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 /* libata-core.c */
  35 enum {
  36         /* flags for ata_dev_read_id() */
  37         ATA_READID_POSTRESET    = (1 << 0), /* reading ID after reset */
  38
  39         /* selector for ata_down_xfermask_limit() */
  40         ATA_DNXFER_PIO          = 0,    /* speed down PIO */
  41         ATA_DNXFER_DMA          = 1,    /* speed down DMA */
  42         ATA_DNXFER_40C          = 2,    /* apply 40c cable limit */
  43         ATA_DNXFER_FORCE_PIO    = 3,    /* force PIO */
  44         ATA_DNXFER_FORCE_PIO0   = 4,    /* force PIO0 */
  45
  46         ATA_DNXFER_QUIET        = (1 << 31),
  47 };
  48
  49 extern atomic_t ata_print_id;
  50 extern int atapi_passthru16;
  51 extern int libata_fua;
  52 extern int libata_noacpi;
  53 extern int libata_allow_tpm;
  54 extern struct device_type ata_port_type;
  55 extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
  56 extern void ata_force_cbl(struct ata_port *ap);
  57 extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
  58 extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
  59 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag);
  60 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  61                            u64 block, u32 n_block, unsigned int tf_flags,
  62                            unsigned int tag, int class);
  63 extern u64 ata_tf_read_block(const struct ata_taskfile *tf,
  64                              struct ata_device *dev);
  65 extern unsigned ata_exec_internal(struct ata_device *dev,
  66                                   struct ata_taskfile *tf, const u8 *cdb,
  67                                   int dma_dir, void *buf, unsigned int buflen,
  68                                   unsigned long timeout);
  69 extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  70                                      struct ata_taskfile *tf, const u8 *cdb,
  71                                      int dma_dir, struct scatterlist *sg,
  72                                      unsigned int n_elem, unsigned long timeout);
  73 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
  74                           int (*check_ready)(struct ata_link *link));
  75 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
  76                            unsigned int flags, u16 *id);
  77 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
  78 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  79                               unsigned int readid_flags);
  80 extern int ata_dev_configure(struct ata_device *dev);
  81 extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
  82 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
  83 extern unsigned int ata_dev_set_feature(struct ata_device *dev,
  84                                         u8 enable, u8 feature);
  85 extern void ata_qc_free(struct ata_queued_cmd *qc);
  86 extern void ata_qc_issue(struct ata_queued_cmd *qc);
  87 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
  88 extern int atapi_check_dma(struct ata_queued_cmd *qc);
  89 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
  90 extern bool ata_phys_link_online(struct ata_link *link);
  91 extern bool ata_phys_link_offline(struct ata_link *link);
  92 extern void ata_dev_init(struct ata_device *dev);
  93 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
  94 extern int sata_link_init_spd(struct ata_link *link);
  95 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
  96 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
  97 extern struct ata_port *ata_port_alloc(struct ata_host *host);
  98 extern const char *sata_spd_string(unsigned int spd);
  99 extern int ata_port_probe(struct ata_port *ap);
 100 extern void __ata_port_probe(struct ata_port *ap);
 101
 102 #define to_ata_port(d) container_of(d, struct ata_port, tdev)
 103
 104 /* libata-acpi.c */
 105 #ifdef CONFIG_ATA_ACPI
 106 extern unsigned int ata_acpi_gtf_filter;
 107 extern void ata_acpi_dissociate(struct ata_host *host);
 108 extern int ata_acpi_on_suspend(struct ata_port *ap);
 109 extern void ata_acpi_on_resume(struct ata_port *ap);
 110 extern int ata_acpi_on_devcfg(struct ata_device *dev);
 111 extern void ata_acpi_on_disable(struct ata_device *dev);
 112 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
 113 extern void ata_acpi_bind_port(struct ata_port *ap);
 114 extern void ata_acpi_bind_dev(struct ata_device *dev);
 115 extern acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
 116 #else
 117 static inline void ata_acpi_dissociate(struct ata_host *host) { }
 118 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 119 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
 120 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
 121 static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 122 static inline void ata_acpi_set_state(struct ata_port *ap,
 123                                       pm_message_t state) { }
 124 static inline void ata_acpi_bind_port(struct ata_port *ap) {}
 125 static inline void ata_acpi_bind_dev(struct ata_device *dev) {}
 126 #endif
 127
 128 /* libata-scsi.c */
 129 extern int ata_scsi_add_hosts(struct ata_host *host,
 130                               struct scsi_host_template *sht);
 131 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 132 extern int ata_scsi_offline_dev(struct ata_device *dev);
 133 extern void ata_scsi_set_sense(struct ata_device *dev,
 134                                struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq);
