drivers/ata/libata.h

   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
  34 struct 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 */
  42 enum {
  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
  56 extern unsigned int ata_print_id;
  57 extern struct workqueue_struct *ata_aux_wq;
  58 extern int atapi_enabled;
  59 extern int atapi_dmadir;
  60 extern int atapi_passthru16;
  61 extern int libata_fua;
  62 extern int libata_noacpi;
  63 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
  64 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  65                            u64 block, u32 n_block, unsigned int tf_flags,
  66                            unsigned int tag);
  67 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
  68 extern void ata_dev_disable(struct ata_device *dev);
  69 extern void ata_port_flush_task(struct ata_port *ap);
  70 extern unsigned ata_exec_internal(struct ata_device *dev,
  71                                   struct ata_taskfile *tf, const u8 *cdb,
  72                                   int dma_dir, void *buf, unsigned int buflen,
  73                                   unsigned long timeout);
  74 extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  75                                      struct ata_taskfile *tf, const u8 *cdb,
  76                                      int dma_dir, struct scatterlist *sg,
  77                                      unsigned int n_elem, unsigned long timeout);
  78 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
  79 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
  80                            unsigned int flags, u16 *id);
  81 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
  82 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  83                               unsigned int readid_flags);
  84 extern int ata_dev_configure(struct ata_device *dev);
  85 extern int sata_down_spd_limit(struct ata_link *link);
  86 extern int sata_set_spd_needed(struct ata_link *link);
  87 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
  88 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
  89 extern void ata_sg_clean(struct ata_queued_cmd *qc);
  90 extern void ata_qc_free(struct ata_queued_cmd *qc);
  91 extern void ata_qc_issue(struct ata_queued_cmd *qc);
  92 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
  93 extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
  94 extern void ata_dev_select(struct ata_port *ap, unsigned int device,
  95                            unsigned int wait, unsigned int can_sleep);
  96 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
  97 extern int ata_flush_cache(struct ata_device *dev);
  98 extern void ata_dev_init(struct ata_device *dev);
  99 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
 100 extern int sata_link_init_spd(struct ata_link *link);
 101 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
 102 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 103 extern struct ata_port *ata_port_alloc(struct ata_host *host);
 104 extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy);
 105 extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm);
 106
 107 /* libata-acpi.c */
 108 #ifdef CONFIG_ATA_ACPI
 109 extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 110 extern void ata_acpi_associate(struct ata_host *host);
 111 extern void ata_acpi_dissociate(struct ata_host *host);
 112 extern int ata_acpi_on_suspend(struct ata_port *ap);
 113 extern void ata_acpi_on_resume(struct ata_port *ap);
 114 extern int ata_acpi_on_devcfg(struct ata_device *dev);
 115 extern void ata_acpi_on_disable(struct ata_device *dev);
 116 #else
 117 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 118 static inline void ata_acpi_associate(struct ata_host *host) { }
 119 static inline void ata_acpi_dissociate(struct ata_host *host) { }
 120 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 121 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
 122 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
 123 static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 124 #endif
 125
 126 /* libata-scsi.c */
 127 extern int ata_scsi_add_hosts(struct ata_host *host,
 128                               struct scsi_host_template *sht);
 129 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 130 extern int ata_scsi_offline_dev(struct ata_device *dev);
 131 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 132 extern void ata_scsi_hotplug(struct work_struct *work);
 133 extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
 134                                unsigned int buflen);
 135
 136 extern unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
 137                               unsigned int buflen);
 138
 139 extern unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
 140                               unsigned int buflen);
 141 extern unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
 142                               unsigned int buflen);
 143 extern unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
 144                             unsigned int buflen);
 145 extern unsigned int ata_scsiop_sync_cache(struct ata_scsi_args *args, u8 *rbuf,
 146                                   unsigned int buflen);
 147 extern unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
 148                                   unsigned int buflen);
 149 extern unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
 150                                 unsigned int buflen);
 151 extern unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
 152                                    unsigned int buflen);
 153 extern void ata_scsi_badcmd(struct scsi_cmnd *cmd,
 154                             void (*done)(struct scsi_cmnd *),
 155                             u8 asc, u8 ascq);
 156 extern void ata_scsi_set_sense(struct scsi_cmnd *cmd,
 157                                u8 sk, u8 asc, u8 ascq);
 158 extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
 159                         unsigned int (*actor) (struct ata_scsi_args *args,
 160                                            u8 *rbuf, unsigned int buflen));
 161 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 162 extern void ata_scsi_dev_rescan(struct work_struct *work);
 163 extern int ata_bus_probe(struct ata_port *ap);
 164
 165 /* libata-pmp.c */
 166 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
 167 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
 168 extern int sata_pmp_attach(struct ata_device *dev);
 169
 170 /* libata-eh.c */
 171 extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 172 extern void ata_scsi_error(struct Scsi_Host *host);
 173 extern void ata_port_wait_eh(struct ata_port *ap);
 174 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 175 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 176 extern void ata_eh_detach_dev(struct ata_device *dev);
 177 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 178                                unsigned int action);
 179 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 180                         unsigned int action);
 181 extern void ata_eh_autopsy(struct ata_port *ap);
 182 extern void ata_eh_report(struct ata_port *ap);
 183 extern int ata_eh_reset(struct ata_link *link, int classify,
 184                         ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 185                         ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
 186 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 187                           ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 188                           ata_postreset_fn_t postreset,
 189                           struct ata_link **r_failed_disk);
 190 extern void ata_eh_finish(struct ata_port *ap);
 191
 192 /* libata-sff.c */
 193 extern u8 ata_irq_on(struct ata_port *ap);
 194
 195
 196 #endif /* __LIBATA_H__ */