From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> Disable all the outbound windows to avoid one transaction hitting multiple outbound windows, because the function dw_pcie_setup_rc will re-configure the outbound windows which maybe confict with the bootloader configured. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> Acked-by: Roy Zang <tie-fei.zang@xxxxxxxxxxxxx> --- V5: - No change drivers/pci/dwc/pci-layerscape.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/pci/dwc/pci-layerscape.c b/drivers/pci/dwc/pci-layerscape.c index 27234dae4cba..8b5083aedf16 100644 --- a/drivers/pci/dwc/pci-layerscape.c +++ b/drivers/pci/dwc/pci-layerscape.c @@ -35,6 +35,8 @@ #define PCIE_STRFMR1 0x71c /* Symbol Timer & Filter Mask Register1 */ #define PCIE_DBI_RO_WR_EN 0x8bc /* DBI Read-Only Write Enable Register */ +#define PCIE_IATU_NUM 6 + struct ls_pcie_drvdata { u32 lut_offset; u32 ltssm_shift; @@ -91,6 +93,14 @@ static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie) iowrite32(val, pci->dbi_base + PCIE_STRFMR1); } +static void ls_pcie_disable_outbound_atus(struct ls_pcie *pcie) +{ + int i; + + for (i = 0; i < PCIE_IATU_NUM; i++) + dw_pcie_disable_atu(pcie->pci, DW_PCIE_REGION_OUTBOUND, i); +} + static int ls1021_pcie_link_up(struct dw_pcie *pci) { u32 state; @@ -128,6 +138,13 @@ static int ls_pcie_host_init(struct pcie_port *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct ls_pcie *pcie = to_ls_pcie(pci); + /* + * Disable the outbound windows configured by bootloader to avoid + * one transaction hitting multiple outbound windows and the function + * dw_pcie_setup_rc will re-configure the outbound windows. + */ + ls_pcie_disable_outbound_atus(pcie); + iowrite32(1, pci->dbi_base + PCIE_DBI_RO_WR_EN); ls_pcie_fix_class(pcie); ls_pcie_clear_multifunction(pcie); -- 2.14.1