aboutsummaryrefslogtreecommitdiffstats
path: root/include/trace
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2014-03-06 08:36:06 -0500
committerWolfram Sang <wsa@the-dreams.de>2014-03-13 17:15:07 -0400
commit8a325997d95d446206b204b7859e055a0315e4fa (patch)
treec14cb0b0af6cd80229a6fea12b0b5ca76a1ecaac /include/trace
parentd9a83d62b326574fb4831b64317a82a42642a9a2 (diff)
i2c: Add message transfer tracepoints for SMBUS [ver #2]
The SMBUS tracepoints can be enabled thusly: echo 1 >/sys/kernel/debug/tracing/events/i2c/enable and will dump messages that can be viewed in /sys/kernel/debug/tracing/trace that look like: ... smbus_read: i2c-0 a=051 f=0000 c=fa BYTE_DATA ... smbus_reply: i2c-0 a=051 f=0000 c=fa BYTE_DATA l=1 [39] ... smbus_result: i2c-0 a=051 f=0000 c=fa BYTE_DATA rd res=0 formatted as: i2c-<adapter-nr> a=<addr> f=<flags> c=<command> <protocol-name> <rd|wr> res=<result> l=<data-len> [<data-block>] The adapters to be traced can be selected by something like: echo adapter_nr==1 >/sys/kernel/debug/tracing/events/i2c/filter Note that this shares the same filter and enablement as i2c. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/i2c.h224
1 files changed, 223 insertions, 1 deletions
diff --git a/include/trace/events/i2c.h b/include/trace/events/i2c.h
index 4800207269a2..fe17187df65d 100644
--- a/include/trace/events/i2c.h
+++ b/include/trace/events/i2c.h
@@ -1,4 +1,4 @@
1/* I2C message transfer tracepoints 1/* I2C and SMBUS message transfer tracepoints
2 * 2 *
3 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved. 3 * Copyright (C) 2013 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com) 4 * Written by David Howells (dhowells@redhat.com)
@@ -144,6 +144,228 @@ TRACE_EVENT_FN(i2c_result,
144 i2c_transfer_trace_reg, 144 i2c_transfer_trace_reg,
145 i2c_transfer_trace_unreg); 145 i2c_transfer_trace_unreg);
146 146
147/*
148 * i2c_smbus_xfer() write data or procedure call request
149 */
150TRACE_EVENT_CONDITION(smbus_write,
151 TP_PROTO(const struct i2c_adapter *adap,
152 u16 addr, unsigned short flags,
153 char read_write, u8 command, int protocol,
154 const union i2c_smbus_data *data),
155 TP_ARGS(adap, addr, flags, read_write, command, protocol, data),
156 TP_CONDITION(read_write == I2C_SMBUS_WRITE ||
157 protocol == I2C_SMBUS_PROC_CALL ||
158 protocol == I2C_SMBUS_BLOCK_PROC_CALL),
159 TP_STRUCT__entry(
160 __field(int, adapter_nr )
161 __field(__u16, addr )
162 __field(__u16, flags )
163 __field(__u8, command )
164 __field(__u8, len )
165 __field(__u32, protocol )
166 __array(__u8, buf, I2C_SMBUS_BLOCK_MAX + 2) ),
167 TP_fast_assign(
168 __entry->adapter_nr = adap->nr;
169 __entry->addr = addr;
170 __entry->flags = flags;
171 __entry->command = command;
172 __entry->protocol = protocol;
173
174 switch (protocol) {
175 case I2C_SMBUS_BYTE_DATA:
176 __entry->len = 1;
177 goto copy;
178 case I2C_SMBUS_WORD_DATA:
179 case I2C_SMBUS_PROC_CALL:
180 __entry->len = 2;
181 goto copy;
182 case I2C_SMBUS_BLOCK_DATA:
