linux/drivers/ata/libata.h
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   1/*
   2 *  libata.h - helper library for ATA
   3 *
   4 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   5 *  Copyright 2003-2004 Jeff Garzik
   6 *
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; either version 2, or (at your option)
  11 *  any later version.
  12 *
  13 *  This program is distributed in the hope that it will be useful,
  14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *  GNU General Public License for more details.
  17 *
  18 *  You should have received a copy of the GNU General Public License
  19 *  along with this program; see the file COPYING.  If not, write to
  20 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  21 *
  22 *
  23 *  libata documentation is available via 'make {ps|pdf}docs',
  24 *  as Documentation/DocBook/libata.*
  25 *
  26 */
  27
  28#ifndef __LIBATA_H__
  29#define __LIBATA_H__
  30
  31#define DRV_NAME        "libata"
  32#define DRV_VERSION     "3.00"  /* must be exactly four chars */
  33
  34struct ata_scsi_args {
  35        struct ata_device       *dev;
  36        u16                     *id;
  37        struct scsi_cmnd        *cmd;
  38        void                    (*done)(struct scsi_cmnd *);
  39};
  40
  41/* libata-core.c */
  42enum {
  43        /* flags for ata_dev_read_id() */
  44        ATA_READID_POSTRESET    = (1 << 0), /* reading ID after reset */
  45
  46        /* selector for ata_down_xfermask_limit() */
  47        ATA_DNXFER_PIO          = 0,    /* speed down PIO */
  48        ATA_DNXFER_DMA          = 1,    /* speed down DMA */
  49        ATA_DNXFER_40C          = 2,    /* apply 40c cable limit */
  50        ATA_DNXFER_FORCE_PIO    = 3,    /* force PIO */
  51        ATA_DNXFER_FORCE_PIO0   = 4,    /* force PIO0 */
  52
  53        ATA_DNXFER_QUIET        = (1 << 31),
  54};
  55
  56extern atomic_t ata_print_id;
  57extern int atapi_passthru16;
  58extern int libata_fua;
  59extern int libata_noacpi;
  60extern int libata_allow_tpm;
  61extern struct device_type ata_port_type;
  62extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
  63extern void ata_force_cbl(struct ata_port *ap);
  64extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
  65extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
  66extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
  67extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  68                           u64 block, u32 n_block, unsigned int tf_flags,
  69                           unsigned int tag);
  70extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
  71extern unsigned ata_exec_internal(struct ata_device *dev,
  72                                  struct ata_taskfile *tf, const u8 *cdb,
  73                                  int dma_dir, void *buf, unsigned int buflen,
  74                                  unsigned long timeout);
  75extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  76                                     struct ata_taskfile *tf, const u8 *cdb,
  77                                     int dma_dir, struct scatterlist *sg,
  78                                     unsigned int n_elem, unsigned long timeout);
  79extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
  80extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
  81                          int (*check_ready)(struct ata_link *link));
  82extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
  83                           unsigned int flags, u16 *id);
  84extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
  85extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  86                              unsigned int readid_flags);
  87extern int ata_dev_configure(struct ata_device *dev);
  88extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
  89extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
  90extern unsigned int ata_dev_set_feature(struct ata_device *dev,
  91                                        u8 enable, u8 feature);
  92extern void ata_sg_clean(struct ata_queued_cmd *qc);
  93extern void ata_qc_free(struct ata_queued_cmd *qc);
  94extern void ata_qc_issue(struct ata_queued_cmd *qc);
  95extern void __ata_qc_complete(struct ata_queued_cmd *qc);
  96extern int atapi_check_dma(struct ata_queued_cmd *qc);
  97extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
  98extern bool ata_phys_link_online(struct ata_link *link);
  99extern bool ata_phys_link_offline(struct ata_link *link);
 100extern void ata_dev_init(struct ata_device *dev);
 101extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
 102extern int sata_link_init_spd(struct ata_link *link);
 103extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
 104extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 105extern struct ata_port *ata_port_alloc(struct ata_host *host);
 106extern const char *sata_spd_string(unsigned int spd);
 107extern int ata_port_probe(struct ata_port *ap);
 108extern void __ata_port_probe(struct ata_port *ap);
 109
 110/* libata-acpi.c */
 111#ifdef CONFIG_ATA_ACPI
 112extern unsigned int ata_acpi_gtf_filter;
