[PATCH v4 06/12] PCI: dwc: Add reset_all_bars flag

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Some PCIe endpoint drivers reset all BARs in each ep_init() ops.
So, we can reset the BARs into the common code if the flag is set.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c | 10 ++++++++++
 drivers/pci/controller/dwc/pcie-designware.h    |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 9a47448026d7..1271978b0a17 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -83,6 +83,14 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
 }
 EXPORT_SYMBOL_GPL(dw_pcie_ep_reset_bar);
 
+static void dw_pcie_ep_reset_all_bars(struct dw_pcie *pci)
+{
+	enum pci_barno bar;
+
+	for (bar = BAR_0; bar < PCI_STD_NUM_BARS; bar++)
+		dw_pcie_ep_reset_bar(pci, bar);
+}
+
 static u8 __dw_pcie_ep_find_next_cap(struct dw_pcie_ep *ep, u8 func_no,
 		u8 cap_ptr, u8 cap)
 {
@@ -751,6 +759,8 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 
 	if (ep->ops->ep_init)
 		ep->ops->ep_init(ep);
+	if (ep->reset_all_bars)
+		dw_pcie_ep_reset_all_bars(pci);
 
 	ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
 			       ep->page_size);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 0fc96c7cb15c..ba1cdcb120aa 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -322,6 +322,7 @@ struct dw_pcie_ep {
 	void __iomem		*msi_mem;
 	phys_addr_t		msi_mem_phys;
 	struct pci_epf_bar	*epf_bar[PCI_STD_NUM_BARS];
+	bool			reset_all_bars;
 };
 
 struct dw_pcie_ops {
-- 
2.25.1




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