[PATCH v1 07/14] xen/arm: Add support for Xilinx ZynqMP PCI host controller

[Rahul Singh <rahul.singh@xxxxxxx>]

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>

Add support for Xilinx ZynqMP PCI host controller to map the PCI config
space to the XEN memory.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
---
 xen/arch/arm/pci/Makefile          |  1 +
 xen/arch/arm/pci/pci-host-zynqmp.c | 59 ++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 xen/arch/arm/pci/pci-host-zynqmp.c

diff --git a/xen/arch/arm/pci/Makefile b/xen/arch/arm/pci/Makefile
index 6f32fbbe67..1d045ade01 100644
--- a/xen/arch/arm/pci/Makefile
+++ b/xen/arch/arm/pci/Makefile
@@ -3,3 +3,4 @@ obj-y += pci-access.o
 obj-y += pci-host-generic.o
 obj-y += pci-host-common.o
 obj-y += ecam.o
+obj-y += pci-host-zynqmp.o
diff --git a/xen/arch/arm/pci/pci-host-zynqmp.c 
b/xen/arch/arm/pci/pci-host-zynqmp.c
new file mode 100644
index 0000000000..fe103e3855
--- /dev/null
+++ b/xen/arch/arm/pci/pci-host-zynqmp.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2020-2021 EPAM Systems
+ *
+ * Based on Linux drivers/pci/controller/pci-host-common.c
+ * Based on Linux drivers/pci/controller/pci-host-generic.c
+ * Based on xen/arch/arm/pci/pci-host-generic.c
+ * Copyright (C) 2014 ARM Limited Will Deacon <will.deacon@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <asm/device.h>
+#include <xen/pci.h>
+#include <asm/pci.h>
+
+static const struct dt_device_match gen_pci_dt_match[] = {
+    { .compatible = "xlnx,nwl-pcie-2.11",
+      .data =       &pci_generic_ecam_ops },
+    { },
+};
+
+static int gen_pci_dt_init(struct dt_device_node *dev, const void *data)
+{
+    const struct dt_device_match *of_id;
+    const struct pci_ecam_ops *ops;
+
+    of_id = dt_match_node(gen_pci_dt_match, dev->dev.of_node);
+    ops = (struct pci_ecam_ops *) of_id->data;
+
+    printk(XENLOG_INFO "Found PCI host bridge %s compatible:%s \n",
+            dt_node_full_name(dev), of_id->compatible);
+
+    return pci_host_common_probe(dev, ops, 2);
+}
+
+DT_DEVICE_START(pci_gen, "PCI HOST ZYNQMP", DEVICE_PCI)
+.dt_match = gen_pci_dt_match,
+.init = gen_pci_dt_init,
+DT_DEVICE_END
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
2.17.1