From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Richard Cochran <richardcochran@gmail.com>
Cc: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org,
galak@codeaurora.org, netdev@vger.kernel.org,
linux-sh@vger.kernel.org,
Mitsuhiro Kimura <mitsuhiro.kimura.kc@renesas.com>,
masaru.nagai.vx@renesas.com
Subject: Re: [PATCH resend] Renesas Ethernet AVB driver
Date: Tue, 14 Apr 2015 10:14:40 +0000 [thread overview]
Message-ID: <552CE890.3040103@cogentembedded.com> (raw)
In-Reply-To: <20150414052729.GA5179@netboy>
Hello.
On 4/14/2015 8:27 AM, Richard Cochran wrote:
>>>> This is a bit hacky. Can't your driver make sure that the HW is ready?
>>> Will look into this. Perhaps it's a remainder from when the PTP driver was
>>> separate...
>> No, we enter this mode upon closing the Ethernet device and when
>> the ring DMA sizes are changed. Seems unavoidable...
>>>>> + if (ravb_read(priv->ndev, CSR) & CSR_OPS_CONFIG)
>>>>> + return true;
>>>>> + else
>>>>> + return false;
> It is surely avoidable. The driver knows (or should know) whether or
> not the hardware has been configured or not.
So you only want to avoid the register read here?
> Thanks,
> Richard
WBR, Sergei
WARNING: multiple messages have this Message-ID (diff)
From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Richard Cochran <richardcochran@gmail.com>
Cc: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org,
galak@codeaurora.org, netdev@vger.kernel.org,
linux-sh@vger.kernel.org,
Mitsuhiro Kimura <mitsuhiro.kimura.kc@renesas.com>,
masaru.nagai.vx@renesas.com
Subject: Re: [PATCH resend] Renesas Ethernet AVB driver
Date: Tue, 14 Apr 2015 13:14:40 +0300 [thread overview]
Message-ID: <552CE890.3040103@cogentembedded.com> (raw)
In-Reply-To: <20150414052729.GA5179@netboy>
Hello.
On 4/14/2015 8:27 AM, Richard Cochran wrote:
>>>> This is a bit hacky. Can't your driver make sure that the HW is ready?
>>> Will look into this. Perhaps it's a remainder from when the PTP driver was
>>> separate...
>> No, we enter this mode upon closing the Ethernet device and when
>> the ring DMA sizes are changed. Seems unavoidable...
>>>>> + if (ravb_read(priv->ndev, CSR) & CSR_OPS_CONFIG)
>>>>> + return true;
>>>>> + else
>>>>> + return false;
> It is surely avoidable. The driver knows (or should know) whether or
> not the hardware has been configured or not.
So you only want to avoid the register read here?
> Thanks,
> Richard
WBR, Sergei
next prev parent reply other threads:[~2015-04-14 10:14 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-27 23:13 [PATCH resend] Renesas Ethernet AVB driver Sergei Shtylyov
2015-03-27 23:13 ` Sergei Shtylyov
2015-03-28 5:17 ` Lino Sanfilippo
2015-03-28 5:17 ` Lino Sanfilippo
2015-03-28 8:36 ` Richard Cochran
2015-03-28 8:36 ` Richard Cochran
2015-03-28 13:55 ` Sergei Shtylyov
2015-03-28 13:55 ` Sergei Shtylyov
2015-03-28 8:28 ` Richard Cochran
2015-03-28 8:28 ` Richard Cochran
2015-03-28 18:26 ` David Miller
2015-03-28 18:26 ` David Miller
2015-03-30 22:51 ` Sergei Shtylyov
2015-03-30 22:51 ` Sergei Shtylyov
2015-03-31 6:43 ` Richard Cochran
2015-03-31 6:43 ` Richard Cochran
2015-03-31 9:01 ` Richard Cochran
2015-03-31 9:01 ` Richard Cochran
2015-03-31 15:38 ` David Miller
2015-03-31 15:38 ` David Miller
2015-03-31 17:40 ` Sergei Shtylyov
2015-03-31 17:40 ` Sergei Shtylyov
2015-03-31 17:48 ` David Miller
2015-03-31 17:48 ` David Miller
2015-04-03 6:27 ` masaru.nagai.vx
2015-04-03 6:27 ` masaru.nagai.vx
2015-04-03 6:27 ` masaru.nagai.vx
2015-04-12 22:03 ` Sergei Shtylyov
2015-04-12 22:03 ` Sergei Shtylyov
2015-04-09 13:11 ` Bjørn Mork
2015-04-09 13:11 ` Bjørn Mork
2015-04-09 17:57 ` David Miller
2015-04-09 17:57 ` David Miller
2015-04-13 20:23 ` Sergei Shtylyov
2015-04-13 20:23 ` Sergei Shtylyov
2015-04-14 5:27 ` Richard Cochran
2015-04-14 5:27 ` Richard Cochran
2015-04-14 10:14 ` Sergei Shtylyov [this message]
2015-04-14 10:14 ` Sergei Shtylyov
2015-04-14 16:30 ` Richard Cochran
2015-04-14 16:30 ` Richard Cochran
2015-04-14 16:58 ` Sergei Shtylyov
2015-04-14 16:58 ` Sergei Shtylyov
2015-04-14 18:30 ` Richard Cochran
2015-04-14 18:30 ` Richard Cochran
2015-04-15 1:01 ` masaru.nagai.vx
2015-04-15 1:01 ` masaru.nagai.vx
2015-04-15 1:01 ` masaru.nagai.vx
2015-04-15 5:31 ` Richard Cochran
2015-04-15 5:31 ` Richard Cochran
2015-04-02 13:56 ` Ben Hutchings
2015-04-02 13:56 ` Ben Hutchings
2015-04-13 20:34 ` Sergei Shtylyov
2015-04-13 20:34 ` Sergei Shtylyov
2015-04-13 22:13 ` Lino Sanfilippo
2015-04-13 22:13 ` Lino Sanfilippo
2015-04-13 22:31 ` Ben Hutchings
2015-04-13 22:31 ` Ben Hutchings
2015-04-13 22:53 ` Lino Sanfilippo
2015-04-13 22:53 ` Lino Sanfilippo
2015-04-13 23:08 ` Ben Hutchings
2015-04-13 23:08 ` Ben Hutchings
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