From 90f87fb5258c57bbb8497ac23454e659169483e4 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Sun, 9 Jun 2019 03:50:53 +0200 Subject: [PATCH] pci: imx: Fix potential 64bit memory access clamping The driver limits the config space base to 32bit, however it can be 64bit on 64bit iMX hardware too. Remove that limitation. This patch has no impact on the iMX6, which is the only SoC currently supported by this driver. Signed-off-by: Marek Vasut Cc: Bin Meng Cc: Fabio Estevam Cc: Stefano Babic Reviewed-by: Bin Meng --- drivers/pci/pcie_imx.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c index 173636f..76f9e06 100644 --- a/drivers/pci/pcie_imx.c +++ b/drivers/pci/pcie_imx.c @@ -307,9 +307,11 @@ static int imx_pcie_regions_setup(void) /* Region #0 is used for Outbound CFG space access. */ writel(0, priv->dbi_base + PCIE_ATU_VIEWPORT); - writel((u32)priv->cfg_base, priv->dbi_base + PCIE_ATU_LOWER_BASE); - writel(0, priv->dbi_base + PCIE_ATU_UPPER_BASE); - writel((u32)priv->cfg_base + MX6_ROOT_SIZE, + writel(lower_32_bits((uintptr_t)priv->cfg_base), + priv->dbi_base + PCIE_ATU_LOWER_BASE); + writel(upper_32_bits((uintptr_t)priv->cfg_base), + priv->dbi_base + PCIE_ATU_UPPER_BASE); + writel(lower_32_bits((uintptr_t)priv->cfg_base + MX6_ROOT_SIZE), priv->dbi_base + PCIE_ATU_LIMIT); writel(0, priv->dbi_base + PCIE_ATU_LOWER_TARGET); @@ -323,9 +325,9 @@ static int imx_pcie_regions_setup(void) /* * PCI Express accessors */ -static uint32_t get_bus_address(pci_dev_t d, int where) +static void __iomem *get_bus_address(pci_dev_t d, int where) { - uint32_t va_address; + void __iomem *va_address; /* Reconfigure Region #0 */ writel(0, priv->dbi_base + PCIE_ATU_VIEWPORT); @@ -336,10 +338,10 @@ static uint32_t get_bus_address(pci_dev_t d, int where) writel(PCIE_ATU_TYPE_CFG1, priv->dbi_base + PCIE_ATU_CR1); if (PCI_BUS(d) == 0) { - va_address = (u32)priv->dbi_base; + va_address = priv->dbi_base; } else { writel(d << 8, priv->dbi_base + PCIE_ATU_LOWER_TARGET); - va_address = (u32)priv->cfg_base; + va_address = priv->cfg_base; } va_address += (where & ~0x3); @@ -390,7 +392,7 @@ static void imx_pcie_fix_dabt_handler(bool set) static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d, int where, u32 *val) { - uint32_t va_address; + void __iomem *va_address; int ret; ret = imx_pcie_addr_valid(d); @@ -419,7 +421,7 @@ static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d, static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d, int where, u32 val) { - uint32_t va_address = 0; + void __iomem *va_address = NULL; int ret; ret = imx_pcie_addr_valid(d); -- 2.7.4