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Diffstat (limited to 'include/uapi/linux/fpga-dfl.h')
| -rw-r--r-- | include/uapi/linux/fpga-dfl.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/include/uapi/linux/fpga-dfl.h b/include/uapi/linux/fpga-dfl.h new file mode 100644 index 000000000000..2e324e515c41 --- /dev/null +++ b/include/uapi/linux/fpga-dfl.h @@ -0,0 +1,179 @@ +/* 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 <[email protected]> + * Zhang Yi <[email protected]> + * Wu Hao <[email protected]> + * Xiao Guangrong <[email protected]> + */ + +#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 */ |