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linux/drivers/ata/libata.h
Damien Le Moal 8c1f081706 ata: libata-scsi: Cleanup ata_scsi_start_stop_xlat() 
Now that libata does its own internal device power mode management
through libata EH, the scsi disk driver will not issue START STOP UNIT
commands anymore. We can receive this command only from user passthrough
operations. So there is no need to consider the system state and ATA
port flags for suspend to translate the command.

Since setting up the taskfile for the verify and standby
immediate commands is the same as done in ata_dev_power_set_active()
and ata_dev_power_set_standby(), factor out this code into the helper
function ata_dev_power_init_tf() to simplify ata_scsi_start_stop_xlat()
as well as ata_dev_power_set_active() and ata_dev_power_set_standby().

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-10-03 09:39:49 +09:00

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/* 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 atomic_t ata_print_id;
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);
#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);
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 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);
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 subcmd, u8 action);
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 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-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 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) {}
#endif
/* libata-scsi.c */
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 int 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_set_sense_information(struct ata_device *dev,
struct scsi_cmnd *cmd,
const struct ata_taskfile *tf);
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_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 ata_device *dev);
int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev);
/* 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);
extern void ata_eh_release(struct ata_port *ap);
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_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);
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__ */
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