drivers: pci: pcie_dw_common: add upper-limit to iATU

The 4.6 spec added an upper 32bits to the ATU limit, and since this
driver is already assuming the unrolled feature added in the 4.8
specification this really should be set.

This is causing a bug with testing against the QEMU model as it
defaults the viewports to fully open and not setting this causes
the config viewport to become most of memory (obviously stopping
the emulated system working correctly)

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>

diff --git a/drivers/pci/pcie_dw_common.c b/drivers/pci/pcie_dw_common.c
index e66fb14..9f8b016 100644 (file)
--- a/drivers/pci/pcie_dw_common.c
+++ b/drivers/pci/pcie_dw_common.c
@@ -73,6 +73,8 @@ int pcie_dw_prog_outbound_atu_unroll(struct pcie_dw *pci, int index,
                                 upper_32_bits(cpu_addr));
        dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LIMIT,
                                 lower_32_bits(cpu_addr + size - 1));
+       dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_LIMIT,
+                                upper_32_bits(cpu_addr + size - 1));
        dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET,
                                 lower_32_bits(pci_addr));
        dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,

diff --git a/drivers/pci/pcie_dw_common.h b/drivers/pci/pcie_dw_common.h
index 6b70164..e0f7796 100644 (file)
--- a/drivers/pci/pcie_dw_common.h
+++ b/drivers/pci/pcie_dw_common.h
@@ -32,6 +32,7 @@
 #define PCIE_ATU_UNR_LIMIT             0x10
 #define PCIE_ATU_UNR_LOWER_TARGET      0x14
 #define PCIE_ATU_UNR_UPPER_TARGET      0x18
+#define PCIE_ATU_UNR_UPPER_LIMIT       0x20
 
 #define PCIE_ATU_REGION_INDEX1         (0x1 << 0)
 #define PCIE_ATU_REGION_INDEX0         (0x0 << 0)