | |
| 387 | struct scsi_cmnd *scsicmd; |
| 388 | void (*scsidone)(struct scsi_cmnd *); |
| 389 | |
| 390 | struct ata_taskfile tf; |
| 391 | u8 cdb[ATAPI_CDB_LEN]; |
| 392 | |
| 393 | unsigned long flags; /* ATA_QCFLAG_xxx */ |
| 394 | unsigned int tag; |
| 395 | unsigned int n_elem; |
| 396 | unsigned int orig_n_elem; |
| 397 | |
| 398 | int dma_dir; |
| 399 | |
| 400 | unsigned int pad_len; |
| 401 | unsigned int sect_size; |
| 402 | |
| 403 | unsigned int nbytes; |
| 404 | unsigned int curbytes; |
| 405 | |
| 406 | unsigned int cursg; |
| 407 | unsigned int cursg_ofs; |
| 408 | |
| 409 | struct scatterlist sgent; |
| 410 | struct scatterlist pad_sgent; |
| 411 | void *buf_virt; |
| 412 | |
| 413 | /* DO NOT iterate over __sg manually, use ata_for_each_sg() */ |
| 414 | struct scatterlist *__sg; |
| 415 | |
| 416 | unsigned int err_mask; |
| 417 | struct ata_taskfile result_tf; |
| 418 | ata_qc_cb_t complete_fn; |
| 419 | |
| 420 | void *private_data; |
| 421 | void *lldd_task; |
| 422 | }; |
| 423 | |
| 424 | struct ata_port_stats { |
| 425 | unsigned long unhandled_irq; |
| 426 | unsigned long idle_irq; |
| 427 | unsigned long rw_reqbuf; |
| 428 | }; |
| 429 | |
| 430 | struct ata_ering_entry { |
| 431 | int is_io; |
| 432 | unsigned int err_mask; |
| 433 | u64 timestamp; |
| 434 | }; |
| 435 | |
| 436 | struct ata_ering { |
| 437 | int cursor; |
| 438 | struct ata_ering_entry ring[ATA_ERING_SIZE]; |
| 439 | }; |
| 440 | |
| 441 | struct ata_device { |
| 442 | struct ata_link *link; |
| 443 | unsigned int devno; /* 0 or 1 */ |
| 444 | unsigned long flags; /* ATA_DFLAG_xxx */ |
| 445 | unsigned int horkage; /* List of broken features */ |
| 446 | struct scsi_device *sdev; /* attached SCSI device */ |
| 447 | #ifdef CONFIG_ATA_ACPI |
| 448 | acpi_handle acpi_handle; |
| 449 | #endif |
| 450 | /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */ |
| 451 | u64 n_sectors; /* size of device, if ATA */ |
| 452 | unsigned int class; /* ATA_DEV_xxx */ |
| 453 | u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ |
| 454 | u8 pio_mode; |
| 455 | u8 dma_mode; |
| 456 | u8 xfer_mode; |
| 457 | unsigned int xfer_shift; /* ATA_SHIFT_xxx */ |
| 458 | |
| 459 | unsigned int multi_count; /* sectors count for |
| 460 | READ/WRITE MULTIPLE */ |
| 461 | unsigned int max_sectors; /* per-device max sectors */ |
| 462 | unsigned int cdb_len; |
| 463 | |
| 464 | /* per-dev xfer mask */ |
| 465 | unsigned int pio_mask; |
| 466 | unsigned int mwdma_mask; |
| 467 | unsigned int udma_mask; |
| 468 | |
| 469 | /* for CHS addressing */ |
| 470 | u16 cylinders; /* Number of cylinders */ |
| 471 | u16 heads; /* Number of heads */ |
| 472 | u16 sectors; /* Number of sectors per track */ |
| 473 | |
| 474 | /* error history */ |
| 475 | struct ata_ering ering; |
| 476 | int spdn_cnt; |
| 477 | }; |
| 478 | |
| 479 | /* Offset into struct ata_device. Fields above it are maintained |
| 480 | * acress device init. Fields below are zeroed. |
| 481 | */ |
| 482 | #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors) |
| 483 | |
| 484 | struct ata_eh_info { |
| 485 | struct ata_device *dev; /* offending device */ |
| 486 | u32 serror; /* SError from LLDD */ |
| 487 | unsigned int err_mask; /* port-wide err_mask */ |
| 488 | unsigned int action; /* ATA_EH_* action mask */ |
| 489 | unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */ |
| 490 | unsigned int flags; /* ATA_EHI_* flags */ |
| 491 | |
| 492 | unsigned int probe_mask; |
| 493 | |
| 494 | char desc[ATA_EH_DESC_LEN]; |
| 495 | int desc_len; |
| 496 | }; |
| 497 | |
| 498 | struct ata_eh_context { |
| 499 | struct ata_eh_info i; |
| 500 | int tries[ATA_MAX_DEVICES]; |
| 501 | unsigned int classes[ATA_MAX_DEVICES]; |
| 502 | unsigned int did_probe_mask; |
| 503 | }; |
| 504 | |
| 505 | struct ata_acpi_drive |
| 506 | { |
| 507 | u32 pio; |
| 508 | u32 dma; |
| 509 | } __packed; |
| 510 | |
| 511 | struct ata_acpi_gtm { |
| 512 | struct ata_acpi_drive drive[2]; |
| 513 | u32 flags; |
| 514 | } __packed; |
| 515 | |
| 516 | struct ata_link { |
| 517 | struct ata_port *ap; |
| 518 | |
| 519 | unsigned int active_tag; /* active tag on this link */ |