183 case I2C_SMBUS_BLOCK_PROC_CALL:
184 case I2C_SMBUS_I2C_BLOCK_DATA:
185 __entry->len = data->block[0] + 1;
186 copy:
187 memcpy(__entry->buf, data->block, __entry->len);
188 break;
189 case I2C_SMBUS_QUICK:
190 case I2C_SMBUS_BYTE:
191 case I2C_SMBUS_I2C_BLOCK_BROKEN:
192 default:
193 __entry->len = 0;
194 }
195 ),
196 TP_printk("i2c-%d a=%03x f=%04x c=%x %s l=%u [%*phD]",
197 __entry->adapter_nr,
198 __entry->addr,
199 __entry->flags,
200 __entry->command,
201 __print_symbolic(__entry->protocol,
202 { I2C_SMBUS_QUICK, "QUICK" },
203 { I2C_SMBUS_BYTE, "BYTE" },
204 { I2C_SMBUS_BYTE_DATA, "BYTE_DATA" },
205 { I2C_SMBUS_WORD_DATA, "WORD_DATA" },
206 { I2C_SMBUS_PROC_CALL, "PROC_CALL" },
207 { I2C_SMBUS_BLOCK_DATA, "BLOCK_DATA" },
208 { I2C_SMBUS_I2C_BLOCK_BROKEN, "I2C_BLOCK_BROKEN" },
209 { I2C_SMBUS_BLOCK_PROC_CALL, "BLOCK_PROC_CALL" },
210 { I2C_SMBUS_I2C_BLOCK_DATA, "I2C_BLOCK_DATA" }),
211 __entry->len,
212 __entry->len, __entry->buf
213 ));
214
215/*
216 * i2c_smbus_xfer() read data request
217 */
218TRACE_EVENT_CONDITION(smbus_read,
219 TP_PROTO(const struct i2c_adapter *adap,
220 u16 addr, unsigned short flags,
221 char read_write, u8 command, int protocol),
222 TP_ARGS(adap, addr, flags, read_write, command, protocol),
223 TP_CONDITION(!(read_write == I2C_SMBUS_WRITE ||
224 protocol == I2C_SMBUS_PROC_CALL ||
225 protocol == I2C_SMBUS_BLOCK_PROC_CALL)),
226 TP_STRUCT__entry(
227 __field(int, adapter_nr )
228 __field(__u16, flags )
229 __field(__u16, addr )
230 __field(__u8, command )
231 __field(__u32, protocol )
232 __array(__u8, buf, I2C_SMBUS_BLOCK_MAX + 2) ),
233 TP_fast_assign(
234 __entry->adapter_nr = adap->nr;
235 __entry->addr = addr;
236 __entry->flags = flags;
237 __entry->command = command;
238 __entry->protocol = protocol;
239 ),
240 TP_printk("i2c-%d a=%03x f=%04x c=%x %s",
241 __entry->adapter_nr,
242 __entry->addr,
243 __entry->flags,
244 __entry->command,
245 __print_symbolic(__entry->protocol,
246 { I2C_SMBUS_QUICK, "QUICK" },
247 { I2C_SMBUS_BYTE, "BYTE" },
248 { I2C_SMBUS_BYTE_DATA, "BYTE_DATA" },
249 { I2C_SMBUS_WORD_DATA, "WORD_DATA" },
250 { I2C_SMBUS_PROC_CALL, "PROC_CALL" },
251 { I2C_SMBUS_BLOCK_DATA, "BLOCK_DATA" },
252 { I2C_SMBUS_I2C_BLOCK_BROKEN, "I2C_BLOCK_BROKEN" },
253 { I2C_SMBUS_BLOCK_PROC_CALL, "BLOCK_PROC_CALL" },
254 { I2C_SMBUS_I2C_BLOCK_DATA, "I2C_BLOCK_DATA" })
255 ));
256
257/*
258 * i2c_smbus_xfer() read data or procedure call reply
259 */
260TRACE_EVENT_CONDITION(smbus_reply,
261 TP_PROTO(const struct i2c_adapter *adap,
262 u16 addr, unsigned short flags,
263 char read_write, u8 command, int protocol,
264 const union i2c_smbus_data *data),
265 TP_ARGS(adap, addr, flags, read_write, command, protocol, data),
266 TP_CONDITION(read_write == I2C_SMBUS_READ),
267 TP_STRUCT__entry(
268 __field(int, adapter_nr )
269 __field(__u16, addr )
270 __field(__u16, flags )
271 __field(__u8, command )
272 __field(__u8, len )
273 __field(__u32, protocol )
274 __array(__u8, buf, I2C_SMBUS_BLOCK_MAX + 2) ),
275 TP_fast_assign(
