On 2/7/19 12:38 PM, Sinan Kaya wrote:
On 2/7/2019 1:41 PM, sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx wrote:+ * As per PCI spec, If page aligned request bit is set, it indicates + * the untranslated address is always aligned to a 4096 byte boundary. + */ +int pci_ats_page_aligned(struct pci_dev *pdev) +{ + u16 cap; + + if (!pdev->ats_cap) + return 0; + + pci_read_config_word(pdev, pdev->ats_cap + PCI_ATS_CAP, &cap);If I remember this right, aligned request is only supported on ATS v1.1 but not supported on v1.0.
Its added in v1.1.
Can you please check the spec?
-- Sathyanarayanan Kuppuswamy Linux kernel developer
