[PATCH V1 RESEND 3/4] fpga: xrt: management physical function driver

[Lizhi Hou]

The PCIe device driver which attaches to management function on Alveo
devices. The first version of this driver demonstrates calling PCIe
interface to create device tree node.

Signed-off-by: Sonal Santan <sonal.santan@xxxxxxxxxx>
Signed-off-by: Max Zhen <max.zhen@xxxxxxxxxx>
Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxxxxx>
---
 drivers/fpga/Kconfig              |  3 ++
 drivers/fpga/Makefile             |  3 ++
 drivers/fpga/xrt/Kconfig          | 24 ++++++++++++
 drivers/fpga/xrt/Makefile         |  8 ++++
 drivers/fpga/xrt/mgmt/Makefile    | 12 ++++++
 drivers/fpga/xrt/mgmt/xmgmt-drv.c | 63 +++++++++++++++++++++++++++++++
 6 files changed, 113 insertions(+)
 create mode 100644 drivers/fpga/xrt/Kconfig
 create mode 100644 drivers/fpga/xrt/Makefile
 create mode 100644 drivers/fpga/xrt/mgmt/Makefile
 create mode 100644 drivers/fpga/xrt/mgmt/xmgmt-drv.c

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 991b3f361ec9..93ae387c97c5 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -243,4 +243,7 @@ config FPGA_MGR_VERSAL_FPGA
 	  configure the programmable logic(PL).
 
 	  To compile this as a module, choose M here.
+
+source "drivers/fpga/xrt/Kconfig"
+
 endif # FPGA
diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
index 0bff783d1b61..81ea43c40c64 100644
--- a/drivers/fpga/Makefile
+++ b/drivers/fpga/Makefile
@@ -49,3 +49,6 @@ obj-$(CONFIG_FPGA_DFL_NIOS_INTEL_PAC_N3000)	+= dfl-n3000-nios.o
 
 # Drivers for FPGAs which implement DFL
 obj-$(CONFIG_FPGA_DFL_PCI)		+= dfl-pci.o
+
+# XRT drivers for Xilinx Alveo platforms
+obj-$(CONFIG_FPGA_XRT)		+= xrt/
diff --git a/drivers/fpga/xrt/Kconfig b/drivers/fpga/xrt/Kconfig
new file mode 100644
index 000000000000..47efc8f71cec
--- /dev/null
+++ b/drivers/fpga/xrt/Kconfig
@@ -0,0 +1,24 @@
+
+# XRT Alveo FPGA device configuration
+#
+
+config FPGA_XRT
+	tristate "XRT Alveo Drivers"
+	depends on OF
+	select OF_EMPTY_ROOT
+	select OF_OVERLAY
+	help
+	  Select this option to enable Xilinx XRT Alveo drivers. Xilinx Alveo
+	  card is PCIe device and has two PCIe functions. The first function
+	  performs board manangement and XRT management driver will be attached
+	  to it. The second function performs data movement, compute unit
+	  scheduling etc. And an XRT user driver will be attached to it.
+
+config FPGA_XRT_XMGMT
+	tristate "Xilinx Alveo Management Driver"
+	depends on FPGA_XRT
+	help
+	  Select this option to enable XRT PCIe driver for Xilinx Alveo FPGA.
+	  This driver provides interfaces for userspace application to access
+	  Alveo FPGA device, such as: downloading FPGA bitstream, query card
+	  information, hot reset card etc.
diff --git a/drivers/fpga/xrt/Makefile b/drivers/fpga/xrt/Makefile
new file mode 100644
index 000000000000..2d251b5653bb
--- /dev/null
+++ b/drivers/fpga/xrt/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2020-2022 Xilinx, Inc. All rights reserved.
+#
+# Authors: Lizhi.Hou@xxxxxxxxxx
+#
+
+obj-$(CONFIG_FPGA_XRT_XMGMT) += mgmt/
diff --git a/drivers/fpga/xrt/mgmt/Makefile b/drivers/fpga/xrt/mgmt/Makefile
new file mode 100644
index 000000000000..b893c7293d70
--- /dev/null
+++ b/drivers/fpga/xrt/mgmt/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2020-2022 Xilinx, Inc. All rights reserved.
+#
+# Authors: Sonal.Santan@xxxxxxxxxx
+#          Lizhi.Hou@xxxxxxxxxx
+#
+
+obj-$(CONFIG_FPGA_XRT_XMGMT) += xrt-mgmt.o
+
+xrt-mgmt-objs :=		\
+	xmgmt-drv.o
diff --git a/drivers/fpga/xrt/mgmt/xmgmt-drv.c b/drivers/fpga/xrt/mgmt/xmgmt-drv.c
new file mode 100644
index 000000000000..60742a478a43
--- /dev/null
+++ b/drivers/fpga/xrt/mgmt/xmgmt-drv.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Alveo Management Function Driver
+ *
+ * Copyright (C) 2020-2022 Xilinx, Inc.
+ *
+ * Authors:
+ *     Cheng Zhen <maxz@xxxxxxxxxx>
+ *     Lizhi Hou <lizhih@xxxxxxxxxx>
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/of_pci.h>
+
+#define XMGMT_MODULE_NAME	"xrt-mgmt"
+
+/* PCI Device IDs */
+#define PCI_DEVICE_ID_U50	0x5020
+static const struct pci_device_id xmgmt_pci_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_XILINX, PCI_DEVICE_ID_U50), }, /* Alveo U50 */
+	{ 0, }
+};
+
+static int xmgmt_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	devm_of_pci_create_bus_endpoint(pdev);
+
+	return 0;
+}
+
+static struct pci_driver xmgmt_driver = {
+	.name = XMGMT_MODULE_NAME,
+	.id_table = xmgmt_pci_ids,
+	.probe = xmgmt_probe,
+};
+
+static int __init xmgmt_init(void)
+{
+	int res;
+
+	res = pci_register_driver(&xmgmt_driver);
+	if (res)
+		return res;
+
+	return 0;
+}
+
+static __exit void xmgmt_exit(void)
+{
+	pci_unregister_driver(&xmgmt_driver);
+}
+
+module_init(xmgmt_init);
+module_exit(xmgmt_exit);
+
+MODULE_DEVICE_TABLE(pci, xmgmt_pci_ids);
+MODULE_AUTHOR("XRT Team <runtime@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Xilinx Alveo management function driver");
+MODULE_LICENSE("GPL v2");
-- 
2.27.0