276 __entry->adapter_nr = adap->nr;
277 __entry->addr = addr;
278 __entry->flags = flags;
279 __entry->command = command;
280 __entry->protocol = protocol;
281
282 switch (protocol) {
283 case I2C_SMBUS_BYTE:
284 case I2C_SMBUS_BYTE_DATA:
285 __entry->len = 1;
286 goto copy;
287 case I2C_SMBUS_WORD_DATA:
288 case I2C_SMBUS_PROC_CALL:
289 __entry->len = 2;
290 goto copy;
291 case I2C_SMBUS_BLOCK_DATA:
292 case I2C_SMBUS_BLOCK_PROC_CALL:
293 case I2C_SMBUS_I2C_BLOCK_DATA:
294 __entry->len = data->block[0] + 1;
295 copy:
296 memcpy(__entry->buf, data->block, __entry->len);
297 break;
298 case I2C_SMBUS_QUICK:
299 case I2C_SMBUS_I2C_BLOCK_BROKEN:
300 default:
301 __entry->len = 0;
302 }
303 ),
304 TP_printk("i2c-%d a=%03x f=%04x c=%x %s l=%u [%*phD]",
305 __entry->adapter_nr,
306 __entry->addr,
307 __entry->flags,
308 __entry->command,
309 __print_symbolic(__entry->protocol,
310 { I2C_SMBUS_QUICK, "QUICK" },
311 { I2C_SMBUS_BYTE, "BYTE" },
312 { I2C_SMBUS_BYTE_DATA, "BYTE_DATA" },
313 { I2C_SMBUS_WORD_DATA, "WORD_DATA" },
314 { I2C_SMBUS_PROC_CALL, "PROC_CALL" },
315 { I2C_SMBUS_BLOCK_DATA, "BLOCK_DATA" },
316 { I2C_SMBUS_I2C_BLOCK_BROKEN, "I2C_BLOCK_BROKEN" },
317 { I2C_SMBUS_BLOCK_PROC_CALL, "BLOCK_PROC_CALL" },
318 { I2C_SMBUS_I2C_BLOCK_DATA, "I2C_BLOCK_DATA" }),
319 __entry->len,
320 __entry->len, __entry->buf
321 ));
322
323/*
324 * i2c_smbus_xfer() result
325 */
326TRACE_EVENT(smbus_result,
327 TP_PROTO(const struct i2c_adapter *adap,
328 u16 addr, unsigned short flags,
329 char read_write, u8 command, int protocol,
330 int res),
331 TP_ARGS(adap, addr, flags, read_write, command, protocol, res),
332 TP_STRUCT__entry(
333 __field(int, adapter_nr )
334 __field(__u16, addr )
335 __field(__u16, flags )
336 __field(__u8, read_write )
337 __field(__u8, command )
338 __field(__s16, res )
339 __field(__u32, protocol )
340 ),
341 TP_fast_assign(
342 __entry->adapter_nr = adap->nr;
343 __entry->addr = addr;
344 __entry->flags = flags;
345 __entry->read_write = read_write;
346 __entry->command = command;
347 __entry->protocol = protocol;
348 __entry->res = res;
349 ),
350 TP_printk("i2c-%d a=%03x f=%04x c=%x %s %s res=%d",
351 __entry->adapter_nr,
352 __entry->addr,
353 __entry->flags,
354 __entry->command,
355 __print_symbolic(__entry->protocol,
356 { I2C_SMBUS_QUICK, "QUICK" },
357 { I2C_SMBUS_BYTE, "BYTE" },
358 { I2C_SMBUS_BYTE_DATA, "BYTE_DATA" },
359 { I2C_SMBUS_WORD_DATA, "WORD_DATA" },
360 { I2C_SMBUS_PROC_CALL, "PROC_CALL" },
361 { I2C_SMBUS_BLOCK_DATA, "BLOCK_DATA" },
362 { I2C_SMBUS_I2C_BLOCK_BROKEN, "I2C_BLOCK_BROKEN" },
363 { I2C_SMBUS_BLOCK_PROC_CALL, "BLOCK_PROC_CALL" },
364 { I2C_SMBUS_I2C_BLOCK_DATA, "I2C_BLOCK_DATA" }),
365 __entry->read_write == I2C_SMBUS_WRITE ? "wr" : "rd",
366 __entry->res
367 ));
368
147#endif /* _TRACE_I2C_H */ 369#endif /* _TRACE_I2C_H */
148 370
149/* This part must be outside protection */ 371/* This part must be outside protection */
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-10 08:34:16 -0500