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 <xiaowei....@nxp.com>
---
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