| 520 | u32 sactive; /* active NCQ commands */ |
| 521 | |
| 522 | unsigned int flags; /* ATA_LFLAG_xxx */ |
| 523 | |
| 524 | unsigned int hw_sata_spd_limit; |
| 525 | unsigned int sata_spd_limit; |
| 526 | unsigned int sata_spd; /* current SATA PHY speed */ |
| 527 | |
| 528 | /* record runtime error info, protected by host_set lock */ |
| 529 | struct ata_eh_info eh_info; |
| 530 | /* EH context */ |
| 531 | struct ata_eh_context eh_context; |
| 532 | |
| 533 | struct ata_device device[ATA_MAX_DEVICES]; |
| 534 | }; |
| 535 | |
| 536 | struct ata_port { |
| 537 | struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ |
| 538 | const struct ata_port_operations *ops; |
| 539 | spinlock_t *lock; |
| 540 | unsigned long flags; /* ATA_FLAG_xxx */ |
| 541 | unsigned int pflags; /* ATA_PFLAG_xxx */ |
| 542 | unsigned int print_id; /* user visible unique port ID */ |
| 543 | unsigned int port_no; /* 0 based port no. inside the host */ |
| 544 | |
| 545 | struct ata_prd *prd; /* our SG list */ |
| 546 | dma_addr_t prd_dma; /* and its DMA mapping */ |
| 547 | |
| 548 | void *pad; /* array of DMA pad buffers */ |
| 549 | dma_addr_t pad_dma; |
| 550 | |
| 551 | struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */ |
| 552 | |
| 553 | u8 ctl; /* cache of ATA control register */ |
| 554 | u8 last_ctl; /* Cache last written value */ |
| 555 | unsigned int pio_mask; |
| 556 | unsigned int mwdma_mask; |
| 557 | unsigned int udma_mask; |
| 558 | unsigned int cbl; /* cable type; ATA_CBL_xxx */ |
| 559 | |
| 560 | struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; |
| 561 | unsigned long qc_allocated; |
| 562 | unsigned int qc_active; |
| 563 | |
| 564 | struct ata_link link; /* host default link */ |
| 565 | |
| 566 | struct ata_port_stats stats; |
| 567 | struct ata_host *host; |
| 568 | struct device *dev; |
| 569 | |
| 570 | void *port_task_data; |
| 571 | struct delayed_work port_task; |
| 572 | struct delayed_work hotplug_task; |
| 573 | struct work_struct scsi_rescan_task; |
| 574 | |
| 575 | unsigned int hsm_task_state; |
| 576 | |
| 577 | u32 msg_enable; |
| 578 | struct list_head eh_done_q; |
| 579 | wait_queue_head_t eh_wait_q; |
| 580 | |
| 581 | pm_message_t pm_mesg; |
| 582 | int *pm_result; |
| 583 | |
| 584 | struct timer_list fastdrain_timer; |
| 585 | unsigned long fastdrain_cnt; |
| 586 | |
| 587 | void *private_data; |
| 588 | |
| 589 | #ifdef CONFIG_ATA_ACPI |
| 590 | acpi_handle acpi_handle; |
| 591 | struct ata_acpi_gtm acpi_gtm; |
| 592 | #endif |
| 593 | u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */ |
| 594 | }; |
| 595 | |
| 596 | struct ata_port_operations { |
| 597 | void (*port_disable) (struct ata_port *); |
| 598 | |
| 599 | void (*dev_config) (struct ata_device *); |
| 600 | |
| 601 | void (*set_piomode) (struct ata_port *, struct ata_device *); |
| 602 | void (*set_dmamode) (struct ata_port *, struct ata_device *); |
| 603 | unsigned long (*mode_filter) (struct ata_device *, unsigned long); |
| 604 | |
| 605 | void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf); |
| 606 | void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf); |
| 607 | |
| 608 | void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf); |
| 609 | u8 (*check_status)(struct ata_port *ap); |
| 610 | u8 (*check_altstatus)(struct ata_port *ap); |
| 611 | void (*dev_select)(struct ata_port *ap, unsigned int device); |
| 612 | |
| 613 | void (*phy_reset) (struct ata_port *ap); /* obsolete */ |
| 614 | int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev); |
| 615 | |
| 616 | int (*cable_detect) (struct ata_port *ap); |
| 617 | |
| 618 | int (*check_atapi_dma) (struct ata_queued_cmd *qc); |
| 619 | |
| 620 | void (*bmdma_setup) (struct ata_queued_cmd *qc); |
| 621 | void (*bmdma_start) (struct ata_queued_cmd *qc); |
| 622 | |
| 623 | void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int); |
| 624 | |
| 625 | void (*qc_prep) (struct ata_queued_cmd *qc); |
| 626 | unsigned int (*qc_issue) (struct ata_queued_cmd *qc); |
| 627 | |
| 628 | /* Error handlers. ->error_handler overrides ->eng_timeout and |
| 629 | * indicates that new-style EH is in place. |
