+ Kishon
On Fri, Mar 04, 2022 at 09:23:03PM -0800, Lizhi Hou wrote:
> 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.
>
I'm assuming that this driver implements the PCI endpoint functions. Then this
driver should be under drivers/pci/endpoint/functions/ making use of the
existing PCI endpoint subsystem.
Thanks,
Mani
> 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
>
--
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