diff options
Diffstat (limited to 'drivers/ptp/ptp_private.h')
| -rw-r--r-- | drivers/ptp/ptp_private.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/ptp/ptp_private.h b/drivers/ptp/ptp_private.h index 6b97155148f1..77918a2c6701 100644 --- a/drivers/ptp/ptp_private.h +++ b/drivers/ptp/ptp_private.h @@ -18,6 +18,7 @@ #define PTP_MAX_TIMESTAMPS 128 #define PTP_BUF_TIMESTAMPS 30 +#define PTP_DEFAULT_MAX_VCLOCKS 20 struct timestamp_event_queue { struct ptp_extts_event buf[PTP_MAX_TIMESTAMPS]; @@ -46,6 +47,26 @@ struct ptp_clock { const struct attribute_group *pin_attr_groups[2]; struct kthread_worker *kworker; struct kthread_delayed_work aux_work; + unsigned int max_vclocks; + unsigned int n_vclocks; + int *vclock_index; + struct mutex n_vclocks_mux; /* protect concurrent n_vclocks access */ + bool is_virtual_clock; + bool has_cycles; +}; + +#define info_to_vclock(d) container_of((d), struct ptp_vclock, info) +#define cc_to_vclock(d) container_of((d), struct ptp_vclock, cc) +#define dw_to_vclock(d) container_of((d), struct ptp_vclock, refresh_work) + +struct ptp_vclock { + struct ptp_clock *pclock; + struct ptp_clock_info info; + struct ptp_clock *clock; + struct hlist_node vclock_hash_node; + struct cyclecounter cc; + struct timecounter tc; + spinlock_t lock; /* protects tc/cc */ }; /* @@ -61,6 +82,33 @@ static inline int queue_cnt(struct timestamp_event_queue *q) return cnt < 0 ? PTP_MAX_TIMESTAMPS + cnt : cnt; } +/* Check if ptp virtual clock is in use */ +static inline bool ptp_vclock_in_use(struct ptp_clock *ptp) +{ + bool in_use = false; + + if (mutex_lock_interruptible(&ptp->n_vclocks_mux)) + return true; + + if (!ptp->is_virtual_clock && ptp->n_vclocks) + in_use = true; + + mutex_unlock(&ptp->n_vclocks_mux); + + return in_use; +} + +/* Check if ptp clock shall be free running */ +static inline bool ptp_clock_freerun(struct ptp_clock *ptp) +{ + if (ptp->has_cycles) + return false; + + return ptp_vclock_in_use(ptp); +} + +extern struct class *ptp_class; + /* * see ptp_chardev.c */ @@ -89,4 +137,6 @@ extern const struct attribute_group *ptp_groups[]; int ptp_populate_pin_groups(struct ptp_clock *ptp); void ptp_cleanup_pin_groups(struct ptp_clock *ptp); +struct ptp_vclock *ptp_vclock_register(struct ptp_clock *pclock); +void ptp_vclock_unregister(struct ptp_vclock *vclock); #endif |