Re: [Qemu-devel] Re: [PATCH 00/10] pci: pci_register_bar_simple

[Blue Swirl <blauwirbel@gmail.com>]

On Mon, Apr 4, 2011 at 7:35 PM, Avi Kivity <avi@redhat.com> wrote:
> On 04/04/2011 07:22 PM, Anthony Liguori wrote:
>>
>> On 04/04/2011 10:59 AM, Michael S. Tsirkin wrote:
>>>
>>> On Mon, Apr 04, 2011 at 06:27:57PM +0300, Avi Kivity wrote:
>>>>
>>>> Many PCI BARs that use the memory address space map a single MMIO region
>>>> into
>>>> the entire BAR range.  Introduce an API pci_register_bar_simple() for
>>>> that use
>>>> case, and convert all users where this can be done trivially.
>>>>
>>>> This will reduce the work required to introduce a PCI memory API; it's
>>>> also
>>>> a nice code reduction in its own right.
>>>
>>> This will save some code, so
>>> Acked-by: Michael S. Tsirkin<mst@redhat.com>
>>>
>>> I really hope the rest of devices will follow.
>>
>> How complete is this?
>
> I converted all devices which were easy to convert.  There may be one or two
> more that can be converted with additional work (and perhaps with an
> additional pic_bar_get_current_address() API, and a pci_bar_set_coalescing()
> API).  The rest likely need to stick with the callback-based API.

In my version which I sent earlier but didn't commit, also other BARs
besides the first one and also tricky devices like VGA were handled.

But I didn't commit it because I felt it was not going to right
direction. I think the BARs should be specified in PCIDeviceInfo
instead of adding more function calls. The same applies to this patch
set.