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authorJulian Wiedmann <jwi@linux.ibm.com>2019-08-23 11:48:52 +0200
committerDavid S. Miller <davem@davemloft.net>2019-08-24 16:39:19 -0700
commit96bd6c94bdf9de38b0fa0ec679fe40013f1c4576 (patch)
treef6289212b6d30f3bce62270525d4037086913374 /drivers/s390
parent85e537d8f1b6b1201ced628b124b3d08436f5a04 (diff)
downloadlinux-96bd6c94bdf9de38b0fa0ec679fe40013f1c4576.tar.bz2
s390/qeth: add BQL support for IQD devices
Each TX buffer may contain multiple skbs. So just accumulate the sent byte count in the buffer struct, and later use the same count when completing the buffer. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core.h1
-rw-r--r--drivers/s390/net/qeth_core_main.c16
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index ae2ae17e3e76..d5f796380cd0 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -426,6 +426,7 @@ struct qeth_qdio_out_buffer {
struct qdio_buffer *buffer;
atomic_t state;
int next_element_to_fill;
+ unsigned int bytes;
struct sk_buff_head skb_list;
int is_header[QDIO_MAX_ELEMENTS_PER_BUFFER];
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 70c7e675431e..4c7c7d320c9c 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1142,6 +1142,7 @@ static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
qeth_scrub_qdio_buffer(buf->buffer, queue->max_elements);
buf->next_element_to_fill = 0;
+ buf->bytes = 0;
atomic_set(&buf->state, QETH_QDIO_BUF_EMPTY);
}
@@ -2673,6 +2674,7 @@ int qeth_init_qdio_queues(struct qeth_card *card)
atomic_set(&queue->used_buffers, 0);
atomic_set(&queue->set_pci_flags_count, 0);
atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
+ netdev_tx_reset_queue(netdev_get_tx_queue(card->dev, i));
}
return 0;
}
@@ -3790,6 +3792,7 @@ static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
{
int index = queue->next_buf_to_fill;
struct qeth_qdio_out_buffer *buffer = queue->bufs[index];
+ unsigned int bytes = qdisc_pkt_len(skb);
struct netdev_queue *txq;
bool stopped = false;
@@ -3811,6 +3814,9 @@ static int qeth_do_send_packet_fast(struct qeth_qdio_out_q *queue,
}
qeth_fill_buffer(queue, buffer, skb, hdr, offset, hd_len, stopped);
+ netdev_tx_sent_queue(txq, bytes);
+ buffer->bytes += bytes;
+
qeth_flush_buffers(queue, index, 1);
if (stopped && !qeth_out_queue_is_full(queue))
@@ -5186,6 +5192,8 @@ static int qeth_tx_poll(struct napi_struct *napi, int budget)
while (1) {
unsigned int start, error, i;
+ unsigned int packets = 0;
+ unsigned int bytes = 0;
int completed;
if (qeth_out_queue_is_empty(queue)) {
@@ -5211,13 +5219,19 @@ static int qeth_tx_poll(struct napi_struct *napi, int budget)
}
for (i = start; i < start + completed; i++) {
+ struct qeth_qdio_out_buffer *buffer;
unsigned int bidx = QDIO_BUFNR(i);
- qeth_handle_send_error(card, queue->bufs[bidx], error);
+ buffer = queue->bufs[bidx];
+ packets += skb_queue_len(&buffer->skb_list);
+ bytes += buffer->bytes;
+
+ qeth_handle_send_error(card, buffer, error);
qeth_iqd_tx_complete(queue, bidx, error, budget);
qeth_cleanup_handled_pending(queue, bidx, false);
}
+ netdev_tx_completed_queue(txq, packets, bytes);
atomic_sub(completed, &queue->used_buffers);
work_done += completed;