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-rw-r--r--drivers/s390/net/qeth_core.h15
-rw-r--r--drivers/s390/net/qeth_core_main.c20
-rw-r--r--drivers/s390/net/qeth_ethtool.c75
3 files changed, 102 insertions, 8 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index f56670bfcd0a..a6553e78af08 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -459,6 +459,7 @@ struct qeth_out_q_stats {
u64 packing_mode_switch;
u64 stopped;
u64 doorbell;
+ u64 coal_frames;
u64 completion_yield;
u64 completion_timer;
@@ -469,6 +470,8 @@ struct qeth_out_q_stats {
u64 tx_dropped;
};
+#define QETH_TX_MAX_COALESCED_FRAMES 1
+#define QETH_TX_COALESCE_USECS 25
#define QETH_TX_TIMER_USECS 500
struct qeth_qdio_out_q {
@@ -492,9 +495,13 @@ struct qeth_qdio_out_q {
struct napi_struct napi;
struct timer_list timer;
struct qeth_hdr *prev_hdr;
+ unsigned int coalesced_frames;
u8 bulk_start;
u8 bulk_count;
u8 bulk_max;
+
+ unsigned int coalesce_usecs;
+ unsigned int max_coalesced_frames;
};
#define qeth_for_each_output_queue(card, q, i) \
@@ -503,12 +510,10 @@ struct qeth_qdio_out_q {
#define qeth_napi_to_out_queue(n) container_of(n, struct qeth_qdio_out_q, napi)
-static inline void qeth_tx_arm_timer(struct qeth_qdio_out_q *queue)
+static inline void qeth_tx_arm_timer(struct qeth_qdio_out_q *queue,
+ unsigned long usecs)
{
- if (timer_pending(&queue->timer))
- return;
- mod_timer(&queue->timer, usecs_to_jiffies(QETH_TX_TIMER_USECS) +
- jiffies);
+ timer_reduce(&queue->timer, usecs_to_jiffies(usecs) + jiffies);
}
static inline bool qeth_out_queue_is_full(struct qeth_qdio_out_q *queue)
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 108dd9a34f30..0c9f1464a778 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -2404,6 +2404,8 @@ static int qeth_alloc_qdio_queues(struct qeth_card *card)
queue->card = card;
queue->queue_no = i;
timer_setup(&queue->timer, qeth_tx_completion_timer, 0);
+ queue->coalesce_usecs = QETH_TX_COALESCE_USECS;
+ queue->max_coalesced_frames = QETH_TX_MAX_COALESCED_FRAMES;
/* give outbound qeth_qdio_buffers their qdio_buffers */
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
@@ -2762,6 +2764,7 @@ static int qeth_init_qdio_queues(struct qeth_card *card)
queue->next_buf_to_fill = 0;
queue->do_pack = 0;
queue->prev_hdr = NULL;
+ queue->coalesced_frames = 0;
queue->bulk_start = 0;
queue->bulk_count = 0;
queue->bulk_max = qeth_tx_select_bulk_max(card, queue);
@@ -3357,6 +3360,7 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
buf = queue->bufs[bidx];
buf->buffer->element[buf->next_element_to_fill - 1].eflags |=
SBAL_EFLAGS_LAST_ENTRY;
+ queue->coalesced_frames += buf->frames;
if (queue->bufstates)
queue->bufstates[bidx].user = buf;
@@ -3401,8 +3405,18 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
queue->queue_no, index, count);
/* Fake the TX completion interrupt: */
- if (IS_IQD(card))
- napi_schedule(&queue->napi);
+ if (IS_IQD(card)) {
+ unsigned int frames = READ_ONCE(queue->max_coalesced_frames);
+ unsigned int usecs = READ_ONCE(queue->coalesce_usecs);
+
+ if (frames && queue->coalesced_frames >= frames) {
+ napi_schedule(&queue->napi);
+ queue->coalesced_frames = 0;
+ QETH_TXQ_STAT_INC(queue, coal_frames);
+ } else if (usecs) {
+ qeth_tx_arm_timer(queue, usecs);
+ }
+ }
if (rc) {
/* ignore temporary SIGA errors without busy condition */
@@ -5667,7 +5681,7 @@ static int qeth_tx_poll(struct napi_struct *napi, int budget)
if (completed <= 0) {
/* Ensure we see TX completion for pending work: */
if (napi_complete_done(napi, 0))
- qeth_tx_arm_timer(queue);
