> -----Original Message----- > From: Xiaowei Bao <[email protected]> > Sent: 2020年3月22日 19:13 > To: M.h. Lian <[email protected]>; Z.q. Hou > <[email protected]>; Mingkai Hu <[email protected]>; > [email protected]; [email protected]; > [email protected] > Cc: Xiaowei Bao <[email protected]> > Subject: [PATCH 5/9] pci_ep: layerscape: Add the workaround for errata > A-009460 > > The VF_BARn_REG register's Prefetchable and Type bit fields are overwritten > by a write to VF's BAR Mask register. > workaround: Before writing to the VF_BARn_MASK_REG register, write 0b to > the PCIE_MISC_CONTROL_1_OFF register. > > Signed-off-by: Xiaowei Bao <[email protected]> > --- > drivers/pci/pcie_layerscape_ep.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/pci/pcie_layerscape_ep.c > b/drivers/pci/pcie_layerscape_ep.c > index bec374b..a2b18ad 100644 > --- a/drivers/pci/pcie_layerscape_ep.c > +++ b/drivers/pci/pcie_layerscape_ep.c > @@ -163,6 +163,15 @@ static void ls_pcie_setup_ep(struct ls_pcie_ep > *pcie_ep) > if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { > pcie_ep->sriov_flag = 1; > for (pf = 0; pf < PCIE_PF_NUM; pf++) { > + /* > + * The VF_BARn_REG register's Prefetchable and Type bit > + * fields are overwritten by a write to VF's BAR Mask > + * register. Before writing to the VF_BARn_MASK_REG > + * register, write 0b to the PCIE_MISC_CONTROL_1_OFF > + * register. > + */ > + writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF); > + > if (pcie_ep->cfg2_flag) { > for (vf = 0; vf <= PCIE_VF_NUM; vf++) { > ctrl_writel(pcie, > -- > 2.9.5 Reviewed-by: Hou Zhiqiang <[email protected]>
