ccw_device_tm_start_timeout – perform start function Synopsis int ccw_device_tm_start_timeout(struct ccw_device *cdev, struct tcw *tcw, unsigned long intparm, u8 lpm, int expires); Arguments cdev ccw device on which to perform the start function tcw transport-command word to be started intparm user defined parameter to be passed to the interrupt handler lpm mask of paths to use expires…
ccw_device_tm_start_key – perform start function Synopsis int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw, unsigned long intparm, u8 lpm, u8 key); Arguments cdev ccw device on which to perform the start function tcw transport-command word to be started intparm user defined parameter to be passed to the interrupt handler lpm mask of paths to use key…
ccw_device_tm_start – perform start function Synopsis int ccw_device_tm_start(struct ccw_device *cdev, struct tcw *tcw, unsigned long intparm, u8 lpm); Arguments cdev ccw device on which to perform the start function tcw transport-command word to be started intparm user defined parameter to be passed to the interrupt handler lpm mask of paths to use Description Start the…
ccw_device_tm_intrg – perform interrogate function Synopsis int ccw_device_tm_intrg(struct ccw_device *cdev); Arguments cdev ccw device on which to perform the interrogate function Description Perform an interrogate function on the given ccw device. Return zero on success, non-zero otherwise. Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
ccw_device_start_timeout_key – start a s390 channel program with timeout and key Synopsis int ccw_device_start_timeout_key(struct ccw_device *cdev, struct ccw1 *cpa, unsigned long intparm, __u8 lpm, __u8 key, unsigned long flags, int expires); 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…
ccw_device_start_timeout – start a s390 channel program with timeout Synopsis int ccw_device_start_timeout(struct ccw_device *cdev, struct ccw1 *cpa, unsigned long intparm, __u8 lpm, unsigned long flags, int expires); 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_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…