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liquidio: Disabling tasklet when NAPI is active

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Control packets are processed in tasklet when interface is down and in
NAPI when interface is up. So tasklet can be disabled when interface up
and re-enabled when interface is down.

Signed-off-by: Intiyaz Basha <intiyaz.basha@cavium.com>
Acked-by: Derek Chickles <derek.chickles@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Intiyaz Basha 2018-09-09 23:34:16 -07:00 committed by David S. Miller
parent aad06d1104
commit fe2d22b172
2 changed files with 29 additions and 1 deletions
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14
drivers/net/ethernet/cavium/liquidio/lio_main.c
View File

@ -1239,8 +1239,10 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
{
struct net_device *netdev = oct->props[ifidx].netdev;
struct lio *lio;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
struct lio *lio;
if (!netdev) {
dev_err(&oct->pci_dev->dev, "%s No netdevice ptr for index %d\n",
@ -1269,6 +1271,8 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
netif_napi_del(napi);
tasklet_enable(&oct_priv->droq_tasklet);
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
@ -1805,9 +1809,13 @@ static int liquidio_open(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
if (oct->props[lio->ifidx].napi_enabled == 0) {
tasklet_disable(&oct_priv->droq_tasklet);
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_enable(napi);
@ -1861,6 +1869,8 @@ static int liquidio_stop(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
ifstate_reset(lio, LIO_IFSTATE_RUNNING);
@ -1907,6 +1917,8 @@ static int liquidio_stop(struct net_device *netdev)
if (OCTEON_CN23XX_PF(oct))
oct->droq[0]->ops.poll_mode = 0;
tasklet_enable(&oct_priv->droq_tasklet);
}
dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);

16
drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
View File

@ -444,6 +444,8 @@ static void octeon_pci_flr(struct octeon_device *oct)
*/
static void octeon_destroy_resources(struct octeon_device *oct)
{
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct msix_entry *msix_entries;
int i;
@ -587,6 +589,8 @@ static void octeon_destroy_resources(struct octeon_device *oct)
/* Nothing to be done here either */
break;
}
tasklet_kill(&oct_priv->droq_tasklet);
}
/**
@ -652,6 +656,8 @@ static void send_rx_ctrl_cmd(struct lio *lio, int start_stop)
static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
{
struct net_device *netdev = oct->props[ifidx].netdev;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
struct lio *lio;
@ -681,6 +687,8 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
netif_napi_del(napi);
tasklet_enable(&oct_priv->droq_tasklet);
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
@ -898,9 +906,13 @@ static int liquidio_open(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
if (!oct->props[lio->ifidx].napi_enabled) {
tasklet_disable(&oct_priv->droq_tasklet);
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_enable(napi);
@ -938,6 +950,8 @@ static int liquidio_stop(struct net_device *netdev)
{
struct lio *lio = GET_LIO(netdev);
struct octeon_device *oct = lio->oct_dev;
struct octeon_device_priv *oct_priv =
(struct octeon_device_priv *)oct->priv;
struct napi_struct *napi, *n;
/* tell Octeon to stop forwarding packets to host */
@ -967,6 +981,8 @@ static int liquidio_stop(struct net_device *netdev)
oct->props[lio->ifidx].napi_enabled = 0;
oct->droq[0]->ops.poll_mode = 0;
tasklet_enable(&oct_priv->droq_tasklet);
}
cancel_delayed_work_sync(&lio->stats_wk.work);