On Mon, Sep 16, 2019 at 10:17:40AM +0800, Xiaowei Bao wrote: > Errata: unsupported request error on inbound posted write > transaction, PCIe controller reports advisory error instead > of uncorrectable error message to RC. > > Signed-off-by: Xiaowei Bao <xiaowei.bao@xxxxxxx> > --- > drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c | 13 +++++++++++++ > drivers/pci/controller/mobiveil/pcie-mobiveil.h | 4 ++++ > 2 files changed, 17 insertions(+) > > diff --git a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c > index 7bfec51..5bc9ed7 100644 > --- a/drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c > +++ b/drivers/pci/controller/mobiveil/pcie-layerscape-gen4-ep.c > @@ -49,6 +49,19 @@ static void ls_pcie_g4_ep_init(struct mobiveil_pcie_ep *ep) > struct mobiveil_pcie *mv_pci = to_mobiveil_pcie_from_ep(ep); > int win_idx; > u8 bar; > + u32 val; > + > + /* > + * Errata: unsupported request error on inbound posted write > + * transaction, PCIe controller reports advisory error instead > + * of uncorrectable error message to RC. > + * workaround: set the bit20(unsupported_request_Error_severity) with > + * value 1 in uncorrectable_Error_Severity_Register, make the > + * unsupported request error generate the fatal error. > + */ > + val = csr_readl(mv_pci, CFG_UNCORRECTABLE_ERROR_SEVERITY); > + val |= 1 << UNSUPPORTED_REQUEST_ERROR_SHIFT; BIT(UNSUPPORTED_REQUEST_ERROR_SHIFT) ? > + csr_writel(mv_pci, val, CFG_UNCORRECTABLE_ERROR_SEVERITY); > > ep->bar_num = PCIE_LX2_BAR_NUM; > > diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h > index 7308fa4..a40707e 100644 > --- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h > +++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h > @@ -123,6 +123,10 @@ > #define GPEX_BAR_SIZE_UDW 0x4DC > #define GPEX_BAR_SELECT 0x4E0 > > +#define CFG_UNCORRECTABLE_ERROR_SEVERITY 0x10c > +#define UNSUPPORTED_REQUEST_ERROR_SHIFT 20 > +#define CFG_UNCORRECTABLE_ERROR_MASK 0x108 > + > /* starting offset of INTX bits in status register */ > #define PAB_INTX_START 5 > > -- > 2.9.5 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
