SATA_LINK_SCR_LPM(9) libata Library SATA_LINK_SCR_LPM(9)NAME
sata_link_scr_lpm - manipulate SControl IPM and SPM fields
int sata_link_scr_lpm(struct ata_link * link, enum ata_lpm_policy policy, bool spm_wakeup);
ATA link to manipulate SControl for
LPM policy to configure
initiate LPM transition to active state
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.
0 on succes, -errno otherwise.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SATA_LINK_SCR_LPM(9)
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ATA_SCSI_TRANSLATE(9) libata SCSI translation/emulat ATA_SCSI_TRANSLATE(9)NAME
ata_scsi_translate - Translate then issue SCSI command to ATA device
int ata_scsi_translate(struct ata_device * dev, struct scsi_cmnd * cmd, void (*done) (struct scsi_cmnd *), ata_xlat_func_t xlat_func);
ATA device to which the command is addressed
SCSI command to execute
SCSI command completion function
Actor which translates cmd to an ATA taskfile
Our ->queuecommand function has decided that the SCSI command issued can be directly translated into an ATA command, rather than handled
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.
0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command needs to be deferred.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 ATA_SCSI_TRANSLATE(9)
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