1 /*-
2 * Copyright (c) 2018 Netflix, Inc.
3 * Written by: Scott Long <[email protected]>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include <sys/param.h>
32 #include <sys/errno.h>
33 #include <sys/types.h>
34 #include <sys/sysctl.h>
35 #include <err.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40 #include "mpsutil.h"
41
42 MPS_TABLE(top, debug);
43
44 struct mps_dumpreq_hdr {
45 uint32_t smid;
46 uint32_t state;
47 uint32_t numframes;
48 uint32_t deschi;
49 uint32_t desclo;
50 };
51
52 static int find_sgl(char *);
53 static void print_sgl(char *, int, int);
54
55 #define MPS_FRAME_LEN 128
56
57 static int
debug_dumpreqs(int ac,char ** av)58 debug_dumpreqs(int ac, char **av)
59 {
60 struct mps_dumpreq_hdr *hdr;
61 char *buf, sysctlbuf[128];
62 size_t len;
63 int numframes, error, offset;
64
65 len = 0;
66 buf = NULL;
67 snprintf(sysctlbuf, sizeof(sysctlbuf), "dev.%s.%d.dump_reqs",
68 is_mps ? "mps" : "mpr", mps_unit);
69
70 error = sysctlbyname(sysctlbuf, NULL, &len, NULL, 0);
71 if (error)
72 return (error);
73
74 if (len == 0)
75 return (0);
76
77 buf = malloc(len);
78 if (buf == NULL)
79 return (ENOMEM);
80
81 error = sysctlbyname(sysctlbuf, buf, &len, NULL, 0);
82 if (error) {
83 printf("len= %zd, error= %d errno= %d\n", len, error, errno);
84 return (error);
85 }
86
87 while (len >= MPS_FRAME_LEN) {
88 hdr = (struct mps_dumpreq_hdr *)buf;
89 numframes = hdr->numframes;
90
91 printf("SMID= %d state= %#x numframes= %d desc.hi= %#08x "
92 "desc.lo= %#08x\n", hdr->smid, hdr->state,
93 hdr->numframes, hdr->deschi, hdr->desclo);
94
95 buf += sizeof(struct mps_dumpreq_hdr);
96 len -= sizeof(struct mps_dumpreq_hdr);
97
98 if ((offset = find_sgl(buf)) != -1)
99 print_sgl(buf, offset, numframes);
100
101 buf += MPS_FRAME_LEN * numframes;
102 len -= MPS_FRAME_LEN * numframes;
103 }
104
105 return (error);
106 }
107
108 static int
find_sgl(char * buf)109 find_sgl(char *buf)
110 {
111 MPI2_REQUEST_HEADER *req;
112 MPI2_SCSI_IO_REQUEST *scsi;
113 int offset = 0;
114
115 req = (MPI2_REQUEST_HEADER *)buf;
116
117 switch (req->Function) {
118 case MPI2_FUNCTION_SCSI_IO_REQUEST:
119 scsi = (MPI2_SCSI_IO_REQUEST *)buf;
120 offset = scsi->SGLOffset0;
121 break;
122 default:
123 offset = -1;
124 }
125
126 return (offset);
127 }
128
129 #define SGL_FLAGS "\10LastElement\7EndOfBuffer\4Local\3Host2IOC\2Addr64\1EndOfList"
130
131 static void
print_sgl(char * buf,int offset,int numframes)132 print_sgl(char *buf, int offset, int numframes)
133 {
134 MPI2_SGE_SIMPLE64 *sge;
135 MPI2_SGE_CHAIN_UNION *sgc;
136 u_int i = 0, flags;
137 char *frame, tmpbuf[128];
138
139 frame = (char *)buf;
140 sge = (MPI2_SGE_SIMPLE64 *)&frame[offset * 4];
141 printf("SGL for command\n");
142
143 hexdump(frame, MPS_FRAME_LEN, NULL, 0);
144 while (frame != NULL) {
145 flags = sge->FlagsLength >> MPI2_SGE_FLAGS_SHIFT;
146 bzero(tmpbuf, sizeof(tmpbuf));
147 mps_parse_flags(flags, SGL_FLAGS, tmpbuf, sizeof(tmpbuf));
148 printf("seg%d flags=%x %s len= 0x%06x addr=0x%016jx\n", i,
149 flags, tmpbuf, sge->FlagsLength & 0xffffff,
150 mps_to_u64(&sge->Address));
151 if (flags & (MPI2_SGE_FLAGS_END_OF_LIST |
152 MPI2_SGE_FLAGS_END_OF_BUFFER))
153 break;
154 sge++;
155 i++;
156 if (flags & MPI2_SGE_FLAGS_LAST_ELEMENT) {
157 sgc = (MPI2_SGE_CHAIN_UNION *)sge;
158 if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) {
159 printf("Invalid chain element\n");
160 break;
161 }
162 bzero(tmpbuf, sizeof(tmpbuf));
163 mps_parse_flags(sgc->Flags, SGL_FLAGS, tmpbuf,
164 sizeof(tmpbuf));
165 if (sgc->Flags & MPI2_SGE_FLAGS_64_BIT_ADDRESSING)
166 printf("chain64 flags=0x%x %s len=0x%x "
167 "Offset=0x%x addr=0x%016jx\n", sgc->Flags,
168 tmpbuf, sgc->Length, sgc->NextChainOffset,
169 mps_to_u64(&sgc->u.Address64));
170 else
171 printf("chain32 flags=0x%x %s len=0x%x "
172 "Offset=0x%x addr=0x%08x\n", sgc->Flags,
173 tmpbuf, sgc->Length, sgc->NextChainOffset,
174 sgc->u.Address32);
175 if (--numframes <= 0)
176 break;
177 frame += MPS_FRAME_LEN;
178 sge = (MPI2_SGE_SIMPLE64 *)frame;
179 hexdump(frame, MPS_FRAME_LEN, NULL, 0);
180 }
181 }
182 }
183
184 MPS_COMMAND(debug, dumpreqs, debug_dumpreqs, "", "Dump the active request queue")
185