/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  libata.h - helper library for ATA
 *
 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
 *  Copyright 2003-2004 Jeff Garzik
 *
 *  libata documentation is available via 'make {ps|pdf}docs',
 *  as Documentation/driver-api/libata.rst
 */

#ifndef __LIBATA_H__
#define __LIBATA_H__

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

/* 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),
};

#define ATA_PORT_TYPE_NAME	"ata_port"

extern int atapi_passthru16;
extern int libata_fua;
extern int libata_noacpi;
extern int libata_allow_tpm;
extern const struct device_type ata_port_type;
extern struct ata_link *ata_dev_phys_link(struct ata_device *dev);

static inline bool ata_sstatus_online(u32 sstatus)
{
	return (sstatus & 0xf) == 0x3;
}

static inline bool ata_dev_is_zoned(struct ata_device *dev)
{
	/* Host managed device or host aware device */
	return dev->class == ATA_DEV_ZAC ||
		ata_id_zoned_cap(dev->id) == 0x01;
}

static inline bool ata_port_eh_scheduled(struct ata_port *ap)
{
	return ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS);
}

#ifdef CONFIG_ATA_FORCE
extern void ata_force_cbl(struct ata_port *ap);
#else
static inline void ata_force_cbl(struct ata_port *ap) { }
#endif
extern u64 ata_tf_to_lba(const struct ata_taskfile *tf);
extern u64 ata_tf_to_lba48(const struct ata_taskfile *tf);
extern int ata_build_rw_tf(struct ata_queued_cmd *qc, u64 block, u32 n_block,
			   unsigned int tf_flags, int dld, int class);
extern u64 ata_tf_read_block(const struct ata_taskfile *tf,
			     struct ata_device *dev);
unsigned int ata_exec_internal(struct ata_device *dev, struct ata_taskfile *tf,
			       const u8 *cdb, enum dma_data_direction dma_dir,
			       void *buf, unsigned int buflen,
			       unsigned int timeout);
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 bool ata_dev_power_init_tf(struct ata_device *dev,
				  struct ata_taskfile *tf, bool set_active);
extern void ata_dev_power_set_standby(struct ata_device *dev);
extern void ata_dev_power_set_active(struct ata_device *dev);
void ata_dev_free_resources(struct ata_device *dev);
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 subcmd, u8 action);
extern void ata_qc_free(struct ata_queued_cmd *qc);
extern void ata_qc_issue(struct ata_port *ap, struct ata_queued_cmd *qc)
	__must_hold(ap->lock);
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);
bool ata_adapter_is_online(struct ata_port *ap);
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 const char *sata_spd_string(unsigned int spd);
extern unsigned int ata_read_log_page(struct ata_device *dev, u8 log,
				      u8 page, void *buf, unsigned int sectors);

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

/* libata-sata.c */
#ifdef CONFIG_SATA_HOST
int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
int ata_eh_get_ncq_success_sense(struct ata_link *link);
#else
static inline int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
{
	return -EOPNOTSUPP;
}
static inline int ata_eh_get_ncq_success_sense(struct ata_link *link)
{
	return -EOPNOTSUPP;
}
#endif

/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern unsigned int ata_acpi_gtf_filter;
extern void ata_acpi_dissociate(struct ata_host *host);
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 void ata_acpi_bind_port(struct ata_port *ap);
extern void ata_acpi_bind_dev(struct ata_device *dev);
extern void ata_acpi_port_power_on(struct ata_port *ap);
extern bool ata_acpi_dev_manage_restart(struct ata_device *dev);
extern acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
#else
static inline void ata_acpi_dissociate(struct ata_host *host) { }
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 void ata_acpi_bind_port(struct ata_port *ap) {}
static inline void ata_acpi_bind_dev(struct ata_device *dev) {}
static inline void ata_acpi_port_power_on(struct ata_port *ap) {}
static inline bool ata_acpi_dev_manage_restart(struct ata_device *dev) { return 0; }
#endif

