forked from Minki/linux
a9282d01cf
This documentation gives an overview of the hardware architecture, userspace APIs via /dev/cxl/afuM.N and the syfs files. It also adds a MAINTAINERS file entry for cxl. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
|
|
* Copyright 2014 IBM Corp.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _UAPI_MISC_CXL_H
|
|
#define _UAPI_MISC_CXL_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
|
|
struct cxl_ioctl_start_work {
|
|
__u64 flags;
|
|
__u64 work_element_descriptor;
|
|
__u64 amr;
|
|
__s16 num_interrupts;
|
|
__s16 reserved1;
|
|
__s32 reserved2;
|
|
__u64 reserved3;
|
|
__u64 reserved4;
|
|
__u64 reserved5;
|
|
__u64 reserved6;
|
|
};
|
|
|
|
#define CXL_START_WORK_AMR 0x0000000000000001ULL
|
|
#define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL
|
|
#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\
|
|
CXL_START_WORK_NUM_IRQS)
|
|
|
|
/* ioctl numbers */
|
|
#define CXL_MAGIC 0xCA
|
|
#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
|
|
#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32)
|
|
|
|
#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
|
|
|
|
/* Events from read() */
|
|
enum cxl_event_type {
|
|
CXL_EVENT_RESERVED = 0,
|
|
CXL_EVENT_AFU_INTERRUPT = 1,
|
|
CXL_EVENT_DATA_STORAGE = 2,
|
|
CXL_EVENT_AFU_ERROR = 3,
|
|
};
|
|
|
|
struct cxl_event_header {
|
|
__u16 type;
|
|
__u16 size;
|
|
__u16 process_element;
|
|
__u16 reserved1;
|
|
};
|
|
|
|
struct cxl_event_afu_interrupt {
|
|
__u16 flags;
|
|
__u16 irq; /* Raised AFU interrupt number */
|
|
__u32 reserved1;
|
|
};
|
|
|
|
struct cxl_event_data_storage {
|
|
__u16 flags;
|
|
__u16 reserved1;
|
|
__u32 reserved2;
|
|
__u64 addr;
|
|
__u64 dsisr;
|
|
__u64 reserved3;
|
|
};
|
|
|
|
struct cxl_event_afu_error {
|
|
__u16 flags;
|
|
__u16 reserved1;
|
|
__u32 reserved2;
|
|
__u64 error;
|
|
};
|
|
|
|
struct cxl_event {
|
|
struct cxl_event_header header;
|
|
union {
|
|
struct cxl_event_afu_interrupt irq;
|
|
struct cxl_event_data_storage fault;
|
|
struct cxl_event_afu_error afu_error;
|
|
};
|
|
};
|
|
|
|
#endif /* _UAPI_MISC_CXL_H */
|