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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | /* |
| 3 | * Tracepoint definitions for the s390 zcrypt device driver |
| 4 | * |
| 5 | * Copyright IBM Corp. 2016,2025 |
| 6 | * Author(s): Harald Freudenberger <freude@de.ibm.com> |
| 7 | * |
| 8 | * Currently there are two tracepoint events defined here. |
| 9 | * An s390_zcrypt_req request event occurs as soon as the request is |
| 10 | * recognized by the zcrypt ioctl function. This event may act as some kind |
| 11 | * of request-processing-starts-now indication. |
| 12 | * As late as possible within the zcrypt ioctl function there occurs the |
| 13 | * s390_zcrypt_rep event which may act as the point in time where the |
| 14 | * request has been processed by the kernel and the result is about to be |
| 15 | * transferred back to userspace. |
| 16 | * The glue which binds together request and reply event is the ptr |
| 17 | * parameter, which is the local buffer address where the request from |
| 18 | * userspace has been stored by the ioctl function. |
| 19 | * |
| 20 | * The main purpose of this zcrypt tracepoint api is to get some data for |
| 21 | * performance measurements together with information about on which card |
| 22 | * and queue the request has been processed. It is not an ffdc interface as |
| 23 | * there is already code in the zcrypt device driver to serve the s390 |
| 24 | * debug feature interface. |
| 25 | */ |
| 26 | |
| 27 | #undef TRACE_SYSTEM |
| 28 | #define TRACE_SYSTEM s390 |
| 29 | |
| 30 | #if !defined(_TRACE_S390_ZCRYPT_H) || defined(TRACE_HEADER_MULTI_READ) |
| 31 | #define _TRACE_S390_ZCRYPT_H |
| 32 | |
| 33 | #include <linux/tracepoint.h> |
| 34 | |
| 35 | #define TP_ICARSAMODEXPO 0x0001 |
| 36 | #define TP_ICARSACRT 0x0002 |
| 37 | #define TB_ZSECSENDCPRB 0x0003 |
| 38 | #define TP_ZSENDEP11CPRB 0x0004 |
| 39 | #define TP_HWRNGCPRB 0x0005 |
| 40 | |
| 41 | #define show_zcrypt_tp_type(type) \ |
| 42 | __print_symbolic(type, \ |
| 43 | { TP_ICARSAMODEXPO, "ICARSAMODEXPO" }, \ |
| 44 | { TP_ICARSACRT, "ICARSACRT" }, \ |
| 45 | { TB_ZSECSENDCPRB, "ZSECSENDCPRB" }, \ |
| 46 | { TP_ZSENDEP11CPRB, "ZSENDEP11CPRB" }, \ |
| 47 | { TP_HWRNGCPRB, "HWRNGCPRB" }) |
| 48 | |
| 49 | /** |
| 50 | * trace_s390_zcrypt_req - zcrypt request tracepoint function |
| 51 | * @ptr: Address of the local buffer where the request from userspace |
| 52 | * is stored. Can be used as a unique id to relate together |
| 53 | * request and reply. |
| 54 | * @type: One of the TP_ defines above. |
| 55 | * |
| 56 | * Called when a request from userspace is recognised within the ioctl |
| 57 | * function of the zcrypt device driver and may act as an entry |
| 58 | * timestamp. |
| 59 | */ |
| 60 | TRACE_EVENT(s390_zcrypt_req, |
| 61 | TP_PROTO(void *ptr, u32 type), |
| 62 | TP_ARGS(ptr, type), |
| 63 | TP_STRUCT__entry( |
| 64 | __field(void *, ptr) |
| 65 | __field(u32, type)), |
| 66 | TP_fast_assign( |
| 67 | __entry->ptr = ptr; |
| 68 | __entry->type = type;), |
| 69 | TP_printk("ptr=%p type=%s", |
| 70 | __entry->ptr, |
| 71 | show_zcrypt_tp_type(__entry->type)) |
| 72 | ); |
| 73 | |
| 74 | /** |
| 75 | * trace_s390_zcrypt_rep - zcrypt reply tracepoint function |
| 76 | * @ptr: Address of the local buffer where the request from userspace |
| 77 | * is stored. Can be used as a unique id to match together |
| 78 | * request and reply. |
| 79 | * @fc: Function code. |
| 80 | * @rc: The bare returncode as returned by the device driver ioctl |
| 81 | * function. |
| 82 | * @card: The adapter nr where this request was actually processed. |
| 83 | * @dom: Domain id of the device where this request was processed. |
| 84 | * @psmid: Unique id identifying this request/reply. |
| 85 | * |
| 86 | * Called upon recognising the reply from the crypto adapter. This |
| 87 | * message may act as the exit timestamp for the request but also |
| 88 | * carries some info about on which adapter the request was processed |
| 89 | * and the returncode from the device driver. |
| 90 | */ |
| 91 | TRACE_EVENT(s390_zcrypt_rep, |
| 92 | TP_PROTO(void *ptr, u32 fc, u32 rc, u16 card, u16 dom, u64 psmid), |
| 93 | TP_ARGS(ptr, fc, rc, card, dom, psmid), |
| 94 | TP_STRUCT__entry( |
| 95 | __field(void *, ptr) |
| 96 | __field(u32, fc) |
| 97 | __field(u32, rc) |
| 98 | __field(u16, card) |
| 99 | __field(u16, dom) |
| 100 | __field(u64, psmid)), |
| 101 | TP_fast_assign( |
| 102 | __entry->ptr = ptr; |
| 103 | __entry->fc = fc; |
| 104 | __entry->rc = rc; |
| 105 | __entry->card = card; |
| 106 | __entry->dom = dom; |
| 107 | __entry->psmid = psmid;), |
| 108 | TP_printk("ptr=%p fc=0x%04x rc=%d card=%u dom=%u psmid=0x%016lx", |
| 109 | __entry->ptr, |
| 110 | (unsigned int)__entry->fc, |
| 111 | (int)__entry->rc, |
| 112 | (unsigned short)__entry->card, |
| 113 | (unsigned short)__entry->dom, |
| 114 | (unsigned long)__entry->psmid) |
| 115 | ); |
| 116 | |
| 117 | #endif /* _TRACE_S390_ZCRYPT_H */ |
| 118 | |
| 119 | /* This part must be outside protection */ |
| 120 | |
| 121 | #undef TRACE_INCLUDE_PATH |
| 122 | #undef TRACE_INCLUDE_FILE |
| 123 | |
| 124 | #define TRACE_INCLUDE_PATH asm/trace |
| 125 | #define TRACE_INCLUDE_FILE zcrypt |
| 126 | |
| 127 | #include <trace/define_trace.h> |
| 128 |
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