| 630 | */ |
| 631 | void (*eng_timeout) (struct ata_port *ap); /* obsolete */ |
| 632 | |
| 633 | void (*freeze) (struct ata_port *ap); |
| 634 | void (*thaw) (struct ata_port *ap); |
| 635 | void (*error_handler) (struct ata_port *ap); |
| 636 | void (*post_internal_cmd) (struct ata_queued_cmd *qc); |
| 637 | |
| 638 | irq_handler_t irq_handler; |
| 639 | void (*irq_clear) (struct ata_port *); |
| 640 | u8 (*irq_on) (struct ata_port *); |
| 641 | u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq); |
| 642 | |
| 643 | int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val); |
| 644 | int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val); |
| 645 | |
| 646 | int (*port_suspend) (struct ata_port *ap, pm_message_t mesg); |
| 647 | int (*port_resume) (struct ata_port *ap); |
| 648 | |
| 649 | int (*port_start) (struct ata_port *ap); |
| 650 | void (*port_stop) (struct ata_port *ap); |
| 651 | |
| 652 | void (*host_stop) (struct ata_host *host); |
| 653 | |
| 654 | void (*bmdma_stop) (struct ata_queued_cmd *qc); |
| 655 | u8 (*bmdma_status) (struct ata_port *ap); |
| 656 | }; |
| 657 | |
| 658 | struct ata_port_info { |
| 659 | struct scsi_host_template *sht; |
| 660 | unsigned long flags; |
| 661 | unsigned long link_flags; |
| 662 | unsigned long pio_mask; |
| 663 | unsigned long mwdma_mask; |
| 664 | unsigned long udma_mask; |
| 665 | const struct ata_port_operations *port_ops; |
| 666 | irq_handler_t irq_handler; |
| 667 | void *private_data; |
| 668 | }; |
| 669 | |
| 670 | struct ata_timing { |
| 671 | unsigned short mode; /* ATA mode */ |
| 672 | unsigned short setup; /* t1 */ |
| 673 | unsigned short act8b; /* t2 for 8-bit I/O */ |
| 674 | unsigned short rec8b; /* t2i for 8-bit I/O */ |
| 675 | unsigned short cyc8b; /* t0 for 8-bit I/O */ |
| 676 | unsigned short active; /* t2 or tD */ |
| 677 | unsigned short recover; /* t2i or tK */ |
| 678 | unsigned short cycle; /* t0 */ |
| 679 | unsigned short udma; /* t2CYCTYP/2 */ |
| 680 | }; |
| 681 | |
| 682 | #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin) |
| 683 | |
| 684 | extern const unsigned long sata_deb_timing_normal[]; |
| 685 | extern const unsigned long sata_deb_timing_hotplug[]; |
| 686 | extern const unsigned long sata_deb_timing_long[]; |
| 687 | |
| 688 | extern const struct ata_port_operations ata_dummy_port_ops; |
| 689 | extern const struct ata_port_info ata_dummy_port_info; |
| 690 | |
| 691 | static inline const unsigned long * |
| 692 | sata_ehc_deb_timing(struct ata_eh_context *ehc) |
| 693 | { |
| 694 | if (ehc->i.flags & ATA_EHI_HOTPLUGGED) |
| 695 | return sata_deb_timing_hotplug; |
| 696 | else |
| 697 | return sata_deb_timing_normal; |
| 698 | } |
| 699 | |
| 700 | static inline int ata_port_is_dummy(struct ata_port *ap) |
| 701 | { |
| 702 | return ap->ops == &ata_dummy_port_ops; |
| 703 | } |
| 704 | |
| 705 | extern void sata_print_link_status(struct ata_link *link); |
| 706 | extern void ata_port_probe(struct ata_port *); |
| 707 | extern void __sata_phy_reset(struct ata_port *ap); |
| 708 | extern void sata_phy_reset(struct ata_port *ap); |
| 709 | extern void ata_bus_reset(struct ata_port *ap); |
| 710 | extern int sata_set_spd(struct ata_link *link); |
| 711 | extern int sata_link_debounce(struct ata_link *link, |
| 712 | const unsigned long *params, unsigned long deadline); |
| 713 | extern int sata_link_resume(struct ata_link *link, const unsigned long *params, |
| 714 | unsigned long deadline); |
| 715 | extern int ata_std_prereset(struct ata_link *link, unsigned long deadline); |
| 716 | extern int ata_std_softreset(struct ata_link *link, unsigned int *classes, |
| 717 | unsigned long deadline); |
| 718 | extern int sata_link_hardreset(struct ata_link *link, |
| 719 | const unsigned long *timing, unsigned long deadline); |
| 720 | extern int sata_std_hardreset(struct ata_link *link, unsigned int *class, |
| 721 | unsigned long deadline); |
| 722 | extern void ata_std_postreset(struct ata_link *link, unsigned int *classes); |
| 723 | extern void ata_port_disable(struct ata_port *); |
| 724 | extern void ata_std_ports(struct ata_ioports *ioaddr); |
| 725 | #ifdef CONFIG_PCI |
