Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
10static 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
22static 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
36static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
37{
38 const char *ret = trace_seq_buffer_ptr(p);
39 u64 slba = get_unaligned_le64(cdw10);
40 u16 length = get_unaligned_le16(cdw10 + 8);
41 u16 control = get_unaligned_le16(cdw10 + 10);
42 u32 dsmgmt = get_unaligned_le32(cdw10 + 12);
43 u32 reftag = get_unaligned_le32(cdw10 + 16);
44
45 trace_seq_printf(p,
46 "slba=%llu, len=%u, ctrl=0x%x, dsmgmt=%u, reftag=%u",
47 slba, length, control, dsmgmt, reftag);
48 trace_seq_putc(p, 0);
49
50 return ret;
51}
52
53static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10)
54{
55 const char *ret = trace_seq_buffer_ptr(p);
56
57 trace_seq_printf(p, "nr=%u, attributes=%u",
58 get_unaligned_le32(cdw10),
59 get_unaligned_le32(cdw10 + 4));
60 trace_seq_putc(p, 0);
61
62 return ret;
63}
64
65static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10)
66{
67 const char *ret = trace_seq_buffer_ptr(p);
68
69 trace_seq_printf(p, "cdw10=%*ph", 24, cdw10);
70 trace_seq_putc(p, 0);
71
72 return ret;
73}
74
75const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
76 u8 opcode, u8 *cdw10)
77{
78 switch (opcode) {
79 case nvme_admin_identify:
80 return nvmet_trace_admin_identify(p, cdw10);
81 case nvme_admin_get_features:
82 return nvmet_trace_admin_get_features(p, cdw10);
83 default:
84 return nvmet_trace_common(p, cdw10);
85 }
86}
87
88const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p,
89 u8 opcode, u8 *cdw10)
90{
91 switch (opcode) {
92 case nvme_cmd_read:
93 case nvme_cmd_write:
94 case nvme_cmd_write_zeroes:
95 return nvmet_trace_read_write(p, cdw10);
96 case nvme_cmd_dsm:
97 return nvmet_trace_dsm(p, cdw10);
98 default:
99 return nvmet_trace_common(p, cdw10);
100 }
101}
102
103static const char *nvmet_trace_fabrics_property_set(struct trace_seq *p,
104 u8 *spc)
105{
106 const char *ret = trace_seq_buffer_ptr(p);
107 u8 attrib = spc[0];
108 u32 ofst = get_unaligned_le32(spc + 4);
109 u64 value = get_unaligned_le64(spc + 8);
110
111 trace_seq_printf(p, "attrib=%u, ofst=0x%x, value=0x%llx",
112 attrib, ofst, value);
113 trace_seq_putc(p, 0);
114 return ret;
115}
116
117static const char *nvmet_trace_fabrics_connect(struct trace_seq *p,
118 u8 *spc)
119{
120 const char *ret = trace_seq_buffer_ptr(p);
121 u16 recfmt = get_unaligned_le16(spc);
122 u16 qid = get_unaligned_le16(spc + 2);
123 u16 sqsize = get_unaligned_le16(spc + 4);
124 u8 cattr = spc[6];
125 u32 kato = get_unaligned_le32(spc + 8);
126
127 trace_seq_printf(p, "recfmt=%u, qid=%u, sqsize=%u, cattr=%u, kato=%u",
128 recfmt, qid, sqsize, cattr, kato);
129 trace_seq_putc(p, 0);
130 return ret;
131}
132
133static const char *nvmet_trace_fabrics_property_get(struct trace_seq *p,
134 u8 *spc)
135{
136 const char *ret = trace_seq_buffer_ptr(p);
137 u8 attrib = spc[0];
138 u32 ofst = get_unaligned_le32(spc + 4);
139
140 trace_seq_printf(p, "attrib=%u, ofst=0x%x", attrib, ofst);
141 trace_seq_putc(p, 0);
142 return ret;
143}
144
145static const char *nvmet_trace_fabrics_common(struct trace_seq *p, u8 *spc)
146{
147 const char *ret = trace_seq_buffer_ptr(p);
148
149 trace_seq_printf(p, "specific=%*ph", 24, spc);
150 trace_seq_putc(p, 0);
151 return ret;
152}
153
154const char *nvmet_trace_parse_fabrics_cmd(struct trace_seq *p,
155 u8 fctype, u8 *spc)
156{
157 switch (fctype) {
158 case nvme_fabrics_type_property_set:
159 return nvmet_trace_fabrics_property_set(p, spc);
160 case nvme_fabrics_type_connect:
161 return nvmet_trace_fabrics_connect(p, spc);
162 case nvme_fabrics_type_property_get:
163 return nvmet_trace_fabrics_property_get(p, spc);
164 default:
165 return nvmet_trace_fabrics_common(p, spc);
166 }
167}
168
169const char *nvmet_trace_disk_name(struct trace_seq *p, char *name)
170{
171 const char *ret = trace_seq_buffer_ptr(p);
172
173 if (*name)
174 trace_seq_printf(p, "disk=%s, ", name);
175 trace_seq_putc(p, 0);
176
177 return ret;
178}
179
180const char *nvmet_trace_ctrl_name(struct trace_seq *p, struct nvmet_ctrl *ctrl)
181{
182 const char *ret = trace_seq_buffer_ptr(p);
183
184 /*
185 * XXX: We don't know the controller instance before executing the
186 * connect command itself because the connect command for the admin
187 * queue will not provide the cntlid which will be allocated in this
188 * command. In case of io queues, the controller instance will be
189 * mapped by the extra data of the connect command.
190 * If we can know the extra data of the connect command in this stage,
191 * we can update this print statement later.
192 */
193 if (ctrl)
194 trace_seq_printf(p, "%d", ctrl->cntlid);
195 else
196 trace_seq_printf(p, "_");
197 trace_seq_putc(p, 0);
198
199 return ret;
200}
201