diff options
Diffstat (limited to 'drivers/s390/cio/qdio.h')
| -rw-r--r-- | drivers/s390/cio/qdio.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index f0037eefd44e..0f4ef8769a3d 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -208,6 +208,7 @@ struct qdio_dev_perf_stat { unsigned int eqbs_partial; unsigned int sqbs; unsigned int sqbs_partial; + unsigned int int_discarded; } ____cacheline_aligned; struct qdio_queue_perf_stat { @@ -222,6 +223,10 @@ struct qdio_queue_perf_stat { unsigned int nr_sbal_total; }; +enum qdio_queue_irq_states { + QDIO_QUEUE_IRQS_DISABLED, +}; + struct qdio_input_q { /* input buffer acknowledgement flag */ int polling; @@ -231,6 +236,10 @@ struct qdio_input_q { int ack_count; /* last time of noticing incoming data */ u64 timestamp; + /* upper-layer polling flag */ + unsigned long queue_irq_state; + /* callback to start upper-layer polling */ + void (*queue_start_poll) (struct ccw_device *, int, unsigned long); }; struct qdio_output_q { @@ -399,6 +408,26 @@ static inline int multicast_outbound(struct qdio_q *q) #define sub_buf(bufnr, dec) \ ((bufnr - dec) & QDIO_MAX_BUFFERS_MASK) +#define queue_irqs_enabled(q) \ + (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) == 0) +#define queue_irqs_disabled(q) \ + (test_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state) != 0) + +#define TIQDIO_SHARED_IND 63 + +/* device state change indicators */ +struct indicator_t { + u32 ind; /* u32 because of compare-and-swap performance */ + atomic_t count; /* use count, 0 or 1 for non-shared indicators */ +}; + +extern struct indicator_t *q_indicators; + +static inline int shared_ind(struct qdio_irq *irq_ptr) +{ + return irq_ptr->dsci == &q_indicators[TIQDIO_SHARED_IND].ind; +} + /* prototypes for thin interrupt */ void qdio_setup_thinint(struct qdio_irq *irq_ptr); int qdio_establish_thinint(struct qdio_irq *irq_ptr); |