scsi_get_vpd_page – Get Vital Product Data from a SCSI device Synopsis int scsi_get_vpd_page(struct scsi_device *sdev, u8 page, unsigned char *buf, int buf_len); Arguments sdev The device to ask page Which Vital Product Data to return buf where to store the VPD buf_len number of bytes in the VPD buffer area Description SCSI devices may optionally…
scsi_get_sense_info_fld – get information field from sense data (either fixed or descriptor format) Synopsis int scsi_get_sense_info_fld(const u8 *sense_buffer, int sb_len, u64 *info_out); Arguments sense_buffer byte array of sense data sb_len number of valid bytes in sense_buffer info_out pointer to 64 integer where 8 or 4 byte information field will be placed if found. Description Return…
scsi_get_device_flags – get device specific flags from the dynamic device list. Synopsis int scsi_get_device_flags(struct scsi_device *sdev, const unsigned char *vendor, const unsigned char *model); Arguments sdev scsi_device to get flags for vendor vendor name model model name Description Search the global scsi_dev_info_list (specified by list zero) for an entry matching vendor and model, if found,…
scsi_flush_work – Flush a Scsi_Host’s workqueue. Synopsis void scsi_flush_work(struct Scsi_Host *shost); Arguments shost Pointer to Scsi_Host. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_finish_async_scan – asynchronous scan has finished Synopsis void scsi_finish_async_scan(struct async_scan_data *data); Arguments data cookie returned from earlier call to scsi_prep_async_scan Description All the devices currently attached to this host have been found. This function announces all the devices it has found to the rest of the system. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob…
scsi_exit_procfs – Remove scsi/scsi and scsi from procfs Synopsis void scsi_exit_procfs(void); Arguments void no arguments Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_exit_devinfo – remove /proc/scsi/device_info & the scsi_dev_info_list Synopsis void scsi_exit_devinfo(void); Arguments void no arguments Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_execute – insert request and wait for the result Synopsis int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, int data_direction, void *buffer, unsigned bufflen, unsigned char *sense, int timeout, int retries, u64 flags, int *resid); Arguments sdev scsi device cmd scsi command data_direction data direction buffer data buffer bufflen len of buffer sense optional sense…
scsi_eh_restore_cmnd – Restore a scsi command info as part of error recovery Synopsis void scsi_eh_restore_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses); Arguments scmd SCSI command structure to restore ses saved information from a coresponding call to scsi_eh_prep_cmnd Description Undo any damage done by above scsi_eh_prep_cmnd. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at]…
scsi_eh_ready_devs – check device ready state and recover if not. Synopsis void scsi_eh_ready_devs(struct Scsi_Host *shost, struct list_head *work_q, struct list_head *done_q); Arguments shost host to be recovered. work_q list_head for pending commands. done_q list_head for processed commands. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_eh_prep_cmnd – Save a scsi command info as part of error recovery Synopsis void scsi_eh_prep_cmnd(struct scsi_cmnd *scmd, struct scsi_eh_save *ses, unsigned char *cmnd, int cmnd_size, unsigned sense_bytes); Arguments scmd SCSI command structure to hijack ses structure to save restore information cmnd CDB to send. Can be NULL if no new cmnd is needed cmnd_size size…
scsi_eh_get_sense – Get device sense data. Synopsis int scsi_eh_get_sense(struct list_head *work_q, struct list_head *done_q); Arguments work_q Queue of commands to process. done_q Queue of processed commands. Description See if we need to request sense information. if so, then get it now, so we have a better idea of what to do. Notes This has the…
scsi_eh_flush_done_q – finish processed commands or retry them. Synopsis void scsi_eh_flush_done_q(struct list_head *done_q); Arguments done_q list_head of processed commands. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_eh_finish_cmd – Handle a cmd that eh is finished with. Synopsis void scsi_eh_finish_cmd(struct scsi_cmnd *scmd, struct list_head *done_q); Arguments scmd Original SCSI cmd that eh has finished. done_q Queue for processed commands. Notes We don’t want to use the normal command completion while we are are still handling errors – it may cause other commands…
scsi_dma_unmap – unmap command’s sg lists mapped by scsi_dma_map Synopsis void scsi_dma_unmap(struct scsi_cmnd *cmd); Arguments cmd scsi command Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_dma_map – perform DMA mapping against command’s sg lists Synopsis int scsi_dma_map(struct scsi_cmnd *cmd); Arguments cmd scsi command Description Returns the number of sg lists actually used, zero if the sg lists is NULL, or -ENOMEM if the mapping failed. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
scsi_device_supports_vpd – test if a device supports VPD pages Synopsis int scsi_device_supports_vpd(struct scsi_device *sdev); Arguments sdev the struct scsi_device to test Description If the ‘try_vpd_pages’ flag is set it takes precedence. Otherwise we will assume VPD pages are supported if the SCSI level is at least SPC-3 and ‘skip_vpd_pages’ is not set. Authors James Bottomley…
scsi_device_set_state – Take the given device through the device state model. Synopsis int scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state); Arguments sdev scsi device to change the state of. state state to change to. Description Returns zero if unsuccessful or an error if the requested transition is illegal. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob…
scsi_device_resume – Restart user issued commands to a quiesced device. Synopsis void scsi_device_resume(struct scsi_device *sdev); Arguments sdev scsi device to resume. Description Moves the device from quiesced back to running and restarts the queues. Must be called with user context, may sleep. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author….
scsi_device_quiesce – Block user issued commands. Synopsis int scsi_device_quiesce(struct scsi_device *sdev); Arguments sdev scsi device to quiesce. Description This works by trying to transition to the SDEV_QUIESCE state (which must be a legal transition). When the device is in this state, only special requests will be accepted, all others will be deferred. Since special requests…