| 726 | extern int ata_pci_init_one (struct pci_dev *pdev, |
| 727 | const struct ata_port_info * const * ppi); |
| 728 | extern void ata_pci_remove_one (struct pci_dev *pdev); |
| 729 | #ifdef CONFIG_PM |
| 730 | extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); |
| 731 | extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev); |
| 732 | extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); |
| 733 | extern int ata_pci_device_resume(struct pci_dev *pdev); |
| 734 | #endif |
| 735 | extern int ata_pci_clear_simplex(struct pci_dev *pdev); |
| 736 | #endif /* CONFIG_PCI */ |
| 737 | extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports); |
| 738 | extern struct ata_host *ata_host_alloc_pinfo(struct device *dev, |
| 739 | const struct ata_port_info * const * ppi, int n_ports); |
| 740 | extern int ata_host_start(struct ata_host *host); |
| 741 | extern int ata_host_register(struct ata_host *host, |
| 742 | struct scsi_host_template *sht); |
| 743 | extern int ata_host_activate(struct ata_host *host, int irq, |
| 744 | irq_handler_t irq_handler, unsigned long irq_flags, |
| 745 | struct scsi_host_template *sht); |
| 746 | extern void ata_host_detach(struct ata_host *host); |
| 747 | extern void ata_host_init(struct ata_host *, struct device *, |
| 748 | unsigned long, const struct ata_port_operations *); |
| 749 | extern int ata_scsi_detect(struct scsi_host_template *sht); |
| 750 | extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); |
| 751 | extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); |
| 752 | extern void ata_sas_port_destroy(struct ata_port *); |
| 753 | extern struct ata_port *ata_sas_port_alloc(struct ata_host *, |
| 754 | struct ata_port_info *, struct Scsi_Host *); |
| 755 | extern int ata_sas_port_init(struct ata_port *); |
| 756 | extern int ata_sas_port_start(struct ata_port *ap); |
| 757 | extern void ata_sas_port_stop(struct ata_port *ap); |
| 758 | extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *); |
| 759 | extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), |
| 760 | struct ata_port *ap); |
| 761 | extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc); |
| 762 | extern int sata_scr_valid(struct ata_link *link); |
| 763 | extern int sata_scr_read(struct ata_link *link, int reg, u32 *val); |
| 764 | extern int sata_scr_write(struct ata_link *link, int reg, u32 val); |
| 765 | extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val); |
| 766 | extern int ata_link_online(struct ata_link *link); |
| 767 | extern int ata_link_offline(struct ata_link *link); |
| 768 | #ifdef CONFIG_PM |
| 769 | extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg); |
| 770 | extern void ata_host_resume(struct ata_host *host); |
| 771 | #endif |
| 772 | extern int ata_ratelimit(void); |
| 773 | extern int ata_busy_sleep(struct ata_port *ap, |
| 774 | unsigned long timeout_pat, unsigned long timeout); |
| 775 | extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline); |
| 776 | extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn, |
| 777 | void *data, unsigned long delay); |
| 778 | extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val, |
| 779 | unsigned long interval_msec, |
| 780 | unsigned long timeout_msec); |
| 781 | extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *); |
| 782 | |
| 783 | /* |
| 784 | * Default driver ops implementations |
| 785 | */ |
| 786 | extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf); |
| 787 | extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf); |
| 788 | extern void ata_tf_to_fis(const struct ata_taskfile *tf, |
| 789 | u8 pmp, int is_cmd, u8 *fis); |
| 790 | extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf); |
| 791 | extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device); |
| 792 | extern void ata_std_dev_select (struct ata_port *ap, unsigned int device); |
| 793 | extern u8 ata_check_status(struct ata_port *ap); |
| 794 | extern u8 ata_altstatus(struct ata_port *ap); |
| 795 | extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf); |
| 796 | extern int ata_port_start (struct ata_port *ap); |
