From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
commit 8bcca26585585ae4b44d25d30f351ad0afa4976b upstream.
dw_pcie_ep_init() depends on the detected iATU region numbers to allocate
the in/outbound window management bitmap. It fails after 281f1f99cf3a
("PCI: dwc: Detect number of iATU windows").
Move the iATU region detection into a new function, move the detection to
the very beginning of dw_pcie_host_init() and dw_pcie_ep_init(). Also
remove it from the dw_pcie_setup(), since it's more like a software
initialization step than hardware setup.
Link: https://lore.kernel.org/r/20210125044803.4310-1-Zhiqiang.Hou@xxxxxxx
Link: https://lore.kernel.org/linux-pci/20210407131255.702054-1-dmitry.baryshkov@xxxxxxxxxx
Link: https://lore.kernel.org/r/20210413142219.2301430-1-dmitry.baryshkov@xxxxxxxxxx
Fixes: 281f1f99cf3a ("PCI: dwc: Detect number of iATU windows")
Tested-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx>
[DB: moved dw_pcie_iatu_detect to happen after host_init callback]
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v5.11+
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 2 ++
drivers/pci/controller/dwc/pcie-designware-host.c | 1 +
drivers/pci/controller/dwc/pcie-designware.c | 11 ++++++++---
drivers/pci/controller/dwc/pcie-designware.h | 1 +
4 files changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -707,6 +707,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *e
}
}
+ dw_pcie_iatu_detect(pci);
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
if (!res)
return -EINVAL;
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -421,6 +421,7 @@ int dw_pcie_host_init(struct pcie_port *
if (ret)
goto err_free_msi;
}
+ dw_pcie_iatu_detect(pci);
dw_pcie_setup_rc(pp);
dw_pcie_msi_init(pp);
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -610,11 +610,9 @@ static void dw_pcie_iatu_detect_regions(
pci->num_ob_windows = ob;
}
-void dw_pcie_setup(struct dw_pcie *pci)
+void dw_pcie_iatu_detect(struct dw_pcie *pci)
{
- u32 val;
struct device *dev = pci->dev;
- struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
if (pci->version >= 0x480A || (!pci->version &&
@@ -643,6 +641,13 @@ void dw_pcie_setup(struct dw_pcie *pci)
dev_info(pci->dev, "Detected iATU regions: %u outbound, %u inbound",
pci->num_ob_windows, pci->num_ib_windows);
+}
+
+void dw_pcie_setup(struct dw_pcie *pci)
+{
+ u32 val;
+ struct device *dev = pci->dev;
+ struct device_node *np = dev->of_node;
if (pci->link_gen > 0)
dw_pcie_link_set_max_speed(pci, pci->link_gen);
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -304,6 +304,7 @@ int dw_pcie_prog_inbound_atu(struct dw_p
void dw_pcie_disable_atu(struct dw_pcie *pci, int index,
enum dw_pcie_region_type type);
void dw_pcie_setup(struct dw_pcie *pci);
+void dw_pcie_iatu_detect(struct dw_pcie *pci);
static inline void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
{
