xref: /openbmc/linux/drivers/scsi/scsi_trace.c (revision 3cef5948)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2010 FUJITSU LIMITED
4  * Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
5  */
6 #include <linux/kernel.h>
7 #include <linux/trace_seq.h>
8 #include <asm/unaligned.h>
9 #include <trace/events/scsi.h>
10 
11 #define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
12 #define SERVICE_ACTION32(cdb) (get_unaligned_be16(&cdb[8]))
13 
14 static const char *
15 scsi_trace_misc(struct trace_seq *, unsigned char *, int);
16 
17 static const char *
scsi_trace_rw6(struct trace_seq * p,unsigned char * cdb,int len)18 scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
19 {
20 	const char *ret = trace_seq_buffer_ptr(p);
21 	u32 lba, txlen;
22 
23 	lba = get_unaligned_be24(&cdb[1]) & 0x1fffff;
24 	/*
25 	 * From SBC-2: a TRANSFER LENGTH field set to zero specifies that 256
26 	 * logical blocks shall be read (READ(6)) or written (WRITE(6)).
27 	 */
28 	txlen = cdb[4] ? cdb[4] : 256;
29 
30 	trace_seq_printf(p, "lba=%u txlen=%u", lba, txlen);
31 	trace_seq_putc(p, 0);
32 
33 	return ret;
34 }
35 
36 static const char *
scsi_trace_rw10(struct trace_seq * p,unsigned char * cdb,int len)37 scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
38 {
39 	const char *ret = trace_seq_buffer_ptr(p);
40 	u32 lba, txlen;
41 
42 	lba = get_unaligned_be32(&cdb[2]);
43 	txlen = get_unaligned_be16(&cdb[7]);
44 
45 	trace_seq_printf(p, "lba=%u txlen=%u protect=%u", lba, txlen,
46 			 cdb[1] >> 5);
47 
48 	if (cdb[0] == WRITE_SAME)
49 		trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
50 
51 	trace_seq_putc(p, 0);
52 
53 	return ret;
54 }
55 
56 static const char *
scsi_trace_rw12(struct trace_seq * p,unsigned char * cdb,int len)57 scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
58 {
59 	const char *ret = trace_seq_buffer_ptr(p);
60 	u32 lba, txlen;
61 
62 	lba = get_unaligned_be32(&cdb[2]);
63 	txlen = get_unaligned_be32(&cdb[6]);
64 
65 	trace_seq_printf(p, "lba=%u txlen=%u protect=%u", lba, txlen,
66 			 cdb[1] >> 5);
67 	trace_seq_putc(p, 0);
68 
69 	return ret;
70 }
71 
72 static const char *
scsi_trace_rw16(struct trace_seq * p,unsigned char * cdb,int len)73 scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
74 {
75 	const char *ret = trace_seq_buffer_ptr(p);
76 	u64 lba;
77 	u32 txlen;
78 
79 	lba = get_unaligned_be64(&cdb[2]);
80 	txlen = get_unaligned_be32(&cdb[10]);
81 
82 	trace_seq_printf(p, "lba=%llu txlen=%u protect=%u", lba, txlen,
83 			 cdb[1] >> 5);
84 
85 	if (cdb[0] == WRITE_SAME_16)
86 		trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
87 
88 	trace_seq_putc(p, 0);
89 
90 	return ret;
91 }
92 
93 static const char *
scsi_trace_rw32(struct trace_seq * p,unsigned char * cdb,int len)94 scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
95 {
96 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
97 	u64 lba;
98 	u32 ei_lbrt, txlen;
99 
100 	switch (SERVICE_ACTION32(cdb)) {
101 	case READ_32:
102 		cmd = "READ";
103 		break;
104 	case VERIFY_32:
105 		cmd = "VERIFY";
106 		break;
107 	case WRITE_32:
108 		cmd = "WRITE";
109 		break;
110 	case WRITE_SAME_32:
111 		cmd = "WRITE_SAME";
112 		break;
113 	default:
114 		trace_seq_puts(p, "UNKNOWN");
115 		goto out;
116 	}
117 
118 	lba = get_unaligned_be64(&cdb[12]);
119 	ei_lbrt = get_unaligned_be32(&cdb[20]);
120 	txlen = get_unaligned_be32(&cdb[28]);
121 
122 	trace_seq_printf(p, "%s_32 lba=%llu txlen=%u protect=%u ei_lbrt=%u",
123 			 cmd, lba, txlen, cdb[10] >> 5, ei_lbrt);
124 
125 	if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
