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authorJan Glauber <jang@linux.vnet.ibm.com>2008-12-25 13:38:47 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:59 +0100
commit50f769df1c4bea766c4eb927eae35728fb93e305 (patch)
treec86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_debug.c
parent22f9934767f49012ffbae753b28b8055bd28348f (diff)
[S390] qdio: improve inbound buffer acknowledgement
- Use automatic acknowledgement of incoming buffers in QEBSM mode - Move ACK for non-QEBSM mode always to the newest buffer to prevent a race with qdio_stop_polling - Remove the polling spinlock, the upper layer drivers return new buffers in the same code path and could not run in parallel - Don't flood the error log in case of no-target-buffer-empty - In handle_inbound we check if we would overwrite an ACK'ed buffer, if so advance the pointer to the oldest ACK'ed buffer so we don't overwrite an empty buffer in qdio_stop_polling Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/qdio_debug.c')
-rw-r--r--drivers/s390/cio/qdio_debug.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index 0add07c1b5d..f8a3b6967f6 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -60,16 +60,18 @@ static int qstat_show(struct seq_file *m, void *v)
if (!q)
return 0;
- seq_printf(m, "device state indicator: %d\n", *q->irq_ptr->dsci);
+ seq_printf(m, "device state indicator: %d\n", *(u32 *)q->irq_ptr->dsci);
seq_printf(m, "nr_used: %d\n", atomic_read(&q->nr_buf_used));
seq_printf(m, "ftc: %d\n", q->first_to_check);
seq_printf(m, "last_move_ftc: %d\n", q->last_move_ftc);
seq_printf(m, "polling: %d\n", q->u.in.polling);
+ seq_printf(m, "ack count: %d\n", q->u.in.ack_count);
seq_printf(m, "slsb buffer states:\n");
+ seq_printf(m, "|0 |8 |16 |24 |32 |40 |48 |56 63|\n");
qdio_siga_sync_q(q);
for (i = 0; i < QDIO_MAX_BUFFERS_PER_Q; i++) {
- get_buf_state(q, i, &state);
+ get_buf_state(q, i, &state, 0);
switch (state) {
case SLSB_P_INPUT_NOT_INIT:
case SLSB_P_OUTPUT_NOT_INIT:
@@ -101,6 +103,7 @@ static int qstat_show(struct seq_file *m, void *v)
seq_printf(m, "\n");
}
seq_printf(m, "\n");
+ seq_printf(m, "|64 |72 |80 |88 |96 |104 |112 | 127|\n");
return 0;
}