+ qeth_tx_arm_timer(queue, QETH_TX_TIMER_USECS);
return 0;
}
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
index 6f0cc6fcc759..ebdc03210608 100644
--- a/drivers/s390/net/qeth_ethtool.c
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -40,6 +40,7 @@ static const struct qeth_stats txq_stats[] = {
QETH_TXQ_STAT("Packing mode switches", packing_mode_switch),
QETH_TXQ_STAT("Queue stopped", stopped),
QETH_TXQ_STAT("Doorbell", doorbell),
+ QETH_TXQ_STAT("IRQ for frames", coal_frames),
QETH_TXQ_STAT("Completion yield", completion_yield),
QETH_TXQ_STAT("Completion timer", completion_timer),
};
@@ -109,6 +110,38 @@ static void qeth_get_ethtool_stats(struct net_device *dev,
txq_stats, TXQ_STATS_LEN);
}
+static void __qeth_set_coalesce(struct net_device *dev,
+ struct qeth_qdio_out_q *queue,
+ struct ethtool_coalesce *coal)
+{
+ WRITE_ONCE(queue->coalesce_usecs, coal->tx_coalesce_usecs);
+ WRITE_ONCE(queue->max_coalesced_frames, coal->tx_max_coalesced_frames);
+
+ if (coal->tx_coalesce_usecs &&
+ netif_running(dev) &&
+ !qeth_out_queue_is_empty(queue))
+ qeth_tx_arm_timer(queue, coal->tx_coalesce_usecs);
+}
+
+static int qeth_set_coalesce(struct net_device *dev,
+ struct ethtool_coalesce *coal)
+{
+ struct qeth_card *card = dev->ml_priv;
+ struct qeth_qdio_out_q *queue;
+ unsigned int i;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
+ return -EINVAL;
+
+ qeth_for_each_output_queue(card, queue, i)
+ __qeth_set_coalesce(dev, queue, coal);
+
+ return 0;
+}
+
static void qeth_get_ringparam(struct net_device *dev,
struct ethtool_ringparam *param)
{
@@ -244,6 +277,43 @@ static int qeth_set_tunable(struct net_device *dev,
}
}
+static int qeth_get_per_queue_coalesce(struct net_device *dev, u32 __queue,
+ struct ethtool_coalesce *coal)
+{
+ struct qeth_card *card = dev->ml_priv;
+ struct qeth_qdio_out_q *queue;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (__queue >= card->qdio.no_out_queues)
+ return -EINVAL;
+
+ queue = card->qdio.out_qs[__queue];
+
+ coal->tx_coalesce_usecs = queue->coalesce_usecs;
+ coal->tx_max_coalesced_frames = queue->max_coalesced_frames;
+ return 0;
+}
+
+static int qeth_set_per_queue_coalesce(struct net_device *dev, u32 queue,
+ struct ethtool_coalesce *coal)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ if (!IS_IQD(card))
+ return -EOPNOTSUPP;
+
+ if (queue >= card->qdio.no_out_queues)
+ return -EINVAL;
+
+ if (!coal->tx_coalesce_usecs && !coal->tx_max_coalesced_frames)
+ return -EINVAL;
+
+ __qeth_set_coalesce(dev, card->qdio.out_qs[queue], coal);
+ return 0;
+}
+
/* Helper function to fill 'advertising' and 'supported' which are the same. */
/* Autoneg and full-duplex are supported and advertised unconditionally. */
/* Always advertise and support all speeds up to specified, and only one */
@@ -443,7 +513,10 @@ static int qeth_get_link_ksettings(struct net_device *netdev,
}
const struct ethtool_ops qeth_ethtool_ops = {
+ .supported_coalesce_params = ETHTOOL_COALESCE_TX_USECS |
+ ETHTOOL_COALESCE_TX_MAX_FRAMES,
.get_link = ethtool_op_get_link,
+ .set_coalesce = qeth_set_coalesce,
.get_ringparam = qeth_get_ringparam,
.get_strings = qeth_get_strings,
.get_ethtool_stats = qeth_get_ethtool_stats,
@@ -454,6 +527,8 @@ const struct ethtool_ops qeth_ethtool_ops = {
.get_ts_info = qeth_get_ts_info,
.get_tunable = qeth_get_tunable,
.set_tunable = qeth_set_tunable,
+ .get_per_queue_coalesce = qeth_get_per_queue_coalesce,
+ .set_per_queue_coalesce = qeth_set_per_queue_coalesce,
.get_link_ksettings = qeth_get_link_ksettings,
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-14 22:50:26 +0300