126 		trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
127 
128 out:
129 	trace_seq_putc(p, 0);
130 
131 	return ret;
132 }
133 
134 static const char *
scsi_trace_unmap(struct trace_seq * p,unsigned char * cdb,int len)135 scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
136 {
137 	const char *ret = trace_seq_buffer_ptr(p);
138 	unsigned int regions = get_unaligned_be16(&cdb[7]);
139 
140 	trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
141 	trace_seq_putc(p, 0);
142 
143 	return ret;
144 }
145 
146 static const char *
scsi_trace_service_action_in(struct trace_seq * p,unsigned char * cdb,int len)147 scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
148 {
149 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
150 	u64 lba;
151 	u32 alloc_len;
152 
153 	switch (SERVICE_ACTION16(cdb)) {
154 	case SAI_READ_CAPACITY_16:
155 		cmd = "READ_CAPACITY_16";
156 		break;
157 	case SAI_GET_LBA_STATUS:
158 		cmd = "GET_LBA_STATUS";
159 		break;
160 	default:
161 		trace_seq_puts(p, "UNKNOWN");
162 		goto out;
163 	}
164 
165 	lba = get_unaligned_be64(&cdb[2]);
166 	alloc_len = get_unaligned_be32(&cdb[10]);
167 
168 	trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd, lba, alloc_len);
169 
170 out:
171 	trace_seq_putc(p, 0);
172 
173 	return ret;
174 }
175 
176 static const char *
scsi_trace_maintenance_in(struct trace_seq * p,unsigned char * cdb,int len)177 scsi_trace_maintenance_in(struct trace_seq *p, unsigned char *cdb, int len)
178 {
179 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
180 	u32 alloc_len;
181 
182 	switch (SERVICE_ACTION16(cdb)) {
183 	case MI_REPORT_IDENTIFYING_INFORMATION:
184 		cmd = "REPORT_IDENTIFYING_INFORMATION";
185 		break;
186 	case MI_REPORT_TARGET_PGS:
187 		cmd = "REPORT_TARGET_PORT_GROUPS";
188 		break;
189 	case MI_REPORT_ALIASES:
190 		cmd = "REPORT_ALIASES";
191 		break;
192 	case MI_REPORT_SUPPORTED_OPERATION_CODES:
193 		cmd = "REPORT_SUPPORTED_OPERATION_CODES";
194 		break;
195 	case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
196 		cmd = "REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS";
197 		break;
198 	case MI_REPORT_PRIORITY:
199 		cmd = "REPORT_PRIORITY";
200 		break;
201 	case MI_REPORT_TIMESTAMP:
202 		cmd = "REPORT_TIMESTAMP";
203 		break;
204 	case MI_MANAGEMENT_PROTOCOL_IN:
205 		cmd = "MANAGEMENT_PROTOCOL_IN";
206 		break;
207 	default:
208 		trace_seq_puts(p, "UNKNOWN");
209 		goto out;
210 	}
211 
212 	alloc_len = get_unaligned_be32(&cdb[6]);
213 
214 	trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
215 
216 out:
217 	trace_seq_putc(p, 0);
218 
219 	return ret;
220 }
221 
222 static const char *
scsi_trace_maintenance_out(struct trace_seq * p,unsigned char * cdb,int len)223 scsi_trace_maintenance_out(struct trace_seq *p, unsigned char *cdb, int len)
224 {
225 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
226 	u32 alloc_len;
227 
228 	switch (SERVICE_ACTION16(cdb)) {
229 	case MO_SET_IDENTIFYING_INFORMATION:
230 		cmd = "SET_IDENTIFYING_INFORMATION";
231 		break;
232 	case MO_SET_TARGET_PGS:
233 		cmd = "SET_TARGET_PORT_GROUPS";
234 		break;
235 	case MO_CHANGE_ALIASES:
236 		cmd = "CHANGE_ALIASES";
237 		break;
238 	case MO_SET_PRIORITY:
239 		cmd = "SET_PRIORITY";
240 		break;
241 	case MO_SET_TIMESTAMP:
242 		cmd = "SET_TIMESTAMP";
243 		break;
244 	case MO_MANAGEMENT_PROTOCOL_OUT:
245 		cmd = "MANAGEMENT_PROTOCOL_OUT";
246 		break;
247 	default:
248 		trace_seq_puts(p, "UNKNOWN");
249 		goto out;
250 	}
251 
252 	alloc_len = get_unaligned_be32(&cdb[6]);
253 
254 	trace_seq_printf(p, "%s alloc_len=%u", cmd, alloc_len);
255 
256 out:
257 	trace_seq_putc(p, 0);
