The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
ccw_device_start_key – start a s390 channel program with key Synopsis int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa, unsigned long intparm, __u8 lpm, __u8 key, unsigned long flags); Arguments cdev target ccw device cpa logical start address of channel program intparm user specific interruption parameter; will be presented back to cdev‘s interrupt handler. Allows a device…
ccw_device_start – start a s390 channel program Synopsis int ccw_device_start(struct ccw_device *cdev, struct ccw1 *cpa, unsigned long intparm, __u8 lpm, unsigned long flags); Arguments cdev target ccw device cpa logical start address of channel program intparm user specific interruption parameter; will be presented back to cdev‘s interrupt handler. Allows a device driver to associate the…
ccw_device_siosl – initiate logging Synopsis int ccw_device_siosl(struct ccw_device *cdev); Arguments cdev ccw device Description This function is used to invoke model-dependent logging within the channel subsystem. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_set_options_mask – set some options and unset the rest Synopsis int ccw_device_set_options_mask(struct ccw_device *cdev, unsigned long flags); Arguments cdev device for which the options are to be set flags options to be set Description All flags specified in flags are set, all flags not specified in flags are cleared. Return 0 on success, –EINVAL on…
ccw_device_set_options – set some options Synopsis int ccw_device_set_options(struct ccw_device *cdev, unsigned long flags); Arguments cdev device for which the options are to be set flags options to be set Description All flags specified in flags are set, the remainder is left untouched. Return 0 on success, –EINVAL if an invalid flag combination would ensue. Author…
ccw_device_set_online – enable a ccw device for I/O Synopsis int ccw_device_set_online(struct ccw_device *cdev); Arguments cdev target ccw device Description This function first enables cdev and then calls the driver’s set_online function for cdev, if given. If set_online returns an error, cdev is disabled again. Return 0 on success and a negative error value on failure….
ccw_device_set_offline – disable a ccw device for I/O Synopsis int ccw_device_set_offline(struct ccw_device *cdev); Arguments cdev target ccw device Description This function calls the driver’s set_offline function for cdev, if given, and then disables cdev. Return 0 on success and a negative error value on failure. Context enabled, ccw device lock not held Author Cornelia Huck…
ccw_device_resume – resume channel program execution Synopsis int ccw_device_resume(struct ccw_device *cdev); Arguments cdev target ccw device Description ccw_device_resume calls rsch on cdev‘s subchannel. Return 0 on success, –ENODEV on device not operational, –EINVAL on invalid device state, –EBUSY on device busy or interrupt pending. Context Interrupts disabled, ccw device lock held Author Cornelia Huck <cornelia.huck…
ccw_device_is_pathgroup – determine if paths to this device are grouped Synopsis int ccw_device_is_pathgroup(struct ccw_device *cdev); Arguments cdev ccw device Description Return non-zero if there is a path group, zero otherwise. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_is_multipath – determine if device is operating in multipath mode Synopsis int ccw_device_is_multipath(struct ccw_device *cdev); Arguments cdev ccw device Description Return non-zero if device is operating in multipath mode, zero otherwise. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_halt – halt I/O request processing Synopsis int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm); Arguments cdev target ccw device intparm interruption parameter; value is only used if no I/O is outstanding, otherwise the intparm associated with the I/O request is returned Description ccw_device_halt calls hsch on cdev‘s subchannel. Return 0 on success, –ENODEV on device…
ccw_device_get_schid – obtain a subchannel id Synopsis void ccw_device_get_schid(struct ccw_device *cdev, struct subchannel_id *schid); Arguments cdev device to obtain the id for schid where to fill in the values Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_get_path_mask – get currently available paths Synopsis __u8 ccw_device_get_path_mask(struct ccw_device * cdev); Arguments cdev ccw device to be queried Return 0 if no subchannel for the device is available, else the mask of currently available paths for the ccw device’s subchannel. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_get_mdc – accumulate max data count Synopsis int ccw_device_get_mdc(struct ccw_device *cdev, u8 mask); Arguments cdev ccw device for which the max data count is accumulated mask mask of paths to use Description Return the number of 64K-bytes blocks all paths at least support for a transport command. Return values <= 0 indicate failures. Author Cornelia…
ccw_device_get_id – obtain a ccw device id Synopsis void ccw_device_get_id(struct ccw_device *cdev, struct ccw_dev_id *dev_id); Arguments cdev device to obtain the id for dev_id where to fill in the values Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_get_ciw – Search for CIW command in extended sense data. Synopsis struct ciw *ccw_device_get_ciw(struct ccw_device *cdev, __u32 ct); Arguments cdev ccw device to inspect ct command type to look for Description During SenseID, command information words (CIWs) describing special commands available to the device may have been stored in the extended sense data. This function…
ccw_device_get_chp_desc – return newly allocated channel-path descriptor Synopsis struct channel_path_desc *ccw_device_get_chp_desc(struct ccw_device *cdev, int chp_idx); Arguments cdev device to obtain the descriptor for chp_idx index of the channel path Description On success return a newly allocated copy of the channel-path description data associated with the given channel path. Return NULL on error. Author Cornelia Huck…
ccw_device_clear_options – clear some options Synopsis void ccw_device_clear_options(struct ccw_device *cdev, unsigned long flags); Arguments cdev device for which the options are to be cleared flags options to be cleared Description All flags specified in flags are cleared, the remainder is left untouched. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_clear – terminate I/O request processing Synopsis int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm); Arguments cdev target ccw device intparm interruption parameter; value is only used if no I/O is outstanding, otherwise the intparm associated with the I/O request is returned Description ccw_device_clear calls csch on cdev‘s subchannel. Return 0 on success, –ENODEV on device…
ccw_dev_id_is_equal – compare two ccw_dev_ids Synopsis int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, struct ccw_dev_id *dev_id2); Arguments dev_id1 a ccw_dev_id dev_id2 another ccw_dev_id Return 1 if the two structures are equal field-by-field, 0 if not. Context any Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright