From: Heiner Kallweit <hkallweit1@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Ioana Ciornei <ciorneiioana@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Ioana Ciornei <ioana.ciornei@nxp.com>,
Alexandru Ardelean <alexandru.ardelean@analog.com>,
Andre Edich <andre.edich@microchip.com>,
Antoine Tenart <atenart@kernel.org>,
Baruch Siach <baruch@tkos.co.il>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Dan Murphy <dmurphy@ti.com>,
Divya Koppera <Divya.Koppera@microchip.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Hauke Mehrtens <hauke@hauke-m.de>,
Jerome Brunet <jbrunet@baylibre.com>,
Kavya Sree Kotagiri <kavyasree.kotagiri@microchip.com>,
Linus Walleij <linus.walleij@linaro.org>,
Marco Felsch <m.felsch@pengutronix.de>,
Marek Vasut <marex@denx.de>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Mathias Kresin <dev@kresin.me>,
Maxim Kochetkov <fido_max@inbox.ru>,
Michael Walle <michael@walle.cc>,
Neil Armstrong <narmstrong@baylibre.com>,
Nisar Sayed <Nisar.Sayed@microchip.com>,
Oleksij Rempel <o.rempel@pengutronix.de>,
Philippe Schenker <philippe.schenker@toradex.com>,
Willy Liu <willy.liu@realtek.com>,
Yuiko Oshino <yuiko.oshino@microchip.com>
Subject: Re: [PATCH net-next 00/19] net: phy: add support for shared interrupts (part 1)
Date: Sat, 31 Oct 2020 11:18:18 +0100 [thread overview]
Message-ID: <fee0997d-f4bc-dfc3-9423-476f04218614@gmail.com> (raw)
In-Reply-To: <20201030233627.GA1054829@lunn.ch>
On 31.10.2020 00:36, Andrew Lunn wrote:
>>> - Every PHY driver gains a .handle_interrupt() implementation that, for
>>> the most part, would look like below:
>>>
>>> irq_status = phy_read(phydev, INTR_STATUS);
>>> if (irq_status < 0) {
>>> phy_error(phydev);
>>> return IRQ_NONE;
>>> }
>>>
>>> if (irq_status == 0)
>>
>> Here I have a concern, bits may be set even if the respective interrupt
>> source isn't enabled. Therefore we may falsely blame a device to have
>> triggered the interrupt. irq_status should be masked with the actually
>> enabled irq source bits.
>
> Hi Heiner
>
Hi Andrew,
> I would say that is a driver implementation detail, for each driver to
> handle how it needs to handle it. I've seen some hardware where the
> interrupt status is already masked with the interrupt enabled
> bits. I've soon other hardware where it is not.
>
Sure, I just wanted to add the comment before others simply copy and
paste this (pseudo) code. And in patch 9 (aquantia) and 18 (realtek)
it is used as is. And IIRC at least the Aquantia PHY doesn't mask
the interrupt status.
> For example code, what is listed above is O.K. The real implementation
> in a driver need knowledge of the hardware.
>
> Andrew
> .
>
Heiner
next prev parent reply other threads:[~2020-10-31 10:18 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 10:07 [PATCH net-next 00/19] net: phy: add support for shared interrupts (part 1) Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 01/19] net: phy: export phy_error and phy_trigger_machine Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 02/19] net: phy: add a shutdown procedure Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 03/19] net: phy: make .ack_interrupt() optional Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 04/19] net: phy: at803x: implement generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 05/19] net: phy: at803x: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 06/19] net: phy: mscc: use phy_trigger_machine() to notify link change Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 07/19] net: phy: mscc: implement generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 08/19] net: phy: mscc: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 09/19] net: phy: aquantia: implement generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 10/19] net: phy: aquantia: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 11/19] net: phy: broadcom: implement generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 12/19] net: phy: broadcom: remove use of ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 13/19] net: phy: cicada: implement the generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 14/19] net: phy: cicada: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 15/19] net: phy: davicom: implement generic .handle_interrupt() calback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 16/19] net: phy: davicom: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 17/19] net: phy: add genphy_handle_interrupt_no_ack() Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 18/19] net: phy: realtek: implement generic .handle_interrupt() callback Ioana Ciornei
2020-10-29 10:07 ` [PATCH net-next 19/19] net: phy: realtek: remove the use of .ack_interrupt() Ioana Ciornei
2020-10-30 21:56 ` [PATCH net-next 00/19] net: phy: add support for shared interrupts (part 1) Heiner Kallweit
2020-10-30 22:06 ` Vladimir Oltean
2020-10-30 22:33 ` Heiner Kallweit
2020-10-30 22:46 ` Vladimir Oltean
2020-10-31 5:27 ` Ioana Ciornei
2020-10-30 22:42 ` Heiner Kallweit
2020-10-30 23:36 ` Andrew Lunn
2020-10-31 5:22 ` Ioana Ciornei
2020-10-31 10:18 ` Heiner Kallweit [this message]
2020-10-31 10:57 ` Ioana Ciornei
2020-10-31 14:32 ` Andrew Lunn
2020-10-31 14:51 ` Ioana Ciornei
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