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s390/qeth: when in TX NAPI mode, use napi_consume_skb() 

This allows the stack to bulk-free our TX-completed skbs.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-08-23 11:48:51 +02:00 committed by David S. Miller
parent e53edf743d
commit 85e537d8f1
1 changed files with 13 additions and 11 deletions
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24
drivers/s390/net/qeth_core_main.c
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@ -71,7 +71,8 @@ static void qeth_free_qdio_queues(struct qeth_card *card);
static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf,
enum iucv_tx_notify notification);
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error);
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
int budget);
static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
static void qeth_close_dev_handler(struct work_struct *work)
@ -411,7 +412,7 @@ static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
/* release here to avoid interleaving between
outbound tasklet and inbound tasklet
regarding notifications and lifecycle */
qeth_tx_complete_buf(c, forced_cleanup);
qeth_tx_complete_buf(c, forced_cleanup, 0);
c = f->next_pending;
WARN_ON_ONCE(head->next_pending != f);
@ -1077,7 +1078,8 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
}
}
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error)
static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
int budget)
{
struct qeth_qdio_out_q *queue = buf->q;
struct sk_buff *skb;
@ -1115,13 +1117,13 @@ static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error)
}
}
consume_skb(skb);
napi_consume_skb(skb, budget);
}
}
static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
struct qeth_qdio_out_buffer *buf,
bool error)
bool error, int budget)
{
int i;
@ -1129,7 +1131,7 @@ static void qeth_clear_output_buffer(struct qeth_qdio_out_q *queue,
if (buf->buffer->element[0].sflags & SBAL_SFLAGS0_PCI_REQ)
atomic_dec(&queue->set_pci_flags_count);
qeth_tx_complete_buf(buf, error);
qeth_tx_complete_buf(buf, error, budget);
for (i = 0; i < queue->max_elements; ++i) {
if (buf->buffer->element[i].addr && buf->is_header[i])
@ -1151,7 +1153,7 @@ static void qeth_drain_output_queue(struct qeth_qdio_out_q *q, bool free)
if (!q->bufs[j])
continue;
qeth_cleanup_handled_pending(q, j, 1);
qeth_clear_output_buffer(q, q->bufs[j], true);
qeth_clear_output_buffer(q, q->bufs[j], true, 0);
if (free) {
kmem_cache_free(qeth_qdio_outbuf_cache, q->bufs[j]);
q->bufs[j] = NULL;
@ -3471,7 +3473,7 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
int bidx = i % QDIO_MAX_BUFFERS_PER_Q;
buffer = queue->bufs[bidx];
qeth_handle_send_error(card, buffer, qdio_error);
qeth_clear_output_buffer(queue, buffer, qdio_error);
qeth_clear_output_buffer(queue, buffer, qdio_error, 0);
}
atomic_sub(count, &queue->used_buffers);
@ -5138,7 +5140,7 @@ out:
EXPORT_SYMBOL_GPL(qeth_poll);
static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
unsigned int bidx, bool error)
unsigned int bidx, bool error, int budget)
{
struct qeth_qdio_out_buffer *buffer = queue->bufs[bidx];
u8 sflags = buffer->buffer->element[15].sflags;
@ -5168,7 +5170,7 @@ static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
if (card->options.cq == QETH_CQ_ENABLED)
qeth_notify_skbs(queue, buffer,
qeth_compute_cq_notification(sflags, 0));
qeth_clear_output_buffer(queue, buffer, error);
qeth_clear_output_buffer(queue, buffer, error, budget);
}
static int qeth_tx_poll(struct napi_struct *napi, int budget)
@ -5212,7 +5214,7 @@ static int qeth_tx_poll(struct napi_struct *napi, int budget)
unsigned int bidx = QDIO_BUFNR(i);
qeth_handle_send_error(card, queue->bufs[bidx], error);
qeth_iqd_tx_complete(queue, bidx, error);
qeth_iqd_tx_complete(queue, bidx, error, budget);
qeth_cleanup_handled_pending(queue, bidx, false);
}