From: Julian Wiedmann <jwi@linux.ibm.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>,
linux-s390 <linux-s390@vger.kernel.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Ursula Braun <ubraun@linux.ibm.com>,
Julian Wiedmann <jwi@linux.ibm.com>
Subject: [PATCH net-next 04/11] s390/qeth: allow configuration of TX queues for z/VM NICs
Date: Wed, 18 Mar 2020 13:54:48 +0100 [thread overview]
Message-ID: <20200318125455.5838-5-jwi@linux.ibm.com> (raw)
In-Reply-To: <20200318125455.5838-1-jwi@linux.ibm.com>
Add support for ETHTOOL_SCHANNELS to change the count of active
TX queues.
Since all TX queue structs are pre-allocated and -registered, we just
need to trivially adjust dev->real_num_tx_queues.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
---
drivers/s390/net/qeth_ethtool.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
index 9052c72d5b8f..19b9c8302d36 100644
--- a/drivers/s390/net/qeth_ethtool.c
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -175,6 +175,22 @@ static void qeth_get_channels(struct net_device *dev,
channels->combined_count = 0;
}
+static int qeth_set_channels(struct net_device *dev,
+ struct ethtool_channels *channels)
+{
+ struct qeth_card *card = dev->ml_priv;
+
+ if (IS_IQD(card) || !IS_VM_NIC(card))
+ return -EOPNOTSUPP;
+
+ if (channels->rx_count == 0 || channels->tx_count == 0)
+ return -EINVAL;
+ if (channels->tx_count > card->qdio.no_out_queues)
+ return -EINVAL;
+
+ return netif_set_real_num_tx_queues(dev, channels->tx_count);
+}
+
static int qeth_get_tunable(struct net_device *dev,
const struct ethtool_tunable *tuna, void *data)
{
@@ -410,6 +426,7 @@ const struct ethtool_ops qeth_ethtool_ops = {
.get_sset_count = qeth_get_sset_count,
.get_drvinfo = qeth_get_drvinfo,
.get_channels = qeth_get_channels,
+ .set_channels = qeth_set_channels,
.get_tunable = qeth_get_tunable,
.set_tunable = qeth_set_tunable,
.get_link_ksettings = qeth_get_link_ksettings,
--
2.17.1
next prev parent reply other threads:[~2020-03-18 12:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 12:54 [PATCH net-next 00/11] s390/qeth: updates 2020-03-18 Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 01/11] s390/qeth: use memory reserves to back RX buffers Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 02/11] s390/qeth: use memory reserves in TX slow path Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 03/11] s390/qeth: remove prio-queueing support for z/VM NICs Julian Wiedmann
2020-03-18 12:54 ` Julian Wiedmann [this message]
2020-03-18 12:54 ` [PATCH net-next 05/11] s390/qeth: allow configuration of TX queues for IQD devices Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 06/11] s390/qeth: balance the TX queue selection " Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 07/11] s390/qeth: add SW timestamping support " Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 08/11] s390/qeth: don't report hard-coded driver version Julian Wiedmann
2020-03-18 13:07 ` Leon Romanovsky
2020-03-18 12:54 ` [PATCH net-next 09/11] s390/qeth: add phys_to_virt() translation for AOB Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 10/11] s390/qeth: remove gratuitous NULL checks Julian Wiedmann
2020-03-18 12:54 ` [PATCH net-next 11/11] s390/qeth: use dev->reg_state Julian Wiedmann
2020-03-18 23:34 ` [PATCH net-next 00/11] s390/qeth: updates 2020-03-18 David Miller
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