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Date: Fri, 4 Mar 2022 21:23:03 -0800
From: Lizhi Hou <lizhi.hou@...inx.com>
To: <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
<robh@...nel.org>
CC: Lizhi Hou <lizhi.hou@...inx.com>, <yilun.xu@...el.com>,
<maxz@...inx.com>, <sonal.santan@...inx.com>, <yliu@...inx.com>,
<michal.simek@...inx.com>, <stefanos@...inx.com>,
<trix@...hat.com>, <mdf@...nel.org>, <dwmw2@...radead.org>,
<linux-kernel@...r.kernel.org>, Max Zhen <max.zhen@...inx.com>
Subject: [PATCH V1 RESEND 3/4] fpga: xrt: management physical function driver
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@...inx.com>
Signed-off-by: Max Zhen <max.zhen@...inx.com>
Signed-off-by: Lizhi Hou <lizhi.hou@...inx.com>
---
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-$(CONFIG_FPGA_XRT) += xrt/
diff --git a/drivers/fpga/xrt/Kconfig b/drivers/fpga/xrt/Kconfig
new file mode 100644
index 000000000000..47efc8f71cec
--- /dev/null
+++ b/drivers/fpga/xrt/Kconfig
@@ -0,0 +1,24 @@
+
+# XRT Alveo FPGA device configuration
+#
+
+config FPGA_XRT
+ tristate "XRT Alveo Drivers"
+ depends on OF
+ select OF_EMPTY_ROOT
+ select OF_OVERLAY
+ help
+ Select this option to enable Xilinx XRT Alveo drivers. Xilinx Alveo
+ card is PCIe device and has two PCIe functions. The first function
+ performs board manangement and XRT management driver will be attached
+ to it. The second function performs data movement, compute unit
+ scheduling etc. And an XRT user driver will be attached to it.
+
+config FPGA_XRT_XMGMT
+ tristate "Xilinx Alveo Management Driver"
+ depends on FPGA_XRT
+ help
+ Select this option to enable XRT PCIe driver for Xilinx Alveo FPGA.
+ This driver provides interfaces for userspace application to access
+ Alveo FPGA device, such as: downloading FPGA bitstream, query card
+ information, hot reset card etc.
diff --git a/drivers/fpga/xrt/Makefile b/drivers/fpga/xrt/Makefile
new file mode 100644
index 000000000000..2d251b5653bb
--- /dev/null
+++ b/drivers/fpga/xrt/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2020-2022 Xilinx, Inc. All rights reserved.
+#
+# Authors: Lizhi.Hou@...inx.com
+#
+
+obj-$(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@...inx.com
+# Lizhi.Hou@...inx.com
+#
+
+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@...inx.com>
+ * Lizhi Hou <lizhih@...inx.com>
+ */
+
+#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@...inx.com>");
+MODULE_DESCRIPTION("Xilinx Alveo management function driver");
+MODULE_LICENSE("GPL v2");
--
2.27.0
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