On Thu, Jan 19, 2017 at 08:51:30AM -0700, Alex Williamson wrote:
> Intel 200-series chipsets have the same errata as 100-series, the ACS
> capability doesn't follow the PCIe spec, the capability and control
> registers are dwords rather than words. Add PCIe root port device IDs
> to existing quirk.
>
> Signed-off-by: Alex Williamson <[email protected]>
Applied to pci/virtualization for v4.11, thanks, Alex!
> ---
> drivers/pci/quirks.c | 28 ++++++++++++++++++++++++----
> 1 file changed, 24 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 1800bef..a0b3cd5 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -4150,15 +4150,35 @@ static int pci_quirk_intel_pch_acs(struct pci_dev
> *dev, u16 acs_flags)
> *
> * N.B. This doesn't fix what lspci shows.
> *
> + * The 100 series chipset specification update includes this as errata
> #23[3].
> + *
> + * The 200 series chipset (Union Point) has the same bug according to the
> + * specification update (Intel 200 Series Chipset Family Platform Controller
> + * Hub, Specification Update, January 2017, Revision 001, Document#
> 335194-001,
> + * Errata 22)[4]. Per the datasheet[5], root port PCI Device IDs for this
> + * chipset include:
> + *
> + * 0xa290-0xa29f PCI Express Root port #{0-16}
> + * 0xa2e7-0xa2ee PCI Express Root port #{17-24}
> + *
> * [1]
> http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-2.html
> * [2]
> http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-datasheet-vol-1.html
> + * [3]
> http://www.intel.com/content/www/us/en/chipsets/100-series-chipset-spec-update.html
> + * [4]
> http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-spec-update.html
> + * [5]
> http://www.intel.com/content/www/us/en/chipsets/200-series-chipset-pch-datasheet-vol-1.html
> */
> static bool pci_quirk_intel_spt_pch_acs_match(struct pci_dev *dev)
> {
> - return pci_is_pcie(dev) &&
> - pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT &&
> - ((dev->device & ~0xf) == 0xa110 ||
> - (dev->device >= 0xa167 && dev->device <= 0xa16a));
> + if (!pci_is_pcie(dev) || pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT)
> + return false;
> +
> + switch (dev->device) {
> + case 0xa110 ... 0xa11f: case 0xa167 ... 0xa16a: /* Sunrise Point */
> + case 0xa290 ... 0xa29f: case 0xa2e7 ... 0xa2ee: /* Union Point */
> + return true;
> + }
> +
> + return false;
> }
>
> #define INTEL_SPT_ACS_CTRL (PCI_ACS_CAP + 4)
>
> --
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