 135 extern void ata_scsi_set_sense_information(struct ata_device *dev,
 136                                            struct scsi_cmnd *cmd,
 137                                            const struct ata_taskfile *tf);
 138 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 139 extern void ata_scsi_hotplug(struct work_struct *work);
 140 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 141 extern void ata_scsi_dev_rescan(struct work_struct *work);
 142 extern int ata_bus_probe(struct ata_port *ap);
 143 extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
 144                               unsigned int id, u64 lun);
 145 int ata_sas_allocate_tag(struct ata_port *ap);
 146 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap);
 147
 148
 149 /* libata-eh.c */
 150 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
 151 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
 152 extern void ata_eh_acquire(struct ata_port *ap);
 153 extern void ata_eh_release(struct ata_port *ap);
 154 extern void ata_scsi_error(struct Scsi_Host *host);
 155 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 156 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 157 extern void ata_dev_disable(struct ata_device *dev);
 158 extern void ata_eh_detach_dev(struct ata_device *dev);
 159 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 160                                unsigned int action);
 161 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 162                         unsigned int action);
 163 extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
 164                                       u8 page, void *buf, unsigned int sectors);
 165 extern void ata_eh_autopsy(struct ata_port *ap);
 166 const char *ata_get_cmd_descript(u8 command);
 167 extern void ata_eh_report(struct ata_port *ap);
 168 extern int ata_eh_reset(struct ata_link *link, int classify,
 169                         ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 170                         ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
 171 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 172 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 173                           ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 174                           ata_postreset_fn_t postreset,
 175                           struct ata_link **r_failed_disk);
 176 extern void ata_eh_finish(struct ata_port *ap);
 177 extern int ata_ering_map(struct ata_ering *ering,
 178                          int (*map_fn)(struct ata_ering_entry *, void *),
 179                          void *arg);
 180 extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key);
 181 extern unsigned int atapi_eh_request_sense(struct ata_device *dev,
 182                                            u8 *sense_buf, u8 dfl_sense_key);
 183
 184 /* libata-pmp.c */
 185 #ifdef CONFIG_SATA_PMP
 186 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
 187 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
 188 extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
 189                             unsigned hints);
 190 extern int sata_pmp_attach(struct ata_device *dev);
 191 #else /* CONFIG_SATA_PMP */
 192 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
 193 {
 194         return -EINVAL;
 195 }
 196
 197 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
 198 {
 199         return -EINVAL;
 200 }
 201
 202 static inline int sata_pmp_set_lpm(struct ata_link *link,
 203                                    enum ata_lpm_policy policy, unsigned hints)
 204 {
 205         return -EINVAL;
 206 }
 207
 208 static inline int sata_pmp_attach(struct ata_device *dev)
 209 {
 210         return -EINVAL;
 211 }
 212 #endif /* CONFIG_SATA_PMP */
 213
 214 /* libata-sff.c */
 215 #ifdef CONFIG_ATA_SFF
 216 extern void ata_sff_flush_pio_task(struct ata_port *ap);
 217 extern void ata_sff_port_init(struct ata_port *ap);
 218 extern int ata_sff_init(void);
 219 extern void ata_sff_exit(void);
 220 #else /* CONFIG_ATA_SFF */
 221 static inline void ata_sff_flush_pio_task(struct ata_port *ap)
 222 { }
 223 static inline void ata_sff_port_init(struct ata_port *ap)
 224 { }
 225 static inline int ata_sff_init(void)
 226 { return 0; }
 227 static inline void ata_sff_exit(void)
 228 { }
 229 #endif /* CONFIG_ATA_SFF */
 230
 231 /* libata-zpodd.c */
 232 #ifdef CONFIG_SATA_ZPODD
 233 void zpodd_init(struct ata_device *dev);
 234 void zpodd_exit(struct ata_device *dev);
 235 static inline bool zpodd_dev_enabled(struct ata_device *dev)
 236 {
 237         return dev->zpodd != NULL;
 238 }
 239 void zpodd_on_suspend(struct ata_device *dev);
 240 bool zpodd_zpready(struct ata_device *dev);
 241 void zpodd_enable_run_wake(struct ata_device *dev);
 242 void zpodd_disable_run_wake(struct ata_device *dev);
 243 void zpodd_post_poweron(struct ata_device *dev);
 244 #else /* CONFIG_SATA_ZPODD */
 245 static inline void zpodd_init(struct ata_device *dev) {}
 246 static inline void zpodd_exit(struct ata_device *dev) {}
 247 static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; }
 248 static inline void zpodd_on_suspend(struct ata_device *dev) {}
 249 static inline bool zpodd_zpready(struct ata_device *dev) { return false; }
 250 static inline void zpodd_enable_run_wake(struct ata_device *dev) {}
 251 static inline void zpodd_disable_run_wake(struct ata_device *dev) {}
 252 static inline void zpodd_post_poweron(struct ata_device *dev) {}
 253 #endif /* CONFIG_SATA_ZPODD */
 254
 255 #endif /* __LIBATA_H__ */