Home | History | Annotate | Download | only in misc 
      1 /*
      2  * Copyright 2014 IBM Corp.
      3  *
      4  * This program is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU General Public License
      6  * as published by the Free Software Foundation; either version
      7  * 2 of the License, or (at your option) any later version.
      8  */
      9 
     10 #ifndef _UAPI_MISC_CXL_H
     11 #define _UAPI_MISC_CXL_H
     12 
     13 #include <linux/types.h>
     14 #include <linux/ioctl.h>
     15 
     16 
     17 struct cxl_ioctl_start_work {
     18 	__u64 flags;
     19 	__u64 work_element_descriptor;
     20 	__u64 amr;
     21 	__s16 num_interrupts;
     22 	__s16 reserved1;
     23 	__s32 reserved2;
     24 	__u64 reserved3;
     25 	__u64 reserved4;
     26 	__u64 reserved5;
     27 	__u64 reserved6;
     28 };
     29 
     30 #define CXL_START_WORK_AMR		0x0000000000000001ULL
     31 #define CXL_START_WORK_NUM_IRQS		0x0000000000000002ULL
     32 #define CXL_START_WORK_ERR_FF		0x0000000000000004ULL
     33 #define CXL_START_WORK_ALL		(CXL_START_WORK_AMR |\
     34 					 CXL_START_WORK_NUM_IRQS |\
     35 					 CXL_START_WORK_ERR_FF)
     36 
     37 
     38 /* Possible modes that an afu can be in */
     39 #define CXL_MODE_DEDICATED   0x1
     40 #define CXL_MODE_DIRECTED    0x2
     41 
     42 /* possible flags for the cxl_afu_id flags field */
     43 #define CXL_AFUID_FLAG_SLAVE    0x1  /* In directed-mode afu is in slave mode */
     44 
     45 struct cxl_afu_id {
     46 	__u64 flags;     /* One of CXL_AFUID_FLAG_X */
     47 	__u32 card_id;
     48 	__u32 afu_offset;
     49 	__u32 afu_mode;  /* one of the CXL_MODE_X */
     50 	__u32 reserved1;
     51 	__u64 reserved2;
     52 	__u64 reserved3;
     53 	__u64 reserved4;
     54 	__u64 reserved5;
     55 	__u64 reserved6;
     56 };
     57 
     58 /* ioctl numbers */
     59 #define CXL_MAGIC 0xCA
     60 #define CXL_IOCTL_START_WORK		_IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
     61 #define CXL_IOCTL_GET_PROCESS_ELEMENT	_IOR(CXL_MAGIC, 0x01, __u32)
     62 #define CXL_IOCTL_GET_AFU_ID            _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
     63 
     64 #define CXL_READ_MIN_SIZE 0x1000 /* 4K */
     65 
     66 /* Events from read() */
     67 enum cxl_event_type {
     68 	CXL_EVENT_RESERVED      = 0,
     69 	CXL_EVENT_AFU_INTERRUPT = 1,
     70 	CXL_EVENT_DATA_STORAGE  = 2,
     71 	CXL_EVENT_AFU_ERROR     = 3,
     72 };
     73 
     74 struct cxl_event_header {
     75 	__u16 type;
     76 	__u16 size;
     77 	__u16 process_element;
     78 	__u16 reserved1;
     79 };
     80 
     81 struct cxl_event_afu_interrupt {
     82 	__u16 flags;
     83 	__u16 irq; /* Raised AFU interrupt number */
     84 	__u32 reserved1;
     85 };
     86 
     87 struct cxl_event_data_storage {
     88 	__u16 flags;
     89 	__u16 reserved1;
     90 	__u32 reserved2;
     91 	__u64 addr;
     92 	__u64 dsisr;
     93 	__u64 reserved3;
     94 };
     95 
     96 struct cxl_event_afu_error {
     97 	__u16 flags;
     98 	__u16 reserved1;
     99 	__u32 reserved2;
    100 	__u64 error;
    101 };
    102 
    103 struct cxl_event {
    104 	struct cxl_event_header header;
    105 	union {
    106 		struct cxl_event_afu_interrupt irq;
    107 		struct cxl_event_data_storage fault;
    108 		struct cxl_event_afu_error afu_error;
    109 	};
    110 };
    111 
    112 #endif /* _UAPI_MISC_CXL_H */
    113