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PCI: layerscape: Disable outbound windows configured by bootloader

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Disable all the outbound windows to avoid one transaction hitting multiple
outbound windows.  dw_pcie_setup_rc() will reconfigure the outbound
windows, which may conflict with windows configured by the bootloader.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Roy Zang <tie-fei.zang@freescale.com>
This commit is contained in:
Hou Zhiqiang 2017-08-28 18:52:58 +08:00 committed by Bjorn Helgaas
parent fa92dba92c
commit 4a2745d760
1 changed files with 17 additions and 0 deletions
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17
drivers/pci/dwc/pci-layerscape.c
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@ -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 outbound windows configured by the bootloader to avoid
* one transaction hitting multiple outbound windows.
* dw_pcie_setup_rc() will reconfigure 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);