Messages in this thread | | | Subject | Re: [PATCH v1 1/2] PCI: ATS: Add function to check ATS page aligned request status. | From | sathyanarayanan kuppuswamy <> | Date | Thu, 7 Feb 2019 14:16:13 -0800 |
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On 2/7/19 12:38 PM, Sinan Kaya wrote: > > On 2/7/2019 1:41 PM, sathyanarayanan.kuppuswamy@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. Its added in v1.1. > > Can you please check the spec? > -- Sathyanarayanan Kuppuswamy Linux kernel developer
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