diff options
Diffstat (limited to 'src/svm/svm_fifo.h')
| -rw-r--r-- | src/svm/svm_fifo.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h index aed8770b458..42efb5af6b3 100644 --- a/src/svm/svm_fifo.h +++ b/src/svm/svm_fifo.h @@ -34,7 +34,9 @@ typedef enum svm_fifo_deq_ntf_ SVM_FIFO_NO_DEQ_NOTIF = 0, /**< No notification requested */ SVM_FIFO_WANT_DEQ_NOTIF = 1, /**< Notify on dequeue */ SVM_FIFO_WANT_DEQ_NOTIF_IF_FULL = 2, /**< Notify on transition from full */ - SVM_FIFO_WANT_DEQ_NOTIF_IF_EMPTY = 4, /**< Notify on transition to empty */ + SVM_FIFO_WANT_DEQ_NOTIF_IF_EMPTY = 4, /**< Notify on transition to empty */ + SVM_FIFO_WANT_DEQ_NOTIF_IF_LEQ_THRESH = 5, /**< Notify on transition to less + than or equal threshold */ } svm_fifo_deq_ntf_t; typedef enum svm_fifo_flag_ @@ -793,7 +795,8 @@ svm_fifo_clear_deq_ntf (svm_fifo_t * f) /* Set the flag if want_notif_if_full was the only ntf requested */ f->shr->has_deq_ntf = f->shr->want_deq_ntf == SVM_FIFO_WANT_DEQ_NOTIF_IF_FULL; - svm_fifo_del_want_deq_ntf (f, SVM_FIFO_WANT_DEQ_NOTIF); + svm_fifo_del_want_deq_ntf (f, SVM_FIFO_WANT_DEQ_NOTIF | + SVM_FIFO_WANT_DEQ_NOTIF_IF_LEQ_THRESH); } /** @@ -843,9 +846,27 @@ svm_fifo_needs_deq_ntf (svm_fifo_t * f, u32 n_last_deq) if (!f->shr->has_deq_ntf && svm_fifo_is_empty (f)) return 1; } + if (want_ntf & SVM_FIFO_WANT_DEQ_NOTIF_IF_LEQ_THRESH) + { + if (!f->shr->has_deq_ntf && + (svm_fifo_max_dequeue (f) <= f->shr->deq_thresh)) + return 1; + } return 0; } +/** + * Set the fifo dequeue threshold which will be used for notifications. + * + * Note: If not set, by default threshold is zero, equivalent to + * empty. + */ +static inline void +svm_fifo_set_deq_thresh (svm_fifo_t *f, u32 thresh) +{ + f->shr->deq_thresh = thresh; +} + #endif /* __included_ssvm_fifo_h__ */ /* |