From: Paolo Bonzini <pbonzini@redhat.com>
To: John Snow <jsnow@redhat.com>, qemu-devel@nongnu.org
Cc: stefanha@redhat.com, mst@redhat.com
Subject: Re: [Qemu-devel] [RFC 03/10] AHCI: Add PRD interrupt
Date: Tue, 16 Sep 2014 09:44:38 +0200 [thread overview]
Message-ID: <5417EA66.6040807@redhat.com> (raw)
In-Reply-To: <5417146E.5090603@redhat.com>
Il 15/09/2014 18:31, John Snow ha scritto:
>
>
> On 09/13/2014 03:50 PM, Paolo Bonzini wrote:
>> Il 13/09/2014 15:26, Paolo Bonzini ha scritto:
>>>>>
>>>>> + if (ad->dp_intr_req) {
>>>>> + ahci_trigger_irq(ad->hba, ad, PORT_IRQ_SG_DONE);
>>>>> + ad->dp_intr_req = 0;
>>>>> + }
>>> Is it also needed in the error case? Especially the short-PRDT case
>>> that you are adding in the next patch.
>>>
>>
>> ... and is it also needed for NCQ, albeit with a separate flag?
>>
>> Paolo
>>
>
> I had actually thought that it wasn't; due to the more asynchronous
> nature of NCQ. But... looking back at the specification, I can't find
> anywhere that explicitly says you can't use these bits for NCQ.
I suggest that you leave out this bit for a moment, so that we can get
Windows fixed.
Paolo
next prev parent reply other threads:[~2014-09-16 7:45 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-13 4:34 [Qemu-devel] [RFC 00/10] AHCI Device improvements John Snow
2014-09-13 4:34 ` [Qemu-devel] [RFC 01/10] ide: add is_write() macro for semantic consistency John Snow
2014-09-13 12:54 ` Paolo Bonzini
2014-09-13 17:01 ` John Snow
2014-09-13 4:34 ` [Qemu-devel] [RFC 02/10] AHCI: Update byte count after DMA completion John Snow
2014-09-13 13:21 ` Paolo Bonzini
2014-09-15 20:07 ` John Snow
2014-09-16 7:54 ` Paolo Bonzini
2014-09-13 4:34 ` [Qemu-devel] [RFC 03/10] AHCI: Add PRD interrupt John Snow
2014-09-13 13:26 ` Paolo Bonzini
2014-09-13 19:50 ` Paolo Bonzini
2014-09-15 16:31 ` John Snow
2014-09-16 7:44 ` Paolo Bonzini [this message]
2014-09-15 16:13 ` John Snow
2014-09-13 4:34 ` [Qemu-devel] [RFC 04/10] ide: Correct handling of malformed/short PRDTs John Snow
2014-09-13 13:23 ` Paolo Bonzini
2014-09-13 4:34 ` [Qemu-devel] [RFC 05/10] AHCI: Rename NCQFIS structure fields John Snow
2014-09-13 4:34 ` [Qemu-devel] [RFC 06/10] AHCI: Fix FIS decomposition John Snow
2014-09-13 4:34 ` [Qemu-devel] [RFC 07/10] ide/ahci: Reorder error cases in handle_cmd John Snow
2014-09-13 13:27 ` Paolo Bonzini
2014-09-13 4:34 ` [Qemu-devel] [RFC 08/10] ahci: Check cmd_fis[1] more explicitly John Snow
2014-09-13 13:26 ` Paolo Bonzini
2014-09-13 4:34 ` [Qemu-devel] [RFC 09/10] ahci: factor out FIS decomposition John Snow
2014-09-13 13:27 ` Paolo Bonzini
2014-09-13 4:34 ` [Qemu-devel] [RFC 10/10] AHCI: Fix SDB FIS Construction John Snow
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