From: Richard Henderson <rth@twiddle.net>
To: Avi Kivity <avi@redhat.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
mst@redhat.com, aliguori@us.ibm.com, david@gibson.dropbear.id.au,
kvm@vger.kernel.org, aik@ozlabs.ru, joro@8bytes.org,
seabios@seabios.org, qemu-devel@nongnu.org, agraf@suse.de,
blauwirbel@gmail.com, yamahata@valinux.co.jp, kevin@koconnor.net,
dwg@au1.ibm.com, paul@codesourcery.com
Subject: Re: [Qemu-devel] [RFC PATCH 01/13] Generic DMA memory access interface
Date: Wed, 01 Jun 2011 08:16:44 -0700 [thread overview]
Message-ID: <4DE657DC.3070909@twiddle.net> (raw)
In-Reply-To: <4DE64CE4.7030300@redhat.com>
On 06/01/2011 07:29 AM, Avi Kivity wrote:
> On 06/01/2011 05:01 PM, Richard Henderson wrote:
>> > + err = dev->mmu->translate(dev, addr,&paddr,&plen, is_write);
>>
>> I see you didn't take my suggestion for using an opaque callback pointer.
>> Really and truly, I won't be able to use this as-is for Alpha.
>>
>
> Rather than opaques, please pass the DMA engine itself and use container_of().
The dma engine object is currently sitting in the PCIBus structure.
Which is private, and can't be extended by a host bridge implementation.
The entire code could be re-arranged, true, but please suggest something
reasonable.
> We should be removing opaques, not adding them.
See my followup elsewhere. Opaques *can* be cleaner than upcasting,
particularly if there are too many hoops through which to jump.
r~
WARNING: multiple messages have this Message-ID (diff)
From: Richard Henderson <rth@twiddle.net>
To: Avi Kivity <avi@redhat.com>
Cc: aliguori@us.ibm.com, kvm@vger.kernel.org, mst@redhat.com,
aik@ozlabs.ru, joro@8bytes.org, seabios@seabios.org,
qemu-devel@nongnu.org, agraf@suse.de, blauwirbel@gmail.com,
yamahata@valinux.co.jp, kevin@koconnor.net,
paul@codesourcery.com,
Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
dwg@au1.ibm.com, david@gibson.dropbear.id.au
Subject: Re: [Qemu-devel] [RFC PATCH 01/13] Generic DMA memory access interface
Date: Wed, 01 Jun 2011 08:16:44 -0700 [thread overview]
Message-ID: <4DE657DC.3070909@twiddle.net> (raw)
In-Reply-To: <4DE64CE4.7030300@redhat.com>
On 06/01/2011 07:29 AM, Avi Kivity wrote:
> On 06/01/2011 05:01 PM, Richard Henderson wrote:
>> > + err = dev->mmu->translate(dev, addr,&paddr,&plen, is_write);
>>
>> I see you didn't take my suggestion for using an opaque callback pointer.
>> Really and truly, I won't be able to use this as-is for Alpha.
>>
>
> Rather than opaques, please pass the DMA engine itself and use container_of().
The dma engine object is currently sitting in the PCIBus structure.
Which is private, and can't be extended by a host bridge implementation.
The entire code could be re-arranged, true, but please suggest something
reasonable.
> We should be removing opaques, not adding them.
See my followup elsewhere. Opaques *can* be cleaner than upcasting,
particularly if there are too many hoops through which to jump.
r~
next prev parent reply other threads:[~2011-06-01 15:16 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 1:38 [RFC PATCH 00/13] AMD IOMMU emulation patches, another try Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 01/13] Generic DMA memory access interface Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 14:01 ` Richard Henderson
2011-06-01 14:01 ` Richard Henderson
2011-06-01 14:29 ` Avi Kivity
2011-06-01 14:29 ` Avi Kivity
2011-06-01 15:16 ` Richard Henderson [this message]
2011-06-01 15:16 ` Richard Henderson
2011-06-02 10:22 ` David Gibson
2011-06-02 10:22 ` David Gibson
2011-06-01 14:52 ` Eduard - Gabriel Munteanu
2011-06-01 14:52 ` Eduard - Gabriel Munteanu
2011-06-01 15:09 ` Richard Henderson
2011-06-01 15:09 ` Richard Henderson
2011-06-01 15:35 ` Eduard - Gabriel Munteanu
2011-06-01 15:35 ` Eduard - Gabriel Munteanu
2011-06-01 15:45 ` Richard Henderson
2011-06-01 15:45 ` Richard Henderson
2011-06-02 9:38 ` David Gibson
2011-06-02 9:38 ` David Gibson
2011-06-01 1:38 ` [RFC PATCH 02/13] pci: add IOMMU support via the generic DMA layer Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 03/13] AMD IOMMU emulation Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 04/13] ide: use the DMA memory access interface for PCI IDE controllers Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 05/13] rtl8139: use the DMA memory access interface Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 06/13] eepro100: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 07/13] ac97: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 08/13] es1370: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 09/13] e1000: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 10/13] lsi53c895a: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 11/13] pcnet: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 12/13] usb-uhci: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [RFC PATCH 13/13] usb-ohci: " Eduard - Gabriel Munteanu
2011-06-01 1:38 ` [Qemu-devel] " Eduard - Gabriel Munteanu
2011-06-01 18:49 ` [Qemu-devel] [RFC PATCH 00/13] AMD IOMMU emulation patches, another try Richard Henderson
2011-06-01 18:49 ` Richard Henderson
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