| 797 | extern int ata_sff_port_start (struct ata_port *ap); |
| 798 | extern irqreturn_t ata_interrupt (int irq, void *dev_instance); |
| 799 | extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf, |
| 800 | unsigned int buflen, int write_data); |
| 801 | extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf, |
| 802 | unsigned int buflen, int write_data); |
| 803 | extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc); |
| 804 | extern void ata_qc_prep(struct ata_queued_cmd *qc); |
| 805 | extern void ata_noop_qc_prep(struct ata_queued_cmd *qc); |
| 806 | extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc); |
| 807 | extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, |
| 808 | unsigned int buflen); |
| 809 | extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, |
| 810 | unsigned int n_elem); |
| 811 | extern unsigned int ata_dev_classify(const struct ata_taskfile *tf); |
| 812 | extern void ata_dev_disable(struct ata_device *adev); |
| 813 | extern void ata_id_string(const u16 *id, unsigned char *s, |
| 814 | unsigned int ofs, unsigned int len); |
| 815 | extern void ata_id_c_string(const u16 *id, unsigned char *s, |
| 816 | unsigned int ofs, unsigned int len); |
| 817 | extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown); |
| 818 | extern void ata_bmdma_setup (struct ata_queued_cmd *qc); |
| 819 | extern void ata_bmdma_start (struct ata_queued_cmd *qc); |
| 820 | extern void ata_bmdma_stop(struct ata_queued_cmd *qc); |
| 821 | extern u8 ata_bmdma_status(struct ata_port *ap); |
| 822 | extern void ata_bmdma_irq_clear(struct ata_port *ap); |
| 823 | extern void ata_bmdma_freeze(struct ata_port *ap); |
| 824 | extern void ata_bmdma_thaw(struct ata_port *ap); |
| 825 | extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 826 | ata_reset_fn_t softreset, |
| 827 | ata_reset_fn_t hardreset, |
| 828 | ata_postreset_fn_t postreset); |
| 829 | extern void ata_bmdma_error_handler(struct ata_port *ap); |
| 830 | extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc); |
| 831 | extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 832 | u8 status, int in_wq); |
| 833 | extern void ata_qc_complete(struct ata_queued_cmd *qc); |
| 834 | extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active, |
| 835 | void (*finish_qc)(struct ata_queued_cmd *)); |
| 836 | extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd, |
| 837 | void (*done)(struct scsi_cmnd *)); |
| 838 | extern int ata_std_bios_param(struct scsi_device *sdev, |
| 839 | struct block_device *bdev, |
| 840 | sector_t capacity, int geom[]); |
| 841 | extern int ata_scsi_slave_config(struct scsi_device *sdev); |
| 842 | extern void ata_scsi_slave_destroy(struct scsi_device *sdev); |
| 843 | extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, |
| 844 | int queue_depth); |
| 845 | extern struct ata_device *ata_dev_pair(struct ata_device *adev); |
| 846 | extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev); |
| 847 | extern u8 ata_irq_on(struct ata_port *ap); |
| 848 | extern u8 ata_dummy_irq_on(struct ata_port *ap); |
| 849 | extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq); |
| 850 | extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq); |
| 851 | |
| 852 | extern int ata_cable_40wire(struct ata_port *ap); |
| 853 | extern int ata_cable_80wire(struct ata_port *ap); |
| 854 | extern int ata_cable_sata(struct ata_port *ap); |
| 855 | extern int ata_cable_unknown(struct ata_port *ap); |
| 856 | |
| 857 | /* |
| 858 | * Timing helpers |
| 859 | */ |
| 860 | |
| 861 | extern unsigned int ata_pio_need_iordy(const struct ata_device *); |
| 862 | extern int ata_timing_compute(struct ata_device *, unsigned short, |
| 863 | struct ata_timing *, int, int); |
| 864 | extern void ata_timing_merge(const struct ata_timing *, |
| 865 | const struct ata_timing *, struct ata_timing *, |
| 866 | unsigned int); |
| 867 | |
| 868 | enum { |
| 869 | ATA_TIMING_SETUP = (1 << 0), |
| 870 | ATA_TIMING_ACT8B = (1 << 1), |
| 871 | ATA_TIMING_REC8B = (1 << 2), |
| 872 | ATA_TIMING_CYC8B = (1 << 3), |
| 873 | ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B | |
| 874 | ATA_TIMING_CYC8B, |
