ata_std_qc_defer – Check whether a qc needs to be deferred Synopsis int ata_std_qc_defer(struct ata_queued_cmd *qc); Arguments qc ATA command in question Description Non-NCQ commands cannot run with any other command, NCQ or not. As upper layer only knows the queue depth, we are responsible for maintaining exclusion. This function checks whether a new command qc…
ata_std_prereset – prepare for reset Synopsis int ata_std_prereset(struct ata_link *link, unsigned long deadline); Arguments link ATA link to be reset deadline deadline jiffies for the operation Description link is about to be reset. Initialize it. Failure from prereset makes libata abort whole reset sequence and give up that port, so prereset should be best-effort. It…
ata_std_postreset – standard postreset callback Synopsis void ata_std_postreset(struct ata_link *link, unsigned int *classes); Arguments link the target ata_link classes classes of attached devices Description This function is invoked after a successful reset. Note that the device might have been reset more than once using different reset methods before postreset is invoked. LOCKING: Kernel thread context…
ata_std_bios_param – generic bios head/sector/cylinder calculator used by sd. Synopsis int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]); Arguments sdev SCSI device for which BIOS geometry is to be determined bdev block device associated with sdev capacity capacity of SCSI device geom[] location to which geometry will be output Description Generic bios…
ata_slave_link_init – initialize slave link Synopsis int ata_slave_link_init(struct ata_port *ap); Arguments ap port to initialize slave link for Description Create and initialize slave link for ap. This enables slave link handling on the port. In libata, a port contains links and a link contains devices. There is single host link but if a PMP is…
ata_sg_setup – DMA-map the scatter-gather table associated with a command. Synopsis int ata_sg_setup(struct ata_queued_cmd *qc); Arguments qc Command with scatter-gather table to be mapped. Description DMA-map the scatter-gather table associated with queued_cmd qc. LOCKING: spin_lock_irqsave(host lock) Return Zero on success, negative on error. Author Jeff Garzik Author. Copyright
ata_sg_init – Associate command with scatter-gather table. Synopsis void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg, unsigned int n_elem); Arguments qc Command to be associated sg Scatter-gather table. n_elem Number of elements in s/g table. Description Initialize the data-related elements of queued_cmd qc to point to a scatter-gather table sg, containing n_elem elements. LOCKING: spin_lock_irqsave(host lock)…
ata_sg_clean – Unmap DMA memory associated with command Synopsis void ata_sg_clean(struct ata_queued_cmd *qc); Arguments qc Command containing DMA memory to be released Description Unmap all mapped DMA memory associated with this command. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_set_max_sectors – Set max sectors Synopsis int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors); Arguments dev target device new_sectors new max sectors value to set for the device Description Set max sectors of dev to new_sectors. Return 0 on success, -EACCES if command is aborted or denied (due to previous non-volatile SET_MAX) by the drive. -EIO on…
ata_scsiop_report_luns – Simulate REPORT LUNS command Synopsis unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Simulate REPORT LUNS command. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsiop_read_cap – Simulate READ CAPACITY[ 16] commands Synopsis unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Simulate READ CAPACITY commands. LOCKING: None. Author Jeff Garzik Author. Copyright
ata_scsiop_noop – Command handler that simply returns success. Synopsis unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description No operation. Simply returns success to caller, to indicate that the caller should successfully complete this SCSI…
ata_scsiop_mode_sense – Simulate MODE SENSE 6, 10 commands Synopsis unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Simulate MODE SENSE commands. Assume this is invoked for direct access devices (e.g. disks) only. There should…
ata_scsiop_maint_in – Simulate a subset of MAINTENANCE_IN Synopsis unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf); Arguments args device MAINTENANCE_IN data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Yields a subset to satisfy scsi_report_opcode LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsiop_inq_std – Simulate INQUIRY command Synopsis unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Returns standard device identification data associated with non-VPD INQUIRY command output. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsiop_inq_89 – Simulate INQUIRY VPD page 89, ATA info Synopsis unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Yields SAT-specified ATA VPD page. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsiop_inq_83 – Simulate INQUIRY VPD page 83, device identity Synopsis unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Yields two logical unit device identification designators: – vendor specific ASCII containing the ATA serial number…
ata_scsiop_inq_80 – Simulate INQUIRY VPD page 80, device serial number Synopsis unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Returns ATA device serial number. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsiop_inq_00 – Simulate INQUIRY VPD page 0, list of pages Synopsis unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf); Arguments args device IDENTIFY data / SCSI command of interest. rbuf Response buffer, to which simulated SCSI cmd output is sent. Description Returns list of inquiry VPD pages available. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_scsi_write_same_xlat – SATL Write Same to ATA SCT Write Same Synopsis unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc); Arguments qc Command to be translated Description Translate a SCSI WRITE SAME command to be either a DSM TRIM command or an SCT Write Same command. Based on WRITE SAME has the UNMAP flag When set translate to DSM…