On 2/7/2019 1:41 PM, sathyanarayanan.kuppusw...@linux.intel.com 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.
Can you please check the spec?
