forked from Minki/linux
7af52cca6f
Commit 3cd90214b7 ("vfio: ccw: add tracepoints for interesting error
paths") added a quick trace point to determine where a channel program
failed while being processed. It's a great addition, but adding more
traces to vfio-ccw is more cumbersome than it needs to be.
Let's refactor how this is done, so that additional traces are easier
to add and can exist outside of the FSM if we ever desire.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20191016142040.14132-2-farman@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* channel program interfaces
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*
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* Copyright IBM Corp. 2017
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*
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* Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
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* Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
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*/
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#ifndef _VFIO_CCW_CP_H_
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#define _VFIO_CCW_CP_H_
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#include <asm/cio.h>
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#include <asm/scsw.h>
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#include "orb.h"
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#include "vfio_ccw_trace.h"
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/*
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* Max length for ccw chain.
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* XXX: Limit to 256, need to check more?
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*/
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#define CCWCHAIN_LEN_MAX 256
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/**
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* struct channel_program - manage information for channel program
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* @ccwchain_list: list head of ccwchains
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* @orb: orb for the currently processed ssch request
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* @mdev: the mediated device to perform page pinning/unpinning
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* @initialized: whether this instance is actually initialized
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*
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* @ccwchain_list is the head of a ccwchain list, that contents the
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* translated result of the guest channel program that pointed out by
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* the iova parameter when calling cp_init.
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*/
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struct channel_program {
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struct list_head ccwchain_list;
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union orb orb;
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struct device *mdev;
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bool initialized;
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struct ccw1 *guest_cp;
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};
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extern int cp_init(struct channel_program *cp, struct device *mdev,
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union orb *orb);
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extern void cp_free(struct channel_program *cp);
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extern int cp_prefetch(struct channel_program *cp);
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extern union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm);
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extern void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
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extern bool cp_iova_pinned(struct channel_program *cp, u64 iova);
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#endif
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