tjh.dev
Linux kernel mirror (for testing)
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linux
1/*
2 * Tracepoint definitions for the s390 zcrypt device driver
3 *
4 * Copyright IBM Corp. 2016
5 * Author(s): Harald Freudenberger <freude@de.ibm.com>
6 *
7 * Currently there are two tracepoint events defined here.
8 * An s390_zcrypt_req request event occurs as soon as the request is
9 * recognized by the zcrypt ioctl function. This event may act as some kind
10 * of request-processing-starts-now indication.
11 * As late as possible within the zcrypt ioctl function there occurs the
12 * s390_zcrypt_rep event which may act as the point in time where the
13 * request has been processed by the kernel and the result is about to be
14 * transferred back to userspace.
15 * The glue which binds together request and reply event is the ptr
16 * parameter, which is the local buffer address where the request from
17 * userspace has been stored by the ioctl function.
18 *
19 * The main purpose of this zcrypt tracepoint api is to get some data for
20 * performance measurements together with information about on which card
21 * and queue the request has been processed. It is not an ffdc interface as
22 * there is already code in the zcrypt device driver to serve the s390
23 * debug feature interface.
24 */
25
26#undef TRACE_SYSTEM
27#define TRACE_SYSTEM s390
28
29#if !defined(_TRACE_S390_ZCRYPT_H) || defined(TRACE_HEADER_MULTI_READ)
30#define _TRACE_S390_ZCRYPT_H
31
32#include <linux/tracepoint.h>
33
34#define TP_ICARSAMODEXPO 0x0001
35#define TP_ICARSACRT 0x0002
36#define TB_ZSECSENDCPRB 0x0003
37#define TP_ZSENDEP11CPRB 0x0004
38#define TP_HWRNGCPRB 0x0005
39
40#define show_zcrypt_tp_type(type) \
41 __print_symbolic(type, \
42 { TP_ICARSAMODEXPO, "ICARSAMODEXPO" }, \
43 { TP_ICARSACRT, "ICARSACRT" }, \
44 { TB_ZSECSENDCPRB, "ZSECSENDCPRB" }, \
45 { TP_ZSENDEP11CPRB, "ZSENDEP11CPRB" }, \
46 { TP_HWRNGCPRB, "HWRNGCPRB" })
47
48/**
49 * trace_s390_zcrypt_req - zcrypt request tracepoint function
50 * @ptr: Address of the local buffer where the request from userspace
51 * is stored. Can be used as a unique id to relate together
52 * request and reply.
53 * @type: One of the TP_ defines above.
54 *
55 * Called when a request from userspace is recognised within the ioctl
56 * function of the zcrypt device driver and may act as an entry
57 * timestamp.
58 */
59TRACE_EVENT(s390_zcrypt_req,
60 TP_PROTO(void *ptr, u32 type),
61 TP_ARGS(ptr, type),
62 TP_STRUCT__entry(
63 __field(void *, ptr)
64 __field(u32, type)),
65 TP_fast_assign(
66 __entry->ptr = ptr;
67 __entry->type = type;),
68 TP_printk("ptr=%p type=%s",
69 __entry->ptr,
70 show_zcrypt_tp_type(__entry->type))
71);
72
73/**
74 * trace_s390_zcrypt_rep - zcrypt reply tracepoint function
75 * @ptr: Address of the local buffer where the request from userspace
76 * is stored. Can be used as a unique id to match together
77 * request and reply.
78 * @fc: Function code.
79 * @rc: The bare returncode as returned by the device driver ioctl
80 * function.
81 * @dev: The adapter nr where this request was actually processed.
82 * @dom: Domain id of the device where this request was processed.
83 *
84 * Called upon recognising the reply from the crypto adapter. This
85 * message may act as the exit timestamp for the request but also
86 * carries some info about on which adapter the request was processed
87 * and the returncode from the device driver.
88 */
89TRACE_EVENT(s390_zcrypt_rep,
90 TP_PROTO(void *ptr, u32 fc, u32 rc, u16 dev, u16 dom),
91 TP_ARGS(ptr, fc, rc, dev, dom),
92 TP_STRUCT__entry(
93 __field(void *, ptr)
94 __field(u32, fc)
95 __field(u32, rc)
96 __field(u16, device)
97 __field(u16, domain)),
98 TP_fast_assign(
99 __entry->ptr = ptr;
100 __entry->fc = fc;
101 __entry->rc = rc;
102 __entry->device = dev;
103 __entry->domain = dom;),
104 TP_printk("ptr=%p fc=0x%04x rc=%d dev=0x%02hx domain=0x%04hx",
105 __entry->ptr,
106 (unsigned int) __entry->fc,
107 (int) __entry->rc,
108 (unsigned short) __entry->device,
109 (unsigned short) __entry->domain)
110);
111
112#endif /* _TRACE_S390_ZCRYPT_H */
113
114/* This part must be outside protection */
115
116#undef TRACE_INCLUDE_PATH
117#undef TRACE_INCLUDE_FILE
118
119#define TRACE_INCLUDE_PATH asm/trace
120#define TRACE_INCLUDE_FILE zcrypt
121
122#include <trace/define_trace.h>