/*

   *  libata.h - helper library for ATA
   *
   *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   *  Copyright 2003-2004 Jeff Garzik
   *
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2, or (at your option)
   *  any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *  along with this program; see the file COPYING.  If not, write to
   *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
   *
   *
   *  libata documentation is available via 'make {ps|pdf}docs',
   *  as Documentation/DocBook/libata.*
   *

   */
  
  #ifndef __LIBATA_H__
  #define __LIBATA_H__
  
  #define DRV_NAME	"libata"

  #define DRV_VERSION	"3.00"	/* must be exactly four chars */

  
  struct ata_scsi_args {

  	struct ata_device	*dev;

  	u16			*id;
  	struct scsi_cmnd	*cmd;
  	void			(*done)(struct scsi_cmnd *);
  };
  
  /* libata-core.c */

  enum {
  	/* flags for ata_dev_read_id() */
  	ATA_READID_POSTRESET	= (1 << 0), /* reading ID after reset */

  
  	/* selector for ata_down_xfermask_limit() */
  	ATA_DNXFER_PIO		= 0,	/* speed down PIO */
  	ATA_DNXFER_DMA		= 1,	/* speed down DMA */
  	ATA_DNXFER_40C		= 2,	/* apply 40c cable limit */
  	ATA_DNXFER_FORCE_PIO	= 3,	/* force PIO */
  	ATA_DNXFER_FORCE_PIO0	= 4,	/* force PIO0 */

  
  	ATA_DNXFER_QUIET	= (1 << 31),

  };

  extern atomic_t ata_print_id;

  extern int atapi_passthru16;

  extern int libata_fua;

  extern int libata_noacpi;

  extern int libata_allow_tpm;

  extern struct device_type ata_port_type;

  extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);

  extern void ata_force_cbl(struct ata_port *ap);

  extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
  extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);

  extern struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev);

  extern int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
  			   u64 block, u32 n_block, unsigned int tf_flags,
  			   unsigned int tag);

  extern u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev);

  extern unsigned ata_exec_internal(struct ata_device *dev,

  				  struct ata_taskfile *tf, const u8 *cdb,

  				  int dma_dir, void *buf, unsigned int buflen,
  				  unsigned long timeout);

  extern unsigned ata_exec_internal_sg(struct ata_device *dev,
  				     struct ata_taskfile *tf, const u8 *cdb,
  				     int dma_dir, struct scatterlist *sg,

  				     unsigned int n_elem, unsigned long timeout);

  extern unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd);

  extern int ata_wait_ready(struct ata_link *link, unsigned long deadline,
  			  int (*check_ready)(struct ata_link *link));

  extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,

  			   unsigned int flags, u16 *id);

  extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags);

  extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
  			      unsigned int readid_flags);

  extern int ata_dev_configure(struct ata_device *dev);

  extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);

  extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);

  extern unsigned int ata_dev_set_feature(struct ata_device *dev,
  					u8 enable, u8 feature);

  extern void ata_sg_clean(struct ata_queued_cmd *qc);

  extern void ata_qc_free(struct ata_queued_cmd *qc);

  extern void ata_qc_issue(struct ata_queued_cmd *qc);

  extern void __ata_qc_complete(struct ata_queued_cmd *qc);

  extern int atapi_check_dma(struct ata_queued_cmd *qc);

  extern void swap_buf_le16(u16 *buf, unsigned int buf_words);

  extern bool ata_phys_link_online(struct ata_link *link);
  extern bool ata_phys_link_offline(struct ata_link *link);

  extern void ata_dev_init(struct ata_device *dev);

  extern void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp);
  extern int sata_link_init_spd(struct ata_link *link);

  extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
  extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);

  extern struct ata_port *ata_port_alloc(struct ata_host *host);

  extern const char *sata_spd_string(unsigned int spd);

  extern int ata_port_probe(struct ata_port *ap);

  extern void __ata_port_probe(struct ata_port *ap);

  #define to_ata_port(d) container_of(d, struct ata_port, tdev)

  /* libata-acpi.c */

  #ifdef CONFIG_ATA_ACPI

  extern unsigned int ata_acpi_gtf_filter;

  extern void ata_acpi_dissociate(struct ata_host *host);

  extern int ata_acpi_on_suspend(struct ata_port *ap);

  extern void ata_acpi_on_resume(struct ata_port *ap);

  extern int ata_acpi_on_devcfg(struct ata_device *dev);
  extern void ata_acpi_on_disable(struct ata_device *dev);

  extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state);

  extern int ata_acpi_register(void);
  extern void ata_acpi_unregister(void);

  extern void ata_acpi_bind(struct ata_device *dev);
  extern void ata_acpi_unbind(struct ata_device *dev);

