PCI: dwc: tegra: Use pci_ops for root config space accessors

Now that DWC drivers can setup their own pci_ops for the root and child
buses, convert the Tegra driver to use the standard pci_ops for root
bus config accesses.

Link: https://lore.kernel.org/r/20200821035420.380495-8-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-tegra@vger.kernel.org

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 7049868..b723c9f 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -568,42 +568,44 @@ static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg)
        return IRQ_HANDLED;
 }
 
-static int tegra_pcie_dw_rd_own_conf(struct pcie_port *pp, int where, int size,
-                                    u32 *val)
+static int tegra_pcie_dw_rd_own_conf(struct pci_bus *bus, u32 devfn, int where,
+                                    int size, u32 *val)
 {
-       struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
        /*
         * This is an endpoint mode specific register happen to appear even
         * when controller is operating in root port mode and system hangs
         * when it is accessed with link being in ASPM-L1 state.
         * So skip accessing it altogether
         */
-       if (where == PORT_LOGIC_MSIX_DOORBELL) {
+       if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) {
                *val = 0x00000000;
                return PCIBIOS_SUCCESSFUL;
        }
 
-       return dw_pcie_read(pci->dbi_base + where, size, val);
+       return pci_generic_config_read(bus, devfn, where, size, val);
 }
 
-static int tegra_pcie_dw_wr_own_conf(struct pcie_port *pp, int where, int size,
-                                    u32 val)
+static int tegra_pcie_dw_wr_own_conf(struct pci_bus *bus, u32 devfn, int where,
+                                    int size, u32 val)
 {
-       struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
        /*
         * This is an endpoint mode specific register happen to appear even
         * when controller is operating in root port mode and system hangs
         * when it is accessed with link being in ASPM-L1 state.
         * So skip accessing it altogether
         */
-       if (where == PORT_LOGIC_MSIX_DOORBELL)
+       if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL)
                return PCIBIOS_SUCCESSFUL;
 
-       return dw_pcie_write(pci->dbi_base + where, size, val);
+       return pci_generic_config_write(bus, devfn, where, size, val);
 }
 
+static struct pci_ops tegra_pci_ops = {
+       .map_bus = dw_pcie_own_conf_map_bus,
+       .read = tegra_pcie_dw_rd_own_conf,
+       .write = tegra_pcie_dw_wr_own_conf,
+};
+
 #if defined(CONFIG_PCIEASPM)
 static void disable_aspm_l11(struct tegra_pcie_dw *pcie)
 {
@@ -970,6 +972,8 @@ static int tegra_pcie_dw_host_init(struct pcie_port *pp)
        struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
        u32 val, tmp, offset, speed;
 
+       pp->bridge->ops = &tegra_pci_ops;
+
        tegra_pcie_prepare_host(pp);
 
        if (dw_pcie_wait_for_link(pci)) {
@@ -1057,8 +1061,6 @@ static const struct dw_pcie_ops tegra_dw_pcie_ops = {
 };
 
 static struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
-       .rd_own_conf = tegra_pcie_dw_rd_own_conf,
-       .wr_own_conf = tegra_pcie_dw_wr_own_conf,
        .host_init = tegra_pcie_dw_host_init,
        .set_num_vectors = tegra_pcie_set_msi_vec_num,
 };