/* 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 0 xB6
#define DFL_FPGA_BASE 0
#define DFL_PORT_BASE 0 x40
#define DFL_FME_BASE 0 x80
/* 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 )
/**
* struct dfl_fpga_irq_set - the argument for DFL_FPGA_XXX_SET_IRQ ioctl .
*
* @ start : Index of the first irq .
* @ count : The number of eventfd handler .
* @ evtfds : Eventfd handlers .
*/
struct dfl_fpga_irq_set {
__u32 start;
__u32 count;
__s32 evtfds[];
};
/**
* DFL_FPGA_PORT_ERR_GET_IRQ_NUM - _ IOR ( DFL_FPGA_MAGIC , DFL_PORT_BASE + 5 ,
* _ _ u32 num_irqs )
*
* Get the number of irqs supported by the fpga port error reporting private
* feature . Currently hardware supports up to 1 irq .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_PORT_ERR_GET_IRQ_NUM _IOR(DFL_FPGA_MAGIC, \
DFL_PORT_BASE + 5 , __u32)
/**
* DFL_FPGA_PORT_ERR_SET_IRQ - _ IOW ( DFL_FPGA_MAGIC , DFL_PORT_BASE + 6 ,
* struct dfl_fpga_irq_set )
*
* Set fpga port error reporting interrupt trigger if evtfds [ n ] is valid .
* Unset related interrupt trigger if evtfds [ n ] is a negative value .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_PORT_ERR_SET_IRQ _IOW(DFL_FPGA_MAGIC, \
DFL_PORT_BASE + 6 , \
struct dfl_fpga_irq_set)
/**
* DFL_FPGA_PORT_UINT_GET_IRQ_NUM - _ IOR ( DFL_FPGA_MAGIC , DFL_PORT_BASE + 7 ,
* _ _ u32 num_irqs )
*
* Get the number of irqs supported by the fpga AFU interrupt private
* feature .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_PORT_UINT_GET_IRQ_NUM _IOR(DFL_FPGA_MAGIC, \
DFL_PORT_BASE + 7 , __u32)
/**
* DFL_FPGA_PORT_UINT_SET_IRQ - _ IOW ( DFL_FPGA_MAGIC , DFL_PORT_BASE + 8 ,
* struct dfl_fpga_irq_set )
*
* Set fpga AFU interrupt trigger if evtfds [ n ] is valid .
* Unset related interrupt trigger if evtfds [ n ] is a negative value .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_PORT_UINT_SET_IRQ _IOW(DFL_FPGA_MAGIC, \
DFL_PORT_BASE + 8 , \
struct dfl_fpga_irq_set)
/* 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 )
/**
* DFL_FPGA_FME_PORT_RELEASE - _ IOW ( DFL_FPGA_MAGIC , DFL_FME_BASE + 1 ,
* int port_id )
*
* Driver releases the port per Port ID provided by caller .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_FME_PORT_RELEASE _IOW(DFL_FPGA_MAGIC, DFL_FME_BASE + 1 , int )
/**
* DFL_FPGA_FME_PORT_ASSIGN - _ IOW ( DFL_FPGA_MAGIC , DFL_FME_BASE + 2 ,
* int port_id )
*
* Driver assigns the port back per Port ID provided by caller .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_FME_PORT_ASSIGN _IOW(DFL_FPGA_MAGIC, DFL_FME_BASE + 2 , int )
/**
* DFL_FPGA_FME_ERR_GET_IRQ_NUM - _ IOR ( DFL_FPGA_MAGIC , DFL_FME_BASE + 3 ,
* _ _ u32 num_irqs )
*
* Get the number of irqs supported by the fpga fme error reporting private
* feature . Currently hardware supports up to 1 irq .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_FME_ERR_GET_IRQ_NUM _IOR(DFL_FPGA_MAGIC, \
DFL_FME_BASE + 3 , __u32)
/**
* DFL_FPGA_FME_ERR_SET_IRQ - _ IOW ( DFL_FPGA_MAGIC , DFL_FME_BASE + 4 ,
* struct dfl_fpga_irq_set )
*
* Set fpga fme error reporting interrupt trigger if evtfds [ n ] is valid .
* Unset related interrupt trigger if evtfds [ n ] is a negative value .
* Return : 0 on success , - errno on failure .
*/
#define DFL_FPGA_FME_ERR_SET_IRQ _IOW(DFL_FPGA_MAGIC, \
DFL_FME_BASE + 4 , \
struct dfl_fpga_irq_set)
#endif /* _UAPI_LINUX_FPGA_DFL_H */
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