[PATCH 03/13] PCI: xilinx: Convert to MSI domains

[Michal Simek]

Hi,

On 3/22/21 1:21 PM, Lorenzo Pieralisi wrote:
> On Thu, Feb 25, 2021 at 03:10:13PM +0000, Marc Zyngier wrote:
>> In anticipation of the removal of the msi_controller structure, convert
>> the ancient xilinx host controller driver to MSI domains.
>>
>> We end-up with the usual two domain structure, the top one being a
>> generic PCI/MSI domain, the bottom one being xilinx-specific and handling
>> the actual HW interrupt allocation.
>>
>> This allows us to fix some of the most appaling MSI programming, where
>> the message programmed in the device is the virtual IRQ number instead
>> of the allocated vector number. The allocator is also made safe with
>> a mutex. This should allow support for MultiMSI, but I decided not to
>> even try, since I cannot test it.
>>
>> Also take the opportunity to get rid of the cargo-culted memory allocation
>> for the MSI capture address. *ANY* sufficiently aligned address should
>> be good enough, so use the physical address of the xilinx_pcie_host
>> structure instead.
>>
>> Signed-off-by: Marc Zyngier <maz at kernel.org>
>> ---
>>  drivers/pci/controller/Kconfig       |   2 +-
>>  drivers/pci/controller/pcie-xilinx.c | 238 +++++++++++----------------
>>  2 files changed, 96 insertions(+), 144 deletions(-)
> 
> Michal,
> 
> can you please test these changes or make sure someone does and report
> back on the mailing list please ?
> 
> I would like to merge this series for v5.13.

I got just private response (not sure why) from Bharat March 5 that
changes are fine.
It means go ahead with it.

Thanks,
Michal