diff options
Diffstat (limited to 'drivers/s390/crypto/ap_bus.h')
| -rw-r--r-- | drivers/s390/crypto/ap_bus.h | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h index 936541937e15..5246cd8c16a6 100644 --- a/drivers/s390/crypto/ap_bus.h +++ b/drivers/s390/crypto/ap_bus.h @@ -1,4 +1,4 @@ -// SPDX-License-Identifier: GPL-2.0+ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright IBM Corp. 2006, 2012 * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com> @@ -117,9 +117,18 @@ enum ap_wait { struct ap_device; struct ap_message; +/* + * The ap driver struct includes a flags field which holds some info for + * the ap bus about the driver. Currently only one flag is supported and + * used: The DEFAULT flag marks an ap driver as a default driver which is + * used together with the apmask and aqmask whitelisting of the ap bus. + */ +#define AP_DRIVER_FLAG_DEFAULT 0x0001 + struct ap_driver { struct device_driver driver; struct ap_device_id *ids; + unsigned int flags; int (*probe)(struct ap_device *); void (*remove)(struct ap_device *); @@ -167,7 +176,7 @@ struct ap_queue { int pendingq_count; /* # requests on pendingq list. */ int requestq_count; /* # requests on requestq list. */ int total_request_count; /* # requests ever for this AP device.*/ - int request_timeout; /* Request timout in jiffies. */ + int request_timeout; /* Request timeout in jiffies. */ struct timer_list timeout; /* Timer for request timeouts. */ struct list_head pendingq; /* List of message sent to AP queue. */ struct list_head requestq; /* List of message yet to be sent. */ @@ -248,4 +257,27 @@ void ap_queue_resume(struct ap_device *ap_dev); struct ap_card *ap_card_create(int id, int queue_depth, int raw_device_type, int comp_device_type, unsigned int functions); +/* + * check APQN for owned/reserved by ap bus and default driver(s). + * Checks if this APQN is or will be in use by the ap bus + * and the default set of drivers. + * If yes, returns 1, if not returns 0. On error a negative + * errno value is returned. + */ +int ap_owned_by_def_drv(int card, int queue); + +/* + * check 'matrix' of APQNs for owned/reserved by ap bus and + * default driver(s). + * Checks if there is at least one APQN in the given 'matrix' + * marked as owned/reserved by the ap bus and default driver(s). + * If such an APQN is found the return value is 1, otherwise + * 0 is returned. On error a negative errno value is returned. + * The parameter apm is a bitmask which should be declared + * as DECLARE_BITMAP(apm, AP_DEVICES), the aqm parameter is + * similar, should be declared as DECLARE_BITMAP(aqm, AP_DOMAINS). + */ +int ap_apqn_in_matrix_owned_by_def_drv(unsigned long *apm, + unsigned long *aqm); + #endif /* _AP_BUS_H_ */ |