qeth: NAPI support for l2 and l3 discipline
This patch adds NAPI support to the qeth layer 2 and layer 3
discipline. It is important to understand that we can not enable/disable
IRQs as usual, we have to use the corresponding new QDIO interface.
Also to not overdraw the budget we have to stop and restart buffer
processing at any point during processing a bulk of QDIO buffers.
Having the driver NAPI enabled it is possible to turn on GRO for the
layer 3 discipline.
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 3a5a18a..7642670 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2911,6 +2911,27 @@
}
}
+void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
+ unsigned long card_ptr)
+{
+ struct qeth_card *card = (struct qeth_card *)card_ptr;
+
+ if (card->dev)
+ napi_schedule(&card->napi);
+}
+EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
+
+void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
+ unsigned int queue, int first_element, int count,
+ unsigned long card_ptr)
+{
+ struct qeth_card *card = (struct qeth_card *)card_ptr;
+
+ if (qdio_err)
+ qeth_schedule_recovery(card);
+}
+EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
+
void qeth_qdio_output_handler(struct ccw_device *ccwdev,
unsigned int qdio_error, int __queue, int first_element,
int count, unsigned long card_ptr)
@@ -3843,6 +3864,7 @@
init_data.no_output_qs = card->qdio.no_out_queues;
init_data.input_handler = card->discipline.input_handler;
init_data.output_handler = card->discipline.output_handler;
+ init_data.queue_start_poll = card->discipline.start_poll;
init_data.int_parm = (unsigned long) card;
init_data.input_sbal_addr_array = (void **) in_sbal_ptrs;
init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
@@ -4513,8 +4535,8 @@
/* 20 */{"queue 1 buffer usage"},
{"queue 2 buffer usage"},
{"queue 3 buffer usage"},
- {"rx handler time"},
- {"rx handler count"},
+ {"rx poll time"},
+ {"rx poll count"},
{"rx do_QDIO time"},
{"rx do_QDIO count"},
{"tx handler time"},