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 static inline int ata_is_builtin_hardreset(ata_reset_fn_t reset)
  42 {
  43         if (reset == sata_std_hardreset)
  44                 return 1;
  45 #ifdef CONFIG_ATA_SFF
  46         if (reset == sata_sff_hardreset)
  47                 return 1;
  48 #endif
  49         return 0;
  50 }
  51
  52 /* libata-core.c */
  53 enum {
  54         /* flags for ata_dev_read_id() */
  55         ATA_READID_POSTRESET    = (1 << 0), /* reading ID after reset */
  56
  57         /* selector for ata_down_xfermask_limit() */
  58         ATA_DNXFER_PIO          = 0,    /* speed down PIO */
  59         ATA_DNXFER_DMA          = 1,    /* speed down DMA */
  60         ATA_DNXFER_40C          = 2,    /* apply 40c cable limit */
  61         ATA_DNXFER_FORCE_PIO    = 3,    /* force PIO */
  62         ATA_DNXFER_FORCE_PIO0   = 4,    /* force PIO0 */
  63
  64         ATA_DNXFER_QUIET        = (1 << 31),
  65 };
  66
  67 extern unsigned int ata_print_id;
  68 extern struct workqueue_struct *ata_aux_wq;
  69 extern int atapi_passthru16;
  70 extern int libata_fua;
  71 extern int libata_noacpi;
  72 extern int libata_allow_tpm;
  73 extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);
  74 extern void ata_force_cbl(struct ata_port *ap);
  75 extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
  76 extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
  77 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
  78 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  79                            u64 block, u32 n_block, unsigned int tf_flags,
  80                            unsigned int tag);
  81 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
  82 extern void ata_port_flush_task(struct ata_port *ap);
  83 extern unsigned ata_exec_internal(struct ata_device *dev,
  84                                   struct ata_taskfile *tf, const u8 *cdb,
  85                                   int dma_dir, void *buf, unsigned int buflen,
  86                                   unsigned long timeout);
  87 extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  88                                      struct ata_taskfile *tf, const u8 *cdb,
  89                                      int dma_dir, struct scatterlist *sg,
  90                                      unsigned int n_elem, unsigned long timeout);
  91 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
  92 extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
  93                           int (*check_ready)(struct ata_link *link));
  94 extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
  95                            unsigned int flags, u16 *id);
  96 extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);
  97 extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  98                               unsigned int readid_flags);
  99 extern int ata_dev_configure(struct ata_device *dev);
 100 extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
 101 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
 102 extern void ata_sg_clean(struct ata_queued_cmd *qc);
 103 extern void ata_qc_free(struct ata_queued_cmd *qc);
 104 extern void ata_qc_issue(struct ata_queued_cmd *qc);
 105 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
 106 extern int atapi_check_dma(struct ata_queued_cmd *qc);
 107 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
 108 extern bool ata_phys_link_online(struct ata_link *link);
 109 extern bool ata_phys_link_offline(struct ata_link *link);
 110 extern void ata_dev_init(struct ata_device *dev);
 111 extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
 112 extern int sata_link_init_spd(struct ata_link *link);
 113 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
 114 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
 115 extern struct ata_port *ata_port_alloc(struct ata_host *host);
 116 extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy);
 117 extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm);
 118
 119 /* libata-acpi.c */
 120 #ifdef CONFIG_ATA_ACPI
 121 extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 122 extern void ata_acpi_associate(struct ata_host *host);
 123 extern void ata_acpi_dissociate(struct ata_host *host);
 124 extern int ata_acpi_on_suspend(struct ata_port *ap);
 125 extern void ata_acpi_on_resume(struct ata_port *ap);
 126 extern int ata_acpi_on_devcfg(struct ata_device *dev);
 127 extern void ata_acpi_on_disable(struct ata_device *dev);
 128 extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);
 129 #else
 130 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 131 static inline void ata_acpi_associate(struct ata_host *host) { }
 132 static inline void ata_acpi_dissociate(struct ata_host *host) { }
 133 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 134 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
 135 static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
 136 static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 137 static inline void ata_acpi_set_state(struct ata_port *ap,
 138                                       pm_message_t state) { }
 139 #endif
 140
 141 /* libata-scsi.c */
 142 extern int ata_scsi_add_hosts(struct ata_host *host,
 143                               struct scsi_host_template *sht);
 144 extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
 145 extern int ata_scsi_offline_dev(struct ata_device *dev);
 146 extern void ata_scsi_media_change_notify(struct ata_device *dev);
 147 extern void ata_scsi_hotplug(struct work_struct *work);
 148 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 149 extern void ata_scsi_dev_rescan(struct work_struct *work);
 150 extern int ata_bus_probe(struct ata_port *ap);
 151
 152 /* libata-eh.c */
 153 extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
 154 extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
 155 extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 156 extern void ata_scsi_error(struct Scsi_Host *host);
 157 extern void ata_port_wait_eh(struct ata_port *ap);
 158 extern void ata_eh_fastdrain_timerfn(unsigned long arg);
 159 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 160 extern void ata_dev_disable(struct ata_device *dev);
 161 extern void ata_eh_detach_dev(struct ata_device *dev);
 162 extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
 163                                unsigned int action);
 164 extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
 165                         unsigned int action);
 166 extern void ata_eh_autopsy(struct ata_port *ap);
 167 const char *ata_get_cmd_descript(u8 command);
 168 extern void ata_eh_report(struct ata_port *ap);
 169 extern int ata_eh_reset(struct ata_link *link, int classify,
 170                         ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
 171                         ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);
 172 extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
 173 extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
 174                           ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
 175                           ata_postreset_fn_t postreset,
 176                           struct ata_link **r_failed_disk);
 177 extern void ata_eh_finish(struct ata_port *ap);
 178
 179 /* libata-pmp.c */
 180 #ifdef CONFIG_SATA_PMP
 181 extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
 182 extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
 183 extern int sata_pmp_attach(struct ata_device *dev);
 184 #else /* CONFIG_SATA_PMP */
 185 static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
 186 {
 187         return -EINVAL;
 188 }
 189
 190 static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
 191 {
 192         return -EINVAL;
 193 }
 194
 195 static inline int sata_pmp_attach(struct ata_device *dev)
 196 {
 197         return -EINVAL;
 198 }
 199 #endif /* CONFIG_SATA_PMP */
 200
 201 /* libata-sff.c */
 202 #ifdef CONFIG_ATA_SFF
 203 extern void ata_dev_select(struct ata_port *ap, unsigned int device,
 204                            unsigned int wait, unsigned int can_sleep);
 205 extern u8 ata_irq_on(struct ata_port *ap);
 206 extern void ata_pio_task(struct work_struct *work);
 207 #endif /* CONFIG_ATA_SFF */
 208
 209 #endif /* __LIBATA_H__ */