On 21/03/2019 15:52, Sinan Kaya wrote:
> On 3/20/2019 1:36 PM, Jean-Philippe Brucker wrote:
>> pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS);
>> + if (!pos)
>> + return -ENOSYS;
>> +
>
> You don't need this. pci_enable_ats() validates this via.
>
> if (!dev->ats_cap)
>
On 3/20/2019 1:36 PM, Jean-Philippe Brucker wrote:
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_ATS);
+ if (!pos)
+ return -ENOSYS;
+
You don't need this. pci_enable_ats() validates this via.
if (!dev->ats_cap)
return -EINVAL;
___
PCIe devices can implement their own TLB, named Address Translation Cache
(ATC). Enable Address Translation Service (ATS) for devices that support
it and send them invalidation requests whenever we invalidate the IOTLBs.
ATC invalidation is allowed to take up to 90 seconds, according to the
PCIe s
