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 int atapi_passthru16;
  58 extern int libata_fua;
  59 extern int libata_noacpi;
  60 extern int libata_allow_tpm;
  61 extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
  62 extern void ata_force_cbl(struct ata_port *ap);
  63 extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
  64 extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
  65 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
  66 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  67                            u64 block, u32 n_block, unsigned int tf_flags,
  68                            unsigned int tag);
  69 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
  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_wait_ready(struct ata_link *link, unsigned long deadline,
  80                           int (*check_ready)(struct ata_link *link));
  81 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
  82                            unsigned int flags, u16 *id);
  83 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
  84 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  85                               unsigned int readid_flags);
  86 extern int ata_dev_configure(struct ata_device *dev);
  87 extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
  88 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
  89 extern unsigned int ata_dev_set_feature(struct ata_device *dev,
  90                                         u8 enable, u8 feature);
  91 extern void ata_sg_clean(struct ata_queued_cmd *qc);
  92 extern void ata_qc_free(struct ata_queued_cmd *qc);
  93 extern void ata_qc_issue(struct ata_queued_cmd *qc);
  94 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
  95 extern int atapi_check_dma(struct ata_queued_cmd *qc);
  96 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
  97 extern bool ata_phys_link_online(struct ata_link *link);
  98 extern bool ata_phys_link_offline(struct ata_link *link);
  99 extern void ata_dev_init(struct ata_device *dev);
 100 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
 101 extern int sata_link_init_spd(struct ata_link *link);
 102 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
 103 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 104 extern struct ata_port *ata_port_alloc(struct ata_host *host);
 105 extern const char *sata_spd_string(unsigned int spd);
 106 extern int ata_port_probe(struct ata_port *ap);
 107
 108 /* libata-acpi.c */
 109 #ifdef CONFIG_ATA_ACPI
 110 extern unsigned int ata_acpi_gtf_filter;
 111
 112 extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 113 extern void ata_acpi_associate(struct ata_host *host);
 114 extern void ata_acpi_dissociate(struct ata_host *host);
 115 extern int ata_acpi_on_suspend(struct ata_port *ap);
 116 extern void ata_acpi_on_resume(struct ata_port *ap);
 117 extern int ata_acpi_on_devcfg(struct ata_device *dev);
 118 extern void ata_acpi_on_disable(struct ata_device *dev);
 119 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
 120 #else
 121 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 122 static inline void ata_acpi_associate(struct ata_host *host) { }
 123 static inline void ata_acpi_dissociate(struct ata_host *host) { }
 124 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 125 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
 126 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
 127 static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 128 static inline void ata_acpi_set_state(struct ata_port *ap,
 129                                       pm_message_t state) { }
 130 #endif
 131
 132 /* libata-scsi.c */
 133 extern int ata_scsi_add_hosts(struct ata_host *host,
 134                               struct scsi_host_template *sht);
 135 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 136 extern int ata_scsi_offline_dev(struct ata_device *dev);
 137 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 138 extern void ata_scsi_hotplug(struct work_struct *work);
 139 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 140 extern void ata_scsi_dev_rescan(struct work_struct *work);
 141 extern int ata_bus_probe(struct ata_port *ap);
 142 extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 143                               unsigned int id, unsigned int lun);
 144
 145
 146 /* libata-eh.c */
 147 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
 148 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
 149 extern void ata_eh_acquire(struct ata_port *ap);
 150 extern void ata_eh_release(struct ata_port *ap);
 151 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 152 extern void ata_scsi_error(struct Scsi_Host *host);
 153 extern void ata_port_wait_eh(struct ata_port *ap);
 154 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 155 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 156 extern void ata_dev_disable(struct ata_device *dev);
 157 extern void ata_eh_detach_dev(struct ata_device *dev);
 158 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 159                                unsigned int action);
 160 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 161                         unsigned int action);
 162 extern void ata_eh_autopsy(struct ata_port *ap);
 163 const char *ata_get_cmd_descript(u8 command);
 164 extern void ata_eh_report(struct ata_port *ap);
 165 extern int ata_eh_reset(struct ata_link *link, int classify,
 166                         ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 167                         ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
 168 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 169 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 170                           ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 171                           ata_postreset_fn_t postreset,
 172                           struct ata_link **r_failed_disk);
 173 extern void ata_eh_finish(struct ata_port *ap);
 174 extern int ata_ering_map(struct ata_ering *ering,
 175                          int (*map_fn)(struct ata_ering_entry *, void *),
 176                          void *arg);
 177
 178 /* libata-pmp.c */
 179 #ifdef CONFIG_SATA_PMP
 180 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
 181 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
 182 extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 183                             unsigned hints);
 184 extern int sata_pmp_attach(struct ata_device *dev);
 185 #else /* CONFIG_SATA_PMP */
 186 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
 187 {
 188         return -EINVAL;
 189 }
 190
 191 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
 192 {
 193         return -EINVAL;
 194 }
 195
 196 static inline int sata_pmp_set_lpm(struct ata_link *link,
 197                                    enum ata_lpm_policy policy, unsigned hints)
 198 {
 199         return -EINVAL;
 200 }
 201
 202 static inline int sata_pmp_attach(struct ata_device *dev)
 203 {
 204         return -EINVAL;
 205 }
 206 #endif /* CONFIG_SATA_PMP */
 207
 208 /* libata-sff.c */
 209 #ifdef CONFIG_ATA_SFF
 210 extern void ata_sff_flush_pio_task(struct ata_port *ap);
 211 extern void ata_sff_port_init(struct ata_port *ap);
 212 extern int ata_sff_init(void);
 213 extern void ata_sff_exit(void);
 214 #else /* CONFIG_ATA_SFF */
 215 static inline void ata_sff_flush_pio_task(struct ata_port *ap)
 216 { }
 217 static inline void ata_sff_port_init(struct ata_port *ap)
 218 { }
 219 static inline int ata_sff_init(void)
 220 { return 0; }
 221 static inline void ata_sff_exit(void)
 222 { }
 223 #endif /* CONFIG_ATA_SFF */
 224
 225 #endif /* __LIBATA_H__ */