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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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aeddad1760
Add user APIs through ioctl to allocate, free, and be notified of an AFU interrupt. For opencapi, an AFU can trigger an interrupt on the host by sending a specific command targeting a 64-bit object handle. On POWER9, this is implemented by mapping a special page in the address space of a process and a write to that page will trigger an interrupt. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
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/* Copyright 2017 IBM Corp. */
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#ifndef _UAPI_MISC_OCXL_H
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#define _UAPI_MISC_OCXL_H
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#include <linux/types.h>
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#include <linux/ioctl.h>
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enum ocxl_event_type {
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OCXL_AFU_EVENT_XSL_FAULT_ERROR = 0,
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};
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#define OCXL_KERNEL_EVENT_FLAG_LAST 0x0001 /* This is the last event pending */
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struct ocxl_kernel_event_header {
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__u16 type;
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__u16 flags;
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__u32 reserved;
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};
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struct ocxl_kernel_event_xsl_fault_error {
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__u64 addr;
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__u64 dsisr;
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__u64 count;
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__u64 reserved;
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};
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struct ocxl_ioctl_attach {
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__u64 amr;
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__u64 reserved1;
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__u64 reserved2;
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__u64 reserved3;
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};
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struct ocxl_ioctl_irq_fd {
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__u64 irq_offset;
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__s32 eventfd;
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__u32 reserved;
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};
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/* ioctl numbers */
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#define OCXL_MAGIC 0xCA
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/* AFU devices */
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#define OCXL_IOCTL_ATTACH _IOW(OCXL_MAGIC, 0x10, struct ocxl_ioctl_attach)
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#define OCXL_IOCTL_IRQ_ALLOC _IOR(OCXL_MAGIC, 0x11, __u64)
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#define OCXL_IOCTL_IRQ_FREE _IOW(OCXL_MAGIC, 0x12, __u64)
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#define OCXL_IOCTL_IRQ_SET_FD _IOW(OCXL_MAGIC, 0x13, struct ocxl_ioctl_irq_fd)
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#endif /* _UAPI_MISC_OCXL_H */
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