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path: root/drivers/s390/cio/qdio.h
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Diffstat (limited to 'drivers/s390/cio/qdio.h')
-rw-r--r--drivers/s390/cio/qdio.h92
1 files changed, 56 insertions, 36 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 44f2f6a97f33..48aa0647432b 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -208,18 +208,27 @@ struct qdio_dev_perf_stat {
unsigned int eqbs_partial;
unsigned int sqbs;
unsigned int sqbs_partial;
+} ____cacheline_aligned;
+
+struct qdio_queue_perf_stat {
+ /*
+ * Sorted into order-2 buckets: 1, 2-3, 4-7, ... 64-127, 128.
+ * Since max. 127 SBALs are scanned reuse entry for 128 as queue full
+ * aka 127 SBALs found.
+ */
+ unsigned int nr_sbals[8];
+ unsigned int nr_sbal_error;
+ unsigned int nr_sbal_nop;
+ unsigned int nr_sbal_total;
};
struct qdio_input_q {
/* input buffer acknowledgement flag */
int polling;
-
/* first ACK'ed buffer */
int ack_start;
-
/* how much sbals are acknowledged with qebsm */
int ack_count;
-
/* last time of noticing incoming data */
u64 timestamp;
};
@@ -227,40 +236,27 @@ struct qdio_input_q {
struct qdio_output_q {
/* PCIs are enabled for the queue */
int pci_out_enabled;
-
/* IQDIO: output multiple buffers (enhanced SIGA) */
int use_enh_siga;
-
/* timer to check for more outbound work */
struct timer_list timer;
};
+/*
+ * Note on cache alignment: grouped slsb and write mostly data at the beginning
+ * sbal[] is read-only and starts on a new cacheline followed by read mostly.
+ */
struct qdio_q {
struct slsb slsb;
+
union {
struct qdio_input_q in;
struct qdio_output_q out;
} u;
- /* queue number */
- int nr;
-
- /* bitmask of queue number */
- int mask;
-
- /* input or output queue */
- int is_input_q;
-
- /* list of thinint input queues */
- struct list_head entry;
-
- /* upper-layer program handler */
- qdio_handler_t (*handler);
-
/*
* inbound: next buffer the program should check for
- * outbound: next buffer to check for having been processed
- * by the card
+ * outbound: next buffer to check if adapter processed it
*/
int first_to_check;
@@ -273,16 +269,32 @@ struct qdio_q {
/* number of buffers in use by the adapter */
atomic_t nr_buf_used;
- struct qdio_irq *irq_ptr;
- struct dentry *debugfs_q;
- struct tasklet_struct tasklet;
-
/* error condition during a data transfer */
unsigned int qdio_error;
- struct sl *sl;
- struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q];
+ struct tasklet_struct tasklet;
+ struct qdio_queue_perf_stat q_stats;
+
+ struct qdio_buffer *sbal[QDIO_MAX_BUFFERS_PER_Q] ____cacheline_aligned;
+
+ /* queue number */
+ int nr;
+
+ /* bitmask of queue number */
+ int mask;
+
+ /* input or output queue */
+ int is_input_q;
+
+ /* list of thinint input queues */
+ struct list_head entry;
+ /* upper-layer program handler */
+ qdio_handler_t (*handler);
+
+ struct dentry *debugfs_q;
+ struct qdio_irq *irq_ptr;
+ struct sl *sl;
/*
* Warning: Leave this member at the end so it won't be cleared in
* qdio_fill_qs. A page is allocated under this pointer and used for
@@ -317,12 +329,8 @@ struct qdio_irq {
struct qdio_ssqd_desc ssqd_desc;
void (*orig_handler) (struct ccw_device *, unsigned long, struct irb *);
- struct qdio_dev_perf_stat perf_stat;
int perf_stat_enabled;
- /*
- * Warning: Leave these members together at the end so they won't be
- * cleared in qdio_setup_irq.
- */
+
struct qdr *qdr;
unsigned long chsc_page;
@@ -331,6 +339,7 @@ struct qdio_irq {
debug_info_t *debug_area;
struct mutex setup_mutex;
+ struct qdio_dev_perf_stat perf_stat;
};
/* helper functions */
@@ -341,9 +350,20 @@ struct qdio_irq {
(irq->qib.qfmt == QDIO_IQDIO_QFMT || \
css_general_characteristics.aif_osa)
-#define qperf(qdev,attr) qdev->perf_stat.attr
-#define qperf_inc(q,attr) if (q->irq_ptr->perf_stat_enabled) \
- q->irq_ptr->perf_stat.attr++
+#define qperf(__qdev, __attr) ((__qdev)->perf_stat.(__attr))
+
+#define qperf_inc(__q, __attr) \
+({ \
+ struct qdio_irq *qdev = (__q)->irq_ptr; \
+ if (qdev->perf_stat_enabled) \
+ (qdev->perf_stat.__attr)++; \
+})
+
+static inline void account_sbals_error(struct qdio_q *q, int count)
+{
+ q->q_stats.nr_sbal_error += count;
+ q->q_stats.nr_sbal_total += count;
+}
/* the highest iqdio queue is used for multicast */
static inline int multicast_outbound(struct qdio_q *q)