ata_scsi_hotplug – SCSI part of hotplug Synopsis void ata_scsi_hotplug(struct work_struct *work); Arguments work Pointer to ATA port to perform SCSI hotplug on Description Perform SCSI part of hotplug. It’s executed from a separate workqueue after EH completes. This is necessary because SCSI hot plugging requires working EH and hot unplugging is synchronized with hot plugging…
ata_scsi_flush_xlat – Translate SCSI SYNCHRONIZE CACHE command Synopsis unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc); Arguments qc Storage for translated ATA taskfile Description Sets up an ATA taskfile to issue FLUSH CACHE or FLUSH CACHE EXT. LOCKING: spin_lock_irqsave(host lock) Return Zero on success, non-zero on error. Author Jeff Garzik Author. Copyright
ata_scsi_find_dev – lookup ata_device from scsi_cmnd Synopsis struct ata_device *ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); Arguments ap ATA port to which the device is attached scsidev SCSI device from which we derive the ATA device Description Given various information provided in struct scsi_cmnd, map that onto an ATA bus, and using that mapping determine…
ata_scsi_dump_cdb – dump SCSI command contents to dmesg Synopsis void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd); Arguments ap ATA port to which the command was being sent cmd SCSI command to dump Description Prints the contents of a SCSI command via printk. Author Jeff Garzik Author. Copyright
ata_scsi_dev_rescan – initiate scsi_rescan_device Synopsis void ata_scsi_dev_rescan(struct work_struct *work); Arguments work Pointer to ATA port to perform scsi_rescan_device Description After ATA pass thru (SAT) commands are executed successfully, libata need to propagate the changes to SCSI layer. LOCKING: Kernel thread context (may sleep). Author Jeff Garzik Author. Copyright
ata_scsi_change_queue_depth – SCSI callback for queue depth config Synopsis int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth); Arguments sdev SCSI device to configure queue depth for queue_depth new queue depth Description This is libata standard hostt->change_queue_depth callback. SCSI will call into this callback when user tries to set queue depth via sysfs. LOCKING: SCSI layer (we don’t…
ata_sas_slave_configure – Default slave_config routine for libata devices Synopsis int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap); Arguments sdev SCSI device to configure ap ATA port to which SCSI device is attached Return Zero. Author Jeff Garzik Author. Copyright
ata_sas_queuecmd – Issue SCSI cdb to libata-managed device Synopsis int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap); Arguments cmd SCSI command to be sent ap ATA port to which the command is being sent Return Return value from __ata_scsi_queuecmd if cmd can be queued, 0 otherwise. Author Jeff Garzik Author. Copyright
ata_sas_port_stop – Undo ata_sas_port_start Synopsis void ata_sas_port_stop(struct ata_port *ap); Arguments ap Port to shut down Description May be used as the port_stop entry in ata_port_operations. LOCKING: Inherited from caller. Author Jeff Garzik Author. Copyright
ata_sas_port_start – Set port up for dma. Synopsis int ata_sas_port_start(struct ata_port *ap); Arguments ap Port to initialize Description Called just after data structures for each port are initialized. May be used as the port_start entry in ata_port_operations. LOCKING: Inherited from caller. Author Jeff Garzik Author. Copyright
ata_sas_port_init – Initialize a SATA device Synopsis int ata_sas_port_init(struct ata_port *ap); Arguments ap SATA port to initialize Description LOCKING: PCI/etc. bus probe sem. Return Zero on success, non-zero on error. Author Jeff Garzik Author. Copyright
ata_sas_port_destroy – Destroy a SATA port allocated by ata_sas_port_alloc Synopsis void ata_sas_port_destroy(struct ata_port *ap); Arguments ap SATA port to destroy Author Jeff Garzik Author. Copyright
ata_sas_port_alloc – Allocate port for a SAS attached SATA device Synopsis struct ata_port *ata_sas_port_alloc(struct ata_host *host, struct ata_port_info *port_info, struct Scsi_Host *shost); Arguments host ATA host container for all SAS ports port_info Information from low-level host driver shost SCSI host that the scsi device is attached to Description LOCKING: PCI/etc. bus probe sem. Return ata_port…
ata_sas_async_probe – simply schedule probing and return Synopsis void ata_sas_async_probe(struct ata_port *ap); Arguments ap Port to probe Description For batch scheduling of probe for sas attached ata devices, assumes the port has already been through ata_sas_port_init Author Jeff Garzik Author. Copyright
ata_rwcmd_protocol – set taskfile r/w commands and protocol Synopsis int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev); Arguments tf command to examine and configure dev device tf belongs to Description Examine the device configuration and tf->flags to calculate the proper read/write commands and protocol to use. LOCKING: caller. Author Jeff Garzik Author. Copyright
ata_read_native_max_address – Read native max address Synopsis int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors); Arguments dev target device max_sectors out parameter for the result native max address Description Perform an LBA48 or LBA28 native size query upon the device in question. Return 0 on success, -EACCES if command is aborted by the drive. -EIO on other…
ata_qc_new_init – Request an available ATA command, and initialize it Synopsis struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev, int tag); Arguments dev Device from whom we request an available command structure tag tag Description LOCKING: None. Author Jeff Garzik Author. Copyright
ata_qc_issue – issue taskfile to device Synopsis void ata_qc_issue(struct ata_queued_cmd *qc); Arguments qc command to issue to device Description Prepare an ATA command to submission to device. This includes mapping the data into a DMA-able area, filling in the S/G table, and finally writing the taskfile to hardware, starting the command. LOCKING: spin_lock_irqsave(host lock) Author…
ata_qc_free – free unused ata_queued_cmd Synopsis void ata_qc_free(struct ata_queued_cmd *qc); Arguments qc Command to complete Description Designed to free unused ata_queued_cmd object in case something prevents using it. LOCKING: spin_lock_irqsave(host lock) Author Jeff Garzik Author. Copyright
ata_qc_complete_multiple – Complete multiple qcs successfully Synopsis int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active); Arguments ap port in question qc_active new qc_active mask Description Complete in-flight commands. This functions is meant to be called from low-level driver’s interrupt routine to complete requests normally. ap->qc_active and qc_active is compared and commands are completed accordingly. Always use this…