[PATCH v3 1/3] arm/pci: allow designware-based hosts to have private data

[Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>]

Introduce an additional private data field in `dw_pcie_priv` to allow
vendors to store custom data without interfering with bridge->priv.
Also add get/set pair to make accesing that private data less
cumbersome.

Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
v2->v3:
* no changes

v1->v2:
* add Stefano's AB
---
 xen/arch/arm/pci/pci-designware.c | 12 ++++++++++++
 xen/arch/arm/pci/pci-designware.h |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/xen/arch/arm/pci/pci-designware.c 
b/xen/arch/arm/pci/pci-designware.c
index 47dd2dd4c0..0bd67524ac 100644
--- a/xen/arch/arm/pci/pci-designware.c
+++ b/xen/arch/arm/pci/pci-designware.c
@@ -403,3 +403,15 @@ dw_pcie_host_probe(struct dt_device_node *dev, const void 
*data,
 
     return bridge;
 }
+
+void *dw_pcie_get_priv(struct pci_host_bridge *bridge)
+{
+    struct dw_pcie_priv *priv = bridge->priv;
+    return priv->priv;
+}
+
+void dw_pcie_set_priv(struct pci_host_bridge *bridge, void *other)
+{
+    struct dw_pcie_priv *priv = bridge->priv;
+    priv->priv = other;
+}
diff --git a/xen/arch/arm/pci/pci-designware.h 
b/xen/arch/arm/pci/pci-designware.h
index 7efb1dc9a2..b9deb3b138 100644
--- a/xen/arch/arm/pci/pci-designware.h
+++ b/xen/arch/arm/pci/pci-designware.h
@@ -66,8 +66,12 @@ struct dw_pcie_priv {
     bool iatu_unroll_enabled;
     void __iomem *atu_base;
     unsigned int version;
+    void *priv;
 };
 
+void *dw_pcie_get_priv(struct pci_host_bridge *bridge);
+void dw_pcie_set_priv(struct pci_host_bridge *bridge, void *other);
+
 void dw_pcie_set_version(struct pci_host_bridge *bridge, unsigned int version);
 
 void __iomem *dw_pcie_child_map_bus(struct pci_host_bridge *bridge,
-- 
2.34.1