SATA_LINK_SCR_LPM(9) libata Library SATA_LINK_SCR_LPM(9)NAME
sata_link_scr_lpm - manipulate SControl IPM and SPM fields
SYNOPSIS
int sata_link_scr_lpm(struct ata_link * link, enum ata_lpm_policy policy, bool spm_wakeup);
ARGUMENTS
link
ATA link to manipulate SControl for
policy
LPM policy to configure
spm_wakeup
initiate LPM transition to active state
DESCRIPTION
Manipulate the IPM field of the SControl register of link according to policy. If policy is ATA_LPM_MAX_POWER and spm_wakeup is true, the
SPM field is manipulated to wake up the link. This function also clears PHYRDY_CHG before returning.
LOCKING
EH context.
RETURNS
0 on succes, -errno otherwise.
AUTHOR
Jeff Garzik
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SATA_LINK_SCR_LPM(9)
Check Out this Related Man Page
ATA_SCSI_TRANSLATE(9) libata SCSI translation/emulat ATA_SCSI_TRANSLATE(9)NAME
ata_scsi_translate - Translate then issue SCSI command to ATA device
SYNOPSIS
int ata_scsi_translate(struct ata_device * dev, struct scsi_cmnd * cmd, void (*done) (struct scsi_cmnd *), ata_xlat_func_t xlat_func);
ARGUMENTS
dev
ATA device to which the command is addressed
cmd
SCSI command to execute
done
SCSI command completion function
xlat_func
Actor which translates cmd to an ATA taskfile
DESCRIPTION
Our ->queuecommand function has decided that the SCSI command issued can be directly translated into an ATA command, rather than handled
internally.
This function sets up an ata_queued_cmd structure for the SCSI command, and sends that ata_queued_cmd to the hardware.
The xlat_func argument (actor) returns 0 if ready to execute ATA command, else 1 to finish translation. If 1 is returned then cmd->result
(and possibly cmd->sense_buffer) are assumed to be set reflecting an error condition or clean (early) termination.
LOCKING
spin_lock_irqsave(host lock)
RETURNS
0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command needs to be deferred.
AUTHOR
Jeff Garzik
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 ATA_SCSI_TRANSLATE(9)
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