  #else

  static inline void ata_acpi_dissociate(struct ata_host *host) { }

  static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }

  static inline void ata_acpi_on_resume(struct ata_port *ap) { }

  static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
  static inline void ata_acpi_on_disable(struct ata_device *dev) { }

  static inline void ata_acpi_set_state(struct ata_port *ap,
  				      pm_message_t state) { }

  static inline int ata_acpi_register(void) { return 0; }

  static inline void ata_acpi_unregister(void) { }
  static inline void ata_acpi_bind(struct ata_device *dev) { }
  static inline void ata_acpi_unbind(struct ata_device *dev) { }

  #endif

  
  /* libata-scsi.c */

  extern int ata_scsi_add_hosts(struct ata_host *host,
  			      struct scsi_host_template *sht);

  extern void ata_scsi_scan_host(struct ata_port *ap, int sync);

  extern int ata_scsi_offline_dev(struct ata_device *dev);

  extern void ata_scsi_media_change_notify(struct ata_device *dev);

  extern void ata_scsi_hotplug(struct work_struct *work);

  extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);

  extern void ata_scsi_dev_rescan(struct work_struct *work);

  extern int ata_bus_probe(struct ata_port *ap);

  extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
  			      unsigned int id, unsigned int lun);

  /* libata-eh.c */

  extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
  extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);

  extern void ata_eh_acquire(struct ata_port *ap);
  extern void ata_eh_release(struct ata_port *ap);

  extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);

  extern void ata_scsi_error(struct Scsi_Host *host);

  extern void ata_eh_fastdrain_timerfn(unsigned long arg);

  extern void ata_qc_schedule_eh(struct ata_queued_cmd *qc);

  extern void ata_dev_disable(struct ata_device *dev);

  extern void ata_eh_detach_dev(struct ata_device *dev);
  extern void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
  			       unsigned int action);
  extern void ata_eh_done(struct ata_link *link, struct ata_device *dev,
  			unsigned int action);
  extern void ata_eh_autopsy(struct ata_port *ap);

  const char *ata_get_cmd_descript(u8 command);

  extern void ata_eh_report(struct ata_port *ap);
  extern int ata_eh_reset(struct ata_link *link, int classify,
  			ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
  			ata_reset_fn_t hardreset, ata_postreset_fn_t postreset);

  extern int ata_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);

  extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
  			  ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
  			  ata_postreset_fn_t postreset,
  			  struct ata_link **r_failed_disk);
  extern void ata_eh_finish(struct ata_port *ap);

  extern int ata_ering_map(struct ata_ering *ering,
  			 int (*map_fn)(struct ata_ering_entry *, void *),
  		  	 void *arg);

  /* libata-pmp.c */

  #ifdef CONFIG_SATA_PMP

  extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
  extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);

  extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
  			    unsigned hints);

  extern int sata_pmp_attach(struct ata_device *dev);

  #else /* CONFIG_SATA_PMP */
  static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
  {
  	return -EINVAL;
  }
  
  static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
  {
  	return -EINVAL;
  }

  static inline int sata_pmp_set_lpm(struct ata_link *link,
  				   enum ata_lpm_policy policy, unsigned hints)
  {
  	return -EINVAL;
  }

  static inline int sata_pmp_attach(struct ata_device *dev)
  {
  	return -EINVAL;
  }
  #endif /* CONFIG_SATA_PMP */

  /* libata-sff.c */

  #ifdef CONFIG_ATA_SFF

  extern void ata_sff_flush_pio_task(struct ata_port *ap);

  extern void ata_sff_port_init(struct ata_port *ap);
  extern int ata_sff_init(void);
  extern void ata_sff_exit(void);
  #else /* CONFIG_ATA_SFF */

  static inline void ata_sff_flush_pio_task(struct ata_port *ap)
  { }

  static inline void ata_sff_port_init(struct ata_port *ap)
  { }
  static inline int ata_sff_init(void)
  { return 0; }
  static inline void ata_sff_exit(void)
  { }

  #endif /* CONFIG_ATA_SFF */

  #endif /* __LIBATA_H__ */