| Message ID | 20240930171232.1668-2-jdamato@fastly.com (mailing list archive) |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | e1000/e1000e: Link IRQs, NAPIs, and queues | expand |
On Mon, Sep 30, 2024 at 05:12:31PM +0000, Joe Damato wrote: > Add support for netdev-genl, allowing users to query IRQ, NAPI, and queue > information. > > After this patch is applied, note the IRQs assigned to my NIC: > > $ cat /proc/interrupts | grep ens | cut -f1 --delimiter=':' > 50 > 51 > 52 > > While e1000e allocates 3 IRQs (RX, TX, and other), it looks like e1000e > only has a single NAPI, so I've associated the NAPI with the RX IRQ (50 > on my system, seen above). > > Note the output from the cli: > > $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > --dump napi-get --json='{"ifindex": 2}' > [{'id': 145, 'ifindex': 2, 'irq': 50}] > > This device supports only 1 rx and 1 tx queue. so querying that: > > $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > --dump queue-get --json='{"ifindex": 2}' > [{'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'rx'}, > {'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'tx'}] > > Signed-off-by: Joe Damato <jdamato@fastly.com> Reviewed-by: Simon Horman <horms@kernel.org>
On 30/09/2024 20:12, Joe Damato wrote: > Add support for netdev-genl, allowing users to query IRQ, NAPI, and queue > information. > > After this patch is applied, note the IRQs assigned to my NIC: > > $ cat /proc/interrupts | grep ens | cut -f1 --delimiter=':' > 50 > 51 > 52 > > While e1000e allocates 3 IRQs (RX, TX, and other), it looks like e1000e > only has a single NAPI, so I've associated the NAPI with the RX IRQ (50 > on my system, seen above). > > Note the output from the cli: > > $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > --dump napi-get --json='{"ifindex": 2}' > [{'id': 145, 'ifindex': 2, 'irq': 50}] > > This device supports only 1 rx and 1 tx queue. so querying that: > > $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ > --dump queue-get --json='{"ifindex": 2}' > [{'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'rx'}, > {'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'tx'}] > > Signed-off-by: Joe Damato <jdamato@fastly.com> > --- > drivers/net/ethernet/intel/e1000e/netdev.c | 11 +++++++++++ > 1 file changed, 11 insertions(+) > Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index f103249b12fa..b527642c3a82 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -4613,6 +4613,7 @@ int e1000e_open(struct net_device *netdev) struct e1000_hw *hw = &adapter->hw; struct pci_dev *pdev = adapter->pdev; int err; + int irq; /* disallow open during test */ if (test_bit(__E1000_TESTING, &adapter->state)) @@ -4676,7 +4677,15 @@ int e1000e_open(struct net_device *netdev) /* From here on the code is the same as e1000e_up() */ clear_bit(__E1000_DOWN, &adapter->state); + if (adapter->int_mode == E1000E_INT_MODE_MSIX) + irq = adapter->msix_entries[0].vector; + else + irq = adapter->pdev->irq; + + netif_napi_set_irq(&adapter->napi, irq); napi_enable(&adapter->napi); + netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_RX, &adapter->napi); + netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_TX, &adapter->napi); e1000_irq_enable(adapter); @@ -4735,6 +4744,8 @@ int e1000e_close(struct net_device *netdev) netdev_info(netdev, "NIC Link is Down\n"); } + netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_RX, NULL); + netif_queue_set_napi(netdev, 0, NETDEV_QUEUE_TYPE_TX, NULL); napi_disable(&adapter->napi); e1000e_free_tx_resources(adapter->tx_ring);
Add support for netdev-genl, allowing users to query IRQ, NAPI, and queue information. After this patch is applied, note the IRQs assigned to my NIC: $ cat /proc/interrupts | grep ens | cut -f1 --delimiter=':' 50 51 52 While e1000e allocates 3 IRQs (RX, TX, and other), it looks like e1000e only has a single NAPI, so I've associated the NAPI with the RX IRQ (50 on my system, seen above). Note the output from the cli: $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ --dump napi-get --json='{"ifindex": 2}' [{'id': 145, 'ifindex': 2, 'irq': 50}] This device supports only 1 rx and 1 tx queue. so querying that: $ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \ --dump queue-get --json='{"ifindex": 2}' [{'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'rx'}, {'id': 0, 'ifindex': 2, 'napi-id': 145, 'type': 'tx'}] Signed-off-by: Joe Damato <jdamato@fastly.com> --- drivers/net/ethernet/intel/e1000e/netdev.c | 11 +++++++++++ 1 file changed, 11 insertions(+)