258 
259 	return ret;
260 }
261 
262 static const char *
scsi_trace_zbc_in(struct trace_seq * p,unsigned char * cdb,int len)263 scsi_trace_zbc_in(struct trace_seq *p, unsigned char *cdb, int len)
264 {
265 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
266 	u64 zone_id;
267 	u32 alloc_len;
268 	u8 options;
269 
270 	switch (SERVICE_ACTION16(cdb)) {
271 	case ZI_REPORT_ZONES:
272 		cmd = "REPORT_ZONES";
273 		break;
274 	default:
275 		trace_seq_puts(p, "UNKNOWN");
276 		goto out;
277 	}
278 
279 	zone_id = get_unaligned_be64(&cdb[2]);
280 	alloc_len = get_unaligned_be32(&cdb[10]);
281 	options = cdb[14] & 0x3f;
282 
283 	trace_seq_printf(p, "%s zone=%llu alloc_len=%u options=%u partial=%u",
284 			 cmd, (unsigned long long)zone_id, alloc_len,
285 			 options, (cdb[14] >> 7) & 1);
286 
287 out:
288 	trace_seq_putc(p, 0);
289 
290 	return ret;
291 }
292 
293 static const char *
scsi_trace_zbc_out(struct trace_seq * p,unsigned char * cdb,int len)294 scsi_trace_zbc_out(struct trace_seq *p, unsigned char *cdb, int len)
295 {
296 	const char *ret = trace_seq_buffer_ptr(p), *cmd;
297 	u64 zone_id;
298 
299 	switch (SERVICE_ACTION16(cdb)) {
300 	case ZO_CLOSE_ZONE:
301 		cmd = "CLOSE_ZONE";
302 		break;
303 	case ZO_FINISH_ZONE:
304 		cmd = "FINISH_ZONE";
305 		break;
306 	case ZO_OPEN_ZONE:
307 		cmd = "OPEN_ZONE";
308 		break;
309 	case ZO_RESET_WRITE_POINTER:
310 		cmd = "RESET_WRITE_POINTER";
311 		break;
312 	default:
313 		trace_seq_puts(p, "UNKNOWN");
314 		goto out;
315 	}
316 
317 	zone_id = get_unaligned_be64(&cdb[2]);
318 
319 	trace_seq_printf(p, "%s zone=%llu all=%u", cmd,
320 			 (unsigned long long)zone_id, cdb[14] & 1);
321 
322 out:
323 	trace_seq_putc(p, 0);
324 
325 	return ret;
326 }
327 
328 static const char *
scsi_trace_varlen(struct trace_seq * p,unsigned char * cdb,int len)329 scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
330 {
331 	switch (SERVICE_ACTION32(cdb)) {
332 	case READ_32:
333 	case VERIFY_32:
334 	case WRITE_32:
335 	case WRITE_SAME_32:
336 		return scsi_trace_rw32(p, cdb, len);
337 	default:
338 		return scsi_trace_misc(p, cdb, len);
339 	}
340 }
341 
342 static const char *
scsi_trace_misc(struct trace_seq * p,unsigned char * cdb,int len)343 scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
344 {
345 	const char *ret = trace_seq_buffer_ptr(p);
346 
347 	trace_seq_putc(p, '-');
348 	trace_seq_putc(p, 0);
349 
350 	return ret;
351 }
352 
353 const char *
scsi_trace_parse_cdb(struct trace_seq * p,unsigned char * cdb,int len)354 scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
355 {
356 	switch (cdb[0]) {
357 	case READ_6:
358 	case WRITE_6:
359 		return scsi_trace_rw6(p, cdb, len);
360 	case READ_10:
361 	case VERIFY:
362 	case WRITE_10:
363 	case WRITE_SAME:
364 		return scsi_trace_rw10(p, cdb, len);
365 	case READ_12:
366 	case VERIFY_12:
367 	case WRITE_12:
368 		return scsi_trace_rw12(p, cdb, len);
369 	case READ_16:
370 	case VERIFY_16:
371 	case WRITE_16:
372 	case WRITE_SAME_16:
373 		return scsi_trace_rw16(p, cdb, len);
374 	case UNMAP:
375 		return scsi_trace_unmap(p, cdb, len);
376 	case SERVICE_ACTION_IN_16:
377 		return scsi_trace_service_action_in(p, cdb, len);
378 	case VARIABLE_LENGTH_CMD:
379 		return scsi_trace_varlen(p, cdb, len);
380 	case MAINTENANCE_IN:
381 		return scsi_trace_maintenance_in(p, cdb, len);
382 	case MAINTENANCE_OUT:
383 		return scsi_trace_maintenance_out(p, cdb, len);
384 	case ZBC_IN:
385 		return scsi_trace_zbc_in(p, cdb, len);
386 	case ZBC_OUT:
387 		return scsi_trace_zbc_out(p, cdb, len);
388 	default:
389 		return scsi_trace_misc(p, cdb, len);
390 	}
391 }
392