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
  33 struct ata_scsi_args {
  34         struct ata_device       *dev;
  35         u16                     *id;
  36         struct scsi_cmnd        *cmd;
  37         void                    (*done)(struct scsi_cmnd *);
  38 };
  39
  40 /* libata-core.c */
  41 enum {
  42         /* flags for ata_dev_read_id() */
  43         ATA_READID_POSTRESET    = (1 << 0), /* reading ID after reset */
  44
  45         /* selector for ata_down_xfermask_limit() */
  46         ATA_DNXFER_PIO          = 0,    /* speed down PIO */
  47         ATA_DNXFER_DMA          = 1,    /* speed down DMA */
  48         ATA_DNXFER_40C          = 2,    /* apply 40c cable limit */
  49         ATA_DNXFER_FORCE_PIO    = 3,    /* force PIO */
  50         ATA_DNXFER_FORCE_PIO0   = 4,    /* force PIO0 */
  51
  52         ATA_DNXFER_QUIET        = (1 << 31),
  53 };
  54
  55 extern struct workqueue_struct *ata_aux_wq;
  56 extern int atapi_enabled;
  57 extern int atapi_dmadir;
  58 extern int libata_fua;
  59 extern int libata_noacpi;
  60 extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);
  61 extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  62                            u64 block, u32 n_block, unsigned int tf_flags,
  63                            unsigned int tag);
  64 extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);
  65 extern void ata_dev_disable(struct ata_device *dev);
  66 extern void ata_port_flush_task(struct ata_port *ap);
  67 extern unsigned ata_exec_internal(struct ata_device *dev,
  68                                   struct ata_taskfile *tf, const u8 *cdb,
  69                                   int dma_dir, void *buf, unsigned int buflen);
  70 extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  71                                      struct ata_taskfile *tf, const u8 *cdb,
  72                                      int dma_dir, struct scatterlist *sg,
  73                                      unsigned int n_elem);
  74 extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);
  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_revalidate(struct ata_device *dev, unsigned int flags);
  78 extern int ata_dev_configure(struct ata_device *dev);
  79 extern int sata_down_spd_limit(struct ata_port *ap);
  80 extern int sata_set_spd_needed(struct ata_port *ap);
  81 extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
  82 extern int ata_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
  83 extern void ata_sg_clean(struct ata_queued_cmd *qc);
  84 extern void ata_qc_free(struct ata_queued_cmd *qc);
  85 extern void ata_qc_issue(struct ata_queued_cmd *qc);
  86 extern void __ata_qc_complete(struct ata_queued_cmd *qc);
  87 extern int ata_check_atapi_dma(struct ata_queued_cmd *qc);
  88 extern void ata_dev_select(struct ata_port *ap, unsigned int device,
  89                            unsigned int wait, unsigned int can_sleep);
  90 extern void swap_buf_le16(u16 *buf, unsigned int buf_words);
  91 extern int ata_flush_cache(struct ata_device *dev);
  92 extern void ata_dev_init(struct ata_device *dev);
  93 extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
  94 extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
  95 extern void ata_port_init(struct ata_port *ap, struct ata_host *host,
  96                           const struct ata_probe_ent *ent, unsigned int port_no);
  97 extern struct ata_probe_ent *ata_probe_ent_alloc(struct device *dev,
  98                                                  const struct ata_port_info *port);
  99
 100 /* libata-acpi.c */
 101 #ifdef CONFIG_SATA_ACPI
 102 extern int ata_acpi_exec_tfs(struct ata_port *ap);
 103 extern int ata_acpi_push_id(struct ata_port *ap, unsigned int ix);
 104 #else
 105 static inline int ata_acpi_exec_tfs(struct ata_port *ap)
 106 {
 107         return 0;
 108 }
 109 static inline int ata_acpi_push_id(struct ata_port *ap, unsigned int ix)
 110 {
 111         return 0;
 112 }
 113 #endif
 114
 115 /* libata-scsi.c */
 116 extern struct scsi_transport_template ata_scsi_transport_template;
 117
 118 extern void ata_scsi_scan_host(struct ata_port *ap);
 119 extern int ata_scsi_offline_dev(struct ata_device *dev);
 120 extern void ata_scsi_hotplug(struct work_struct *work);
 121 extern unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
 122                                unsigned int buflen);
 123
 124 extern unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
 125                               unsigned int buflen);
 126
 127 extern unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
 128                               unsigned int buflen);
 129 extern unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
 130                               unsigned int buflen);
 131 extern unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
 132                             unsigned int buflen);
 133 extern unsigned int ata_scsiop_sync_cache(struct ata_scsi_args *args, u8 *rbuf,
 134                                   unsigned int buflen);
 135 extern unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
 136                                   unsigned int buflen);
 137 extern unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
 138                                 unsigned int buflen);
 139 extern unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
 140                                    unsigned int buflen);
 141 extern void ata_scsi_badcmd(struct scsi_cmnd *cmd,
 142                             void (*done)(struct scsi_cmnd *),
 143                             u8 asc, u8 ascq);
 144 extern void ata_scsi_set_sense(struct scsi_cmnd *cmd,
 145                                u8 sk, u8 asc, u8 ascq);
 146 extern void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
 147                         unsigned int (*actor) (struct ata_scsi_args *args,
 148                                            u8 *rbuf, unsigned int buflen));
 149 extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
 150 extern void ata_scsi_dev_rescan(struct work_struct *work);
 151 extern int ata_bus_probe(struct ata_port *ap);
 152
 153 /* libata-eh.c */
 154 extern enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
 155 extern void ata_scsi_error(struct Scsi_Host *host);
 156 extern void ata_port_wait_eh(struct ata_port *ap);
 157 extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);
 158
 159 /* libata-sff.c */
 160 extern u8 ata_irq_on(struct ata_port *ap);
 161
 162
 163 #endif /* __LIBATA_H__ */