 113
 114extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 115extern void ata_acpi_associate(struct ata_host *host);
 116extern void ata_acpi_dissociate(struct ata_host *host);
 117extern int ata_acpi_on_suspend(struct ata_port *ap);
 118extern void ata_acpi_on_resume(struct ata_port *ap);
 119extern int ata_acpi_on_devcfg(struct ata_device *dev);
 120extern void ata_acpi_on_disable(struct ata_device *dev);
 121extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
 122#else
 123static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 124static inline void ata_acpi_associate(struct ata_host *host) { }
 125static inline void ata_acpi_dissociate(struct ata_host *host) { }
 126static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 127static inline void ata_acpi_on_resume(struct ata_port *ap) { }
 128static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
 129static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 130static inline void ata_acpi_set_state(struct ata_port *ap,
 131                                      pm_message_t state) { }
 132#endif
 133
 134/* libata-scsi.c */
 135extern int ata_scsi_add_hosts(struct ata_host *host,
 136                              struct scsi_host_template *sht);
 137extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 138extern int ata_scsi_offline_dev(struct ata_device *dev);
 139extern void ata_scsi_media_change_notify(struct ata_device *dev);
 140extern void ata_scsi_hotplug(struct work_struct *work);
 141extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 142extern void ata_scsi_dev_rescan(struct work_struct *work);
 143extern int ata_bus_probe(struct ata_port *ap);
 144extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 145                              unsigned int id, unsigned int lun);
 146
 147
 148/* libata-eh.c */
 149extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
 150extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
 151extern void ata_eh_acquire(struct ata_port *ap);
 152extern void ata_eh_release(struct ata_port *ap);
 153extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 154extern void ata_scsi_error(struct Scsi_Host *host);
 155extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 156extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 157extern void ata_dev_disable(struct ata_device *dev);
 158extern void ata_eh_detach_dev(struct ata_device *dev);
 159extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 160                               unsigned int action);
 161extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 162                        unsigned int action);
 163extern void ata_eh_autopsy(struct ata_port *ap);
 164const char *ata_get_cmd_descript(u8 command);
 165extern void ata_eh_report(struct ata_port *ap);
 166extern int ata_eh_reset(struct ata_link *link, int classify,
 167                        ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 168                        ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
 169extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 170extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 171                          ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 172                          ata_postreset_fn_t postreset,
 173                          struct ata_link **r_failed_disk);
 174extern void ata_eh_finish(struct ata_port *ap);
 175extern int ata_ering_map(struct ata_ering *ering,
 176                         int (*map_fn)(struct ata_ering_entry *, void *),
 177                         void *arg);
 178
 179/* libata-pmp.c */
 180#ifdef CONFIG_SATA_PMP
 181extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
 182extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
 183extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 184                            unsigned hints);
 185extern int sata_pmp_attach(struct ata_device *dev);
 186#else /* CONFIG_SATA_PMP */
 187static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
 188{
 189        return -EINVAL;
 190}
 191
 192static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
 193{
 194        return -EINVAL;
 195}
 196
 197static inline int sata_pmp_set_lpm(struct ata_link *link,
 198                                   enum ata_lpm_policy policy, unsigned hints)
 199{
 200        return -EINVAL;
 201}
 202
 203static inline int sata_pmp_attach(struct ata_device *dev)
 204{
 205        return -EINVAL;
 206}
 207#endif /* CONFIG_SATA_PMP */
 208
 209/* libata-sff.c */
 210#ifdef CONFIG_ATA_SFF
 211extern void ata_sff_flush_pio_task(struct ata_port *ap);
 212extern void ata_sff_port_init(struct ata_port *ap);
 213extern int ata_sff_init(void);
 214extern void ata_sff_exit(void);
 215#else /* CONFIG_ATA_SFF */
 216static inline void ata_sff_flush_pio_task(struct ata_port *ap)
 217{ }
 218static inline void ata_sff_port_init(struct ata_port *ap)
 219{ }
 220static inline int ata_sff_init(void)
 221{ return 0; }
 222static inline void ata_sff_exit(void)
 223{ }
 224#endif /* CONFIG_ATA_SFF */
 225
 226#endif /* __LIBATA_H__ */
 227
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