/* libata-scsi.c */
#define ATA_SCSI_RBUF_SIZE	2048

/*
 * Maximum number of concurrent positioning ranges (CPR) supported. The ACS
 * specifications allow up to 255, but we limit this to the number of CPR
 * descriptors that fit in the rbuf buffer used to emit VPD page B9h.
 */
#define ATA_DEV_MAX_CPR		min(255, ((ATA_SCSI_RBUF_SIZE - 64) / 32))

extern struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
					    const struct scsi_device *scsidev);
extern int ata_scsi_add_hosts(struct ata_host *host,
			      const struct scsi_host_template *sht);
extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
extern bool ata_scsi_offline_dev(struct ata_device *dev);
extern bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq);
extern void ata_scsi_set_sense(struct ata_device *dev,
			       struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq);
extern void ata_scsi_media_change_notify(struct ata_device *dev);
extern void ata_scsi_hotplug(struct work_struct *work);
extern void ata_scsi_dev_rescan(struct work_struct *work);
extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
			      unsigned int id, u64 lun);
void ata_scsi_sdev_config(struct scsi_device *sdev);
int ata_scsi_dev_config(struct scsi_device *sdev, struct queue_limits *lim,
		struct ata_device *dev);
enum scsi_qc_status __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
					struct ata_device *dev,
					struct ata_port *ap)
	__must_hold(ap->lock);
void ata_scsi_deferred_qc_work(struct work_struct *work);
enum scsi_timeout_action ata_scsi_requeue_deferred_qc(struct ata_port *ap,
						      struct scsi_cmnd *scmd);

/* libata-eh.c */
extern unsigned int 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)
	__acquires(&ap->host->eh_mutex);
extern void ata_eh_release(struct ata_port *ap)
	__releases(&ap->host->eh_mutex);
extern void ata_scsi_error(struct Scsi_Host *host);
extern void ata_eh_fastdrain_timerfn(struct timer_list *t);
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_name(u8 command);
extern void ata_eh_report(struct ata_port *ap);
extern int ata_eh_reset(struct ata_port *ap, struct ata_link *link,
			int classify, struct ata_reset_operations *reset_ops)
	__must_hold(&ap->host->eh_mutex);
extern int ata_eh_recover(struct ata_port *ap,
			  struct ata_reset_operations *reset_ops,
			  struct ata_link **r_failed_disk)
	__must_hold(&ap->host->eh_mutex);
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);
enum scsi_disposition ata_eh_decide_disposition(struct ata_queued_cmd *qc);
extern unsigned int atapi_eh_tur(struct ata_device *dev, u8 *r_sense_key);
extern unsigned int atapi_eh_request_sense(struct ata_device *dev,
					   u8 *sense_buf, u8 dfl_sense_key);

/* 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 */

/* libata-zpodd.c */
#ifdef CONFIG_SATA_ZPODD
void zpodd_init(struct ata_device *dev);
void zpodd_exit(struct ata_device *dev);
static inline bool zpodd_dev_enabled(struct ata_device *dev)
{
	return dev->zpodd != NULL;
}
void zpodd_on_suspend(struct ata_device *dev);
bool zpodd_zpready(struct ata_device *dev);
void zpodd_enable_run_wake(struct ata_device *dev);
void zpodd_disable_run_wake(struct ata_device *dev);
void zpodd_post_poweron(struct ata_device *dev);
#else /* CONFIG_SATA_ZPODD */
static inline void zpodd_init(struct ata_device *dev) {}
static inline void zpodd_exit(struct ata_device *dev) {}
static inline bool zpodd_dev_enabled(struct ata_device *dev) { return false; }
static inline void zpodd_on_suspend(struct ata_device *dev) {}
static inline bool zpodd_zpready(struct ata_device *dev) { return false; }
static inline void zpodd_enable_run_wake(struct ata_device *dev) {}
static inline void zpodd_disable_run_wake(struct ata_device *dev) {}
static inline void zpodd_post_poweron(struct ata_device *dev) {}
#endif /* CONFIG_SATA_ZPODD */

#endif /* __LIBATA_H__ */