diff options
author | Jan Glauber <jang@linux.vnet.ibm.com> | 2008-12-25 13:38:47 +0100 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-12-25 13:38:59 +0100 |
commit | 50f769df1c4bea766c4eb927eae35728fb93e305 (patch) | |
tree | c86228e6965de0ea84bddc2104d7dfa339e2a187 /drivers/s390/cio/qdio_debug.c | |
parent | 22f9934767f49012ffbae753b28b8055bd28348f (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.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 0add07c1b5d2..f8a3b6967f69 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; } |