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Message-Id: <20241014213012.187976-2-jdamato@fastly.com>
Date: Mon, 14 Oct 2024 21:30:10 +0000
From: Joe Damato <jdamato@...tly.com>
To: netdev@...r.kernel.org
Cc: kurt@...utronix.de,
vinicius.gomes@...el.com,
Joe Damato <jdamato@...tly.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
Przemek Kitszel <przemyslaw.kitszel@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
intel-wired-lan@...ts.osuosl.org (moderated list:INTEL ETHERNET DRIVERS),
linux-kernel@...r.kernel.org (open list)
Subject: [RFC net-next v2 1/2] igc: Link IRQs to NAPI instances
Link IRQs to NAPI instances via netdev-genl API so that users can query
this information with netlink.
Compare the output of /proc/interrupts (noting that IRQ 144 is the
"other" IRQ which does not appear to have a NAPI instance):
$ cat /proc/interrupts | grep enp86s0 | cut --delimiter=":" -f1
144
145
146
147
148
The output from netlink shows the mapping of NAPI IDs to IRQs (again
noting that 144 is absent as it is the "other" IRQ):
$ ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/netdev.yaml \
--dump napi-get --json='{"ifindex": 2}'
[{'id': 8196, 'ifindex': 2, 'irq': 148},
{'id': 8195, 'ifindex': 2, 'irq': 147},
{'id': 8194, 'ifindex': 2, 'irq': 146},
{'id': 8193, 'ifindex': 2, 'irq': 145}]
Signed-off-by: Joe Damato <jdamato@...tly.com>
---
v2:
- Line wrap at 80 characters
drivers/net/ethernet/intel/igc/igc_main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 6e70bca15db1..7964bbedb16c 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -5576,6 +5576,9 @@ static int igc_request_msix(struct igc_adapter *adapter)
q_vector);
if (err)
goto err_free;
+
+ netif_napi_set_irq(&q_vector->napi,
+ adapter->msix_entries[vector].vector);
}
igc_configure_msix(adapter);
--
2.25.1
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