netdev - [PATCH net-next 01/13] igb: Link IRQs to NAPI instances

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Message-ID: <20250429234651.3982025-2-anthony.l.nguyen@intel.com>
Date: Tue, 29 Apr 2025 16:46:36 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	andrew+netdev@...n.ch,
	netdev@...r.kernel.org
Cc: Kurt Kanzenbach <kurt@...utronix.de>,
	anthony.l.nguyen@...el.com,
	bigeasy@...utronix.de,
	gerhard@...leder-embedded.com,
	jdamato@...tly.com,
	Rinitha S <sx.rinitha@...el.com>
Subject: [PATCH net-next 01/13] igb: Link IRQs to NAPI instances

From: Kurt Kanzenbach <kurt@...utronix.de>

Link IRQs to NAPI instances via netdev-genl API. This allows users to query
that information via netlink:

|$ ./tools/net/ynl/pyynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
|                               --dump napi-get --json='{"ifindex": 2}'
|[{'defer-hard-irqs': 0,
|  'gro-flush-timeout': 0,
|  'id': 8204,
|  'ifindex': 2,
|  'irq': 127,
|  'irq-suspend-timeout': 0},
| {'defer-hard-irqs': 0,
|  'gro-flush-timeout': 0,
|  'id': 8203,
|  'ifindex': 2,
|  'irq': 126,
|  'irq-suspend-timeout': 0},
| {'defer-hard-irqs': 0,
|  'gro-flush-timeout': 0,
|  'id': 8202,
|  'ifindex': 2,
|  'irq': 125,
|  'irq-suspend-timeout': 0},
| {'defer-hard-irqs': 0,
|  'gro-flush-timeout': 0,
|  'id': 8201,
|  'ifindex': 2,
|  'irq': 124,
|  'irq-suspend-timeout': 0}]
|$ cat /proc/interrupts | grep enp2s0
|123:          0          1 IR-PCI-MSIX-0000:02:00.0   0-edge      enp2s0
|124:          0          7 IR-PCI-MSIX-0000:02:00.0   1-edge      enp2s0-TxRx-0
|125:          0          0 IR-PCI-MSIX-0000:02:00.0   2-edge      enp2s0-TxRx-1
|126:          0          5 IR-PCI-MSIX-0000:02:00.0   3-edge      enp2s0-TxRx-2
|127:          0          0 IR-PCI-MSIX-0000:02:00.0   4-edge      enp2s0-TxRx-3

Reviewed-by: Joe Damato <jdamato@...tly.com>
Tested-by: Rinitha S <sx.rinitha@...el.com> (A Contingent worker at Intel)
Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index c646c71915f0..401af6dce2a8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -947,6 +947,9 @@ static int igb_request_msix(struct igb_adapter *adapter)
 				  q_vector);
 		if (err)
 			goto err_free;
+
+		netif_napi_set_irq(&q_vector->napi,
+				   adapter->msix_entries[vector].vector);
 	}
 
 	igb_configure_msix(adapter);
-- 
2.47.1