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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Header File for FPGA DFL User API
*
* Copyright (C) 2017-2018 Intel Corporation, Inc.
*
* Authors:
* Kang Luwei <luwei.kang@intel.com>
* Zhang Yi <yi.z.zhang@intel.com>
* Wu Hao <hao.wu@intel.com>
* Xiao Guangrong <guangrong.xiao@linux.intel.com>
*/
#ifndef _UAPI_LINUX_FPGA_DFL_H
#define _UAPI_LINUX_FPGA_DFL_H
#include <linux/types.h>
#include <linux/ioctl.h>
#define DFL_FPGA_API_VERSION 0
/*
* The IOCTL interface for DFL based FPGA is designed for extensibility by
* embedding the structure length (argsz) and flags into structures passed
* between kernel and userspace. This design referenced the VFIO IOCTL
* interface (include/uapi/linux/vfio.h).
*/
#define DFL_FPGA_MAGIC 0xB6
#define DFL_FPGA_BASE 0
#define DFL_PORT_BASE 0x40
#define DFL_FME_BASE 0x80
/* Common IOCTLs for both FME and AFU file descriptor */
/**
* DFL_FPGA_GET_API_VERSION - _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 0)
*
* Report the version of the driver API.
* Return: Driver API Version.
*/
#define DFL_FPGA_GET_API_VERSION _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 0)
/**
* DFL_FPGA_CHECK_EXTENSION - _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 1)
*
* Check whether an extension is supported.
* Return: 0 if not supported, otherwise the extension is supported.
*/
#define DFL_FPGA_CHECK_EXTENSION _IO(DFL_FPGA_MAGIC, DFL_FPGA_BASE + 1)
/* IOCTLs for AFU file descriptor */
/**
* DFL_FPGA_PORT_RESET - _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 0)
*
* Reset the FPGA Port and its AFU. No parameters are supported.
* Userspace can do Port reset at any time, e.g. during DMA or PR. But
* it should never cause any system level issue, only functional failure
* (e.g. DMA or PR operation failure) and be recoverable from the failure.
* Return: 0 on success, -errno of failure
*/
#define DFL_FPGA_PORT_RESET _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 0)
/**
* DFL_FPGA_PORT_GET_INFO - _IOR(DFL_FPGA_MAGIC, DFL_PORT_BASE + 1,
* struct dfl_fpga_port_info)
*
* Retrieve information about the fpga port.
* Driver fills the info in provided struct dfl_fpga_port_info.
* Return: 0 on success, -errno on failure.
*/
struct dfl_fpga_port_info {
/* Input */
__u32 argsz; /* Structure length */
/* Output */
__u32 flags; /* Zero for now */
__u32 num_regions; /* The number of supported regions */
__u32 num_umsgs; /* The number of allocated umsgs */
};
#define DFL_FPGA_PORT_GET_INFO _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 1)
/**
* FPGA_PORT_GET_REGION_INFO - _IOWR(FPGA_MAGIC, PORT_BASE + 2,
* struct dfl_fpga_port_region_info)
*
* Retrieve information about a device memory region.
* Caller provides struct dfl_fpga_port_region_info with index value set.
* Driver returns the region info in other fields.
* Return: 0 on success, -errno on failure.
*/
struct dfl_fpga_port_region_info {
/* input */
__u32 argsz; /* Structure length */
/* Output */
__u32 flags; /* Access permission */
#define DFL_PORT_REGION_READ (1 << 0) /* Region is readable */
#define DFL_PORT_REGION_WRITE (1 << 1) /* Region is writable */
#define DFL_PORT_REGION_MMAP (1 << 2) /* Can be mmaped to userspace */
/* Input */
__u32 index; /* Region index */
#define DFL_PORT_REGION_INDEX_AFU 0 /* AFU */
#define DFL_PORT_REGION_INDEX_STP 1 /* Signal Tap */
__u32 padding;
/* Output */
__u64 size; /* Region size (bytes) */
__u64 offset; /* Region offset from start of device fd */
};
#define DFL_FPGA_PORT_GET_REGION_INFO _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 2)
/**
* DFL_FPGA_PORT_DMA_MAP - _IOWR(DFL_FPGA_MAGIC, DFL_PORT_BASE + 3,
* struct dfl_fpga_port_dma_map)
*
* Map the dma memory per user_addr and length which are provided by caller.
* Driver fills the iova in provided struct afu_port_dma_map.
* This interface only accepts page-size aligned user memory for dma mapping.
* Return: 0 on success, -errno on failure.
*/
struct dfl_fpga_port_dma_map {
/* Input */
__u32 argsz; /* Structure length */
__u32 flags; /* Zero for now */
__u64 user_addr; /* Process virtual address */
__u64 length; /* Length of mapping (bytes)*/
/* Output */
__u64 iova; /* IO virtual address */
};
#define DFL_FPGA_PORT_DMA_MAP _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 3)
/**
* DFL_FPGA_PORT_DMA_UNMAP - _IOW(FPGA_MAGIC, PORT_BASE + 4,
* struct dfl_fpga_port_dma_unmap)
*
* Unmap the dma memory per iova provided by caller.
* Return: 0 on success, -errno on failure.
*/
struct dfl_fpga_port_dma_unmap {
/* Input */
__u32 argsz; /* Structure length */
__u32 flags; /* Zero for now */
__u64 iova; /* IO virtual address */
};
#define DFL_FPGA_PORT_DMA_UNMAP _IO(DFL_FPGA_MAGIC, DFL_PORT_BASE + 4)
/* IOCTLs for FME file descriptor */
/**
* DFL_FPGA_FME_PORT_PR - _IOW(DFL_FPGA_MAGIC, DFL_FME_BASE + 0,
* struct dfl_fpga_fme_port_pr)
*
* Driver does Partial Reconfiguration based on Port ID and Buffer (Image)
* provided by caller.
* Return: 0 on success, -errno on failure.
* If DFL_FPGA_FME_PORT_PR returns -EIO, that indicates the HW has detected
* some errors during PR, under this case, the user can fetch HW error info
* from the status of FME's fpga manager.
*/
struct dfl_fpga_fme_port_pr {
/* Input */
__u32 argsz; /* Structure length */
__u32 flags; /* Zero for now */
__u32 port_id;
__u32 buffer_size;
__u64 buffer_address; /* Userspace address to the buffer for PR */
};
#define DFL_FPGA_FME_PORT_PR _IO(DFL_FPGA_MAGIC, DFL_FME_BASE + 0)
#endif /* _UAPI_LINUX_FPGA_DFL_H */
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