xref: /openbmc/linux/drivers/nvme/target/trace.c (revision 8d84f9de)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * NVM Express target device driver tracepoints
4  * Copyright (c) 2018 Johannes Thumshirn, SUSE Linux GmbH
5  */
6 
7 #include <asm/unaligned.h>
8 #include "trace.h"
9 
10 static const char *nvmet_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
11 {
12 	const char *ret = trace_seq_buffer_ptr(p);
13 	u8 cns = cdw10[0];
14 	u16 ctrlid = get_unaligned_le16(cdw10 + 2);
15 
16 	trace_seq_printf(p, "cns=%u, ctrlid=%u", cns, ctrlid);
17 	trace_seq_putc(p, 0);
18 
19 	return ret;
20 }
21 
22 static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
23 						 u8 *cdw10)
24 {
25 	const char *ret = trace_seq_buffer_ptr(p);
26 	u8 fid = cdw10[0];
27 	u8 sel = cdw10[1] & 0x7;
28 	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
29 
30 	trace_seq_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
31 	trace_seq_putc(p, 0);
32 
33 	return ret;
34 }
35 
36 static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
37 					     u8 *cdw10)
38 {
39 	const char *ret = trace_seq_buffer_ptr(p);
40 	u64 slba = get_unaligned_le64(cdw10);
41 	u32 mndw = get_unaligned_le32(cdw10 + 8);
42 	u16 rl = get_unaligned_le16(cdw10 + 12);
43 	u8 atype = cdw10[15];
44 
45 	trace_seq_printf(p, "slba=0x%llx, mndw=0x%x, rl=0x%x, atype=%u",
46 			slba, mndw, rl, atype);
47 	trace_seq_putc(p, 0);
48 
49 	return ret;
50 }
51 
52 static const char *nvmet_trace_admin_set_features(struct trace_seq *p,
53 						 u8 *cdw10)
54 {
55 	const char *ret = trace_seq_buffer_ptr(p);
56 	u8 fid = cdw10[0];
57 	u8 sv = cdw10[3] & 0x8;
58 	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
59 
60 	trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
61 	trace_seq_putc(p, 0);
62 
63 	return ret;
64 }
65 
66 static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
67 {
68 	const char *ret = trace_seq_buffer_ptr(p);
69 	u64 slba = get_unaligned_le64(cdw10);
70 	u16 length = get_unaligned_le16(cdw10 + 8);
71 	u16 control = get_unaligned_le16(cdw10 + 10);
72 	u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
73 	u32 reftag = get_unaligned_le32(cdw10 +  16);
74 
75 	trace_seq_printf(p,
76 			 "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
77 			 slba, length, control, dsmgmt, reftag);
78 	trace_seq_putc(p, 0);
79 
80 	return ret;
81 }
82 
83 static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
84 {
85 	const char *ret = trace_seq_buffer_ptr(p);
86 
87 	trace_seq_printf(p, "nr=%u, attributes=%u",
88 			 get_unaligned_le32(cdw10),
89 			 get_unaligned_le32(cdw10 + 4));
90 	trace_seq_putc(p, 0);
91 
92 	return ret;
93 }
94 
95 static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
96 {
97 	const char *ret = trace_seq_buffer_ptr(p);
98 
99 	trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
100 	trace_seq_putc(p, 0);
101 
102 	return ret;
103 }
104 
105 const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
106 		u8 opcode, u8 *cdw10)
107 {
108 	switch (opcode) {
109 	case nvme_admin_identify:
110 		return nvmet_trace_admin_identify(p, cdw10);
111 	case nvme_admin_set_features:
112 		return nvmet_trace_admin_set_features(p, cdw10);
113 	case nvme_admin_get_features:
114 		return nvmet_trace_admin_get_features(p, cdw10);
115 	case nvme_admin_get_lba_status:
116 		return nvmet_trace_get_lba_status(p, cdw10);
117 	default:
118 		return nvmet_trace_common(p, cdw10);
119 	}
120 }
121 
122 const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
123 		u8 opcode, u8 *cdw10)
124 {
125 	switch (opcode) {
126 	case nvme_cmd_read:
127 	case nvme_cmd_write:
128 	case nvme_cmd_write_zeroes:
129 		return nvmet_trace_read_write(p, cdw10);
130 	case nvme_cmd_dsm:
131 		return nvmet_trace_dsm(p, cdw10);
132 	default:
133 		return nvmet_trace_common(p, cdw10);
134 	}
135 }
136 
137 static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
138 		u8 *spc)
139 {
140 	const char *ret = trace_seq_buffer_ptr(p);
141 	u8 attrib = spc[0];
142 	u32 ofst = get_unaligned_le32(spc + 4);
143 	u64 value = get_unaligned_le64(spc + 8);
144 
145 	trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
146 			 attrib, ofst, value);
147 	trace_seq_putc(p, 0);
148 	return ret;
149 }
150 
151 static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
152 		u8 *spc)
153 {
154 	const char *ret = trace_seq_buffer_ptr(p);
155 	u16 recfmt = get_unaligned_le16(spc);
156 	u16 qid = get_unaligned_le16(spc + 2);
157 	u16 sqsize = get_unaligned_le16(spc + 4);
158 	u8 cattr = spc[6];
159 	u32 kato = get_unaligned_le32(spc + 8);
160 
161 	trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
162 			 recfmt, qid, sqsize, cattr, kato);
163 	trace_seq_putc(p, 0);
164 	return ret;
165 }
166 
167 static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
168 		u8 *spc)
169 {
170 	const char *ret = trace_seq_buffer_ptr(p);
171 	u8 attrib = spc[0];
172 	u32 ofst = get_unaligned_le32(spc + 4);
173 
174 	trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
175 	trace_seq_putc(p, 0);
176 	return ret;
177 }
178 
179 static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
180 {
181 	const char *ret = trace_seq_buffer_ptr(p);
182 
183 	trace_seq_printf(p, "specific=%*ph", 24, spc);
184 	trace_seq_putc(p, 0);
185 	return ret;
186 }
187 
188 const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
189 		u8 fctype, u8 *spc)
190 {
191 	switch (fctype) {
192 	case nvme_fabrics_type_property_set:
193 		return nvmet_trace_fabrics_property_set(p, spc);
194 	case nvme_fabrics_type_connect:
195 		return nvmet_trace_fabrics_connect(p, spc);
196 	case nvme_fabrics_type_property_get:
197 		return nvmet_trace_fabrics_property_get(p, spc);
198 	default:
199 		return nvmet_trace_fabrics_common(p, spc);
200 	}
201 }
202 
203 const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
204 {
205 	const char *ret = trace_seq_buffer_ptr(p);
206 
207 	if (*name)
208 		trace_seq_printf(p, "disk=%s, ", name);
209 	trace_seq_putc(p, 0);
210 
211 	return ret;
212 }
213 
214 const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
215 {
216 	const char *ret = trace_seq_buffer_ptr(p);
217 
218 	/*
219 	 * XXX: We don't know the controller instance before executing the
220 	 * connect command itself because the connect command for the admin
221 	 * queue will not provide the cntlid which will be allocated in this
222 	 * command.  In case of io queues, the controller instance will be
223 	 * mapped by the extra data of the connect command.
224 	 * If we can know the extra data of the connect command in this stage,
225 	 * we can update this print statement later.
226 	 */
227 	if (ctrl)
228 		trace_seq_printf(p, "%d", ctrl->cntlid);
229 	else
230 		trace_seq_printf(p, "_");
231 	trace_seq_putc(p, 0);
232 
233 	return ret;
234 }
235 
236