diff mbox series

[net-next,11/12] e1000e: Link NAPI instances to queues and IRQs

Message ID 20241008233441.928802-12-anthony.l.nguyen@intel.com (mailing list archive)
State Accepted
Commit c6b8cd69912847a292c242a272efd6e9d09e9088
Delegated to: Netdev Maintainers
Headers show
Series Intel Wired LAN Driver Updates 2024-10-08 (ice, iavf, igb, e1000e, e1000) | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 6 this patch: 6
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 4 of 4 maintainers
netdev/build_clang success Errors and warnings before: 6 this patch: 6
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 5 this patch: 5
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 30 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 35 this patch: 35
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-10-10--03-00 (tests: 773)

Commit Message

Tony Nguyen Oct. 8, 2024, 11:34 p.m. UTC 
From: Joe Damato <jdamato@fastly.com>

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>
Acked-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Tested-by: Avigail Dahan <avigailx.dahan@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 9c9d4cb7c735..3be78c872a1c 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4607,6 +4607,7 @@  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))
@@ -4670,7 +4671,15 @@  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);
 
@@ -4729,6 +4738,8 @@  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);