| 875 | ATA_TIMING_ACTIVE = (1 << 4), |
| 876 | ATA_TIMING_RECOVER = (1 << 5), |
| 877 | ATA_TIMING_CYCLE = (1 << 6), |
| 878 | ATA_TIMING_UDMA = (1 << 7), |
| 879 | ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B | |
| 880 | ATA_TIMING_REC8B | ATA_TIMING_CYC8B | |
| 881 | ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER | |
| 882 | ATA_TIMING_CYCLE | ATA_TIMING_UDMA, |
| 883 | }; |
| 884 | |
| 885 | |
| 886 | #ifdef CONFIG_PCI |
| 887 | struct pci_bits { |
| 888 | unsigned int reg; /* PCI config register to read */ |
| 889 | unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */ |
| 890 | unsigned long mask; |
| 891 | unsigned long val; |
| 892 | }; |
| 893 | |
| 894 | extern int ata_pci_init_sff_host(struct ata_host *host); |
| 895 | extern int ata_pci_init_bmdma(struct ata_host *host); |
| 896 | extern int ata_pci_prepare_sff_host(struct pci_dev *pdev, |
| 897 | const struct ata_port_info * const * ppi, |
| 898 | struct ata_host **r_host); |
| 899 | extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); |
| 900 | extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); |
| 901 | #endif /* CONFIG_PCI */ |
| 902 | |
| 903 | /* |
| 904 | * EH |
| 905 | */ |
| 906 | extern void ata_eng_timeout(struct ata_port *ap); |
| 907 | |
| 908 | extern void ata_port_schedule_eh(struct ata_port *ap); |
| 909 | extern int ata_port_abort(struct ata_port *ap); |
| 910 | extern int ata_port_freeze(struct ata_port *ap); |
| 911 | |
| 912 | extern void ata_eh_freeze_port(struct ata_port *ap); |
| 913 | extern void ata_eh_thaw_port(struct ata_port *ap); |
| 914 | |
| 915 | extern void ata_eh_qc_complete(struct ata_queued_cmd *qc); |
| 916 | extern void ata_eh_qc_retry(struct ata_queued_cmd *qc); |
| 917 | |
| 918 | extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, |
| 919 | ata_reset_fn_t softreset, ata_reset_fn_t hardreset, |
| 920 | ata_postreset_fn_t postreset); |
| 921 | |
| 922 | /* |
| 923 | * printk helpers |
| 924 | */ |
| 925 | #define ata_port_printk(ap, lv, fmt, args...) \ |
| 926 | printk(lv"ata%u: "fmt, (ap)->print_id , ##args) |
| 927 | |
| 928 | #define ata_link_printk(link, lv, fmt, args...) \ |
| 929 | printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args) |
| 930 | |
| 931 | #define ata_dev_printk(dev, lv, fmt, args...) \ |
| 932 | printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args) |
| 933 | |
| 934 | /* |
| 935 | * ata_eh_info helpers |
| 936 | */ |
| 937 | extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); |
| 938 | extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...); |
| 939 | extern void ata_ehi_clear_desc(struct ata_eh_info *ehi); |
| 940 | |
| 941 | static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi) |
| 942 | { |
| 943 | ehi->flags |= ATA_EHI_RESUME_LINK; |
| 944 | ehi->action |= ATA_EH_SOFTRESET; |
| 945 | ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; |
| 946 | } |
| 947 | |
| 948 | static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi) |
| 949 | { |
| 950 | ata_ehi_schedule_probe(ehi); |
| 951 | ehi->flags |= ATA_EHI_HOTPLUGGED; |
| 952 | ehi->err_mask |= AC_ERR_ATA_BUS; |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * qc helpers |
| 957 | */ |
| 958 | static inline int |
| 959 | ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc) |
| 960 | { |
| 961 | if (sg == &qc->pad_sgent) |
| 962 | return 1; |
| 963 | if (qc->pad_len) |
| 964 | return 0; |
| 965 | if (((sg - qc->__sg) + 1) == qc->n_elem) |
| 966 | return 1; |
| 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | static inline struct scatterlist * |
| 971 | ata_qc_first_sg(struct ata_queued_cmd *qc) |
| 972 | { |
| 973 | if (qc->n_elem) |
| 974 | return qc->__sg; |
| 975 | if (qc->pad_len) |
| 976 | return &qc->pad_sgent; |
| 977 | return NULL; |
| 978 | } |
| 979 | |
| 980 | static inline struct scatterlist * |
| 981 | ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc) |
| 982 | { |
| 983 | if (sg == &qc->pad_sgent) |
| 984 | return NULL; |
| 985 | if (++sg - qc->__sg < qc->n_elem) |
| 986 | return sg; |
| 987 | if (qc->pad_len) |
| 988 | return &qc->pad_sgent; |
| 989 | return NULL; |
| 990 | } |
| 991 | |
| 992 | #define ata_for_each_sg(sg, qc) \ |
| 993 | for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc)) |
| 994 | |
| 995 | static inline unsigned int ata_tag_valid(unsigned int tag) |
| 996 | { |
| 997 | return (tag < ATA_MAX_QUEUE) ? 1 : 0; |
| 998 | } |
| 999 | |
| 1000 | static inline unsigned int ata_tag_internal(unsigned int tag) |
| 1001 | { |
| 1002 | return tag == ATA_MAX_QUEUE - 1; |
| 1003 | } |
| 1004 | |
| 1005 | /* |
| 1006 | * device helpers |
| 1007 | */ |
| 1008 | static inline unsigned int ata_class_enabled(unsigned int class) |
| 1009 | { |
| 1010 | return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI; |
| 1011 | } |
| 1012 | |
| 1013 | static inline unsigned int ata_class_disabled(unsigned int class) |
| 1014 | { |
| 1015 | return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP; |
| 1016 | } |
| 1017 | |
| 1018 | static inline unsigned int ata_class_absent(unsigned int class) |
| 1019 | { |
| 1020 | return !ata_class_enabled(class) && !ata_class_disabled(class); |
| 1021 | } |
| 1022 | |
| 1023 | static inline unsigned int ata_dev_enabled(const struct ata_device *dev) |
| 1024 | { |
| 1025 | return ata_class_enabled(dev->class); |
| 1026 | } |
| 1027 | |
| 1028 | static inline unsigned int ata_dev_disabled(const struct ata_device *dev) |
| 1029 | { |
| 1030 | return ata_class_disabled(dev->class); |
| 1031 | } |
| 1032 | |
| 1033 | static inline unsigned int ata_dev_absent(const struct ata_device *dev) |
| 1034 | { |
| 1035 | return ata_class_absent(dev->class); |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * link helpers |
| 1040 | */ |
| 1041 | static inline int ata_link_max_devices(const struct ata_link *link) |
| 1042 | { |
| 1043 | if (link->ap->flags & ATA_FLAG_SLAVE_POSS) |
| 1044 | return 2; |
| 1045 | return 1; |
| 1046 | } |
| 1047 | |
| 1048 | #define ata_port_for_each_link(lk, ap) \ |
| 1049 | for ((lk) = &(ap)->link; (lk); (lk) = NULL) |
| 1050 | |
| 1051 | #define ata_link_for_each_dev(dev, link) \ |
| 1052 | for ((dev) = (link)->device; \ |
| 1053 | (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \ |
| 1054 | (dev)++) |
| 1055 | |
| 1056 | #define ata_link_for_each_dev_reverse(dev, link) \ |
| 1057 | for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \ |
| 1058 | (dev) >= (link)->device || ((dev) = NULL); (dev)--) |
| 1059 | |
| 1060 | static inline u8 ata_chk_status(struct ata_port *ap) |
| 1061 | { |
| 1062 | return ap->ops->check_status(ap); |
| 1063 | } |
| 1064 | |
| 1065 | /** |
| 1066 | * ata_ncq_enabled - Test whether NCQ is enabled |
| 1067 | * @dev: ATA device to test for |
| 1068 | * |
| 1069 | * LOCKING: |
| 1070 | * spin_lock_irqsave(host lock) |
| 1071 | * |
| 1072 | * RETURNS: |
| 1073 | * 1 if NCQ is enabled for @dev, 0 otherwise. |
| 1074 | */ |
| 1075 | static inline int ata_ncq_enabled(struct ata_device *dev) |
| 1076 | { |
| 1077 | return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF | |
| 1078 | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ; |
| 1079 | } |
| 1080 | |
| 1081 | /** |
| 1082 | * ata_pause - Flush writes and pause 400 nanoseconds. |
| 1083 | * @ap: Port to wait for. |
| 1084 | * |
| 1085 | * LOCKING: |
| 1086 | * Inherited from caller. |
| 1087 | */ |
| 1088 | |
| 1089 | static inline void ata_pause(struct ata_port *ap) |
| 1090 | { |
| 1091 | ata_altstatus(ap); |
| 1092 | ndelay(400); |
| 1093 | } |
| 1094 | |
| 1095 | |
| 1096 | /** |
| 1097 | * ata_busy_wait - Wait for a port status register |
| 1098 | * @ap: Port to wait for. |
| 1099 | * @bits: bits that must be clear |
| 1100 | * @max: number of 10uS waits to perform |
| 1101 | * |
| 1102 | * Waits up to max*10 microseconds for the selected bits in the port's |
| 1103 | * status register to be cleared. |
| 1104 | * Returns final value of status register. |
| 1105 | * |
| 1106 | * LOCKING: |
| 1107 | * Inherited from caller. |
| 1108 | */ |
| 1109 | |
| 1110 | static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits, |
| 1111 | unsigned int max) |
| 1112 | { |
| 1113 | u8 status; |
| 1114 | |
| 1115 | do { |
| 1116 | udelay(10); |
| 1117 | status = ata_chk_status(ap); |
| 1118 | max--; |
| 1119 | } while (status != 0xff && (status & bits) && (max > 0)); |
| 1120 | |
| 1121 | return status; |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | /** |
| 1126 | * ata_wait_idle - Wait for a port to be idle. |
| 1127 | * @ap: Port to wait for. |
| 1128 | * |
| 1129 | * Waits up to 10ms for port's BUSY and DRQ signals to clear. |
| 1130 | * Returns final value of status register. |
| 1131 | * |
| 1132 | * LOCKING: |
| 1133 | * Inherited from caller. |
| 1134 | */ |
| 1135 | |
| 1136 | static inline u8 ata_wait_idle(struct ata_port *ap) |
| 1137 | { |
| 1138 | u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); |
| 1139 | |
| 1140 | if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) |
| 1141 | DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n", |
| 1142 | status, ap->ioaddr.status_addr); |
| 1143 | |
| 1144 | return status; |
| 1145 | } |
| 1146 | |
| 1147 | static inline void ata_qc_set_polling(struct ata_queued_cmd *qc) |
| 1148 | { |
| 1149 | qc->tf.ctl |= ATA_NIEN; |
| 1150 | } |
| 1151 | |
| 1152 | static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap, |
| 1153 | unsigned int tag) |
| 1154 | { |
| 1155 | if (likely(ata_tag_valid(tag))) |
| 1156 | return &ap->qcmd[tag]; |
| 1157 | return NULL; |
| 1158 | } |
| 1159 | |
| 1160 | static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap, |
| 1161 | unsigned int tag) |
| 1162 | { |
| 1163 | struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag); |
| 1164 | |
| 1165 | if (unlikely(!qc) || !ap->ops->error_handler) |
| 1166 | return qc; |
| 1167 | |
| 1168 | if ((qc->flags & (ATA_QCFLAG_ACTIVE | |
| 1169 | ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE) |
| 1170 | return qc; |
| 1171 | |
| 1172 | return NULL; |
| 1173 | } |
| 1174 | |
| 1175 | static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) |
| 1176 | { |
| 1177 | memset(tf, 0, sizeof(*tf)); |
| 1178 | |
| 1179 | tf->ctl = dev->link->ap->ctl; |
| 1180 | if (dev->devno == 0) |
| 1181 | tf->device = ATA_DEVICE_OBS; |
| 1182 | else |
| 1183 | tf->device = ATA_DEVICE_OBS | ATA_DEV1; |
| 1184 | } |
| 1185 | |
| 1186 | static inline void ata_qc_reinit(struct ata_queued_cmd *qc) |
| 1187 | { |
| 1188 | qc->dma_dir = DMA_NONE; |
| 1189 | qc->__sg = NULL; |
| 1190 | qc->flags = 0; |
| 1191 | qc->cursg = qc->cursg_ofs = 0; |
| 1192 | qc->nbytes = qc->curbytes = 0; |
| 1193 | qc->n_elem = 0; |
| 1194 | qc->err_mask = 0; |
| 1195 | qc->pad_len = 0; |
| 1196 | qc->sect_size = ATA_SECT_SIZE; |
| 1197 | |
| 1198 | ata_tf_init(qc->dev, &qc->tf); |
| 1199 | |
| 1200 | /* init result_tf such that it indicates normal completion */ |
| 1201 | qc->result_tf.command = ATA_DRDY; |
| 1202 | qc->result_tf.feature = 0; |
| 1203 | } |
| 1204 | |
| 1205 | static inline int ata_try_flush_cache(const struct ata_device *dev) |
| 1206 | { |
| 1207 | return ata_id_wcache_enabled(dev->id) || |
| 1208 | ata_id_has_flush(dev->id) || |
| 1209 | ata_id_has_flush_ext(dev->id); |
| 1210 | } |
| 1211 | |
| 1212 | static inline unsigned int ac_err_mask(u8 status) |
| 1213 | { |
| 1214 | if (status & (ATA_BUSY | ATA_DRQ)) |
| 1215 | return AC_ERR_HSM; |
| 1216 | if (status & (ATA_ERR | ATA_DF)) |
| 1217 | return AC_ERR_DEV; |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | static inline unsigned int __ac_err_mask(u8 status) |
| 1222 | { |
| 1223 | unsigned int mask = ac_err_mask(status); |
| 1224 | if (mask == 0) |
| 1225 | return AC_ERR_OTHER; |
| 1226 | return mask; |
| 1227 | } |
| 1228 | |
| 1229 | static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev) |
| 1230 | { |
| 1231 | ap->pad_dma = 0; |
| 1232 | ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, |
| 1233 | &ap->pad_dma, GFP_KERNEL); |
| 1234 | return (ap->pad == NULL) ? -ENOMEM : 0; |
| 1235 | } |
| 1236 | |
| 1237 | static inline void ata_pad_free(struct ata_port *ap, struct device *dev) |
| 1238 | { |
| 1239 | dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma); |
| 1240 | } |
| 1241 | |
| 1242 | static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host) |
| 1243 | { |
| 1244 | return *(struct ata_port **)&host->hostdata[0]; |
| 1245 | } |
| 1246 | |
| 1247 | #endif /* __LINUX_LIBATA_H__ */ |