1 /*- 2 * Copyright (c) 2018 Netflix, Inc. 3 * Written by: Scott Long <scottl@freebsd.org> 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 __RCSID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/errno.h> 35 #include <sys/types.h> 36 #include <sys/sysctl.h> 37 #include <err.h> 38 #include <libutil.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include "mpsutil.h" 44 45 MPS_TABLE(top, debug); 46 47 struct mps_dumpreq_hdr { 48 uint32_t smid; 49 uint32_t state; 50 uint32_t numframes; 51 uint32_t deschi; 52 uint32_t desclo; 53 }; 54 55 static int find_sgl(char *); 56 static void print_sgl(char *, int, int); 57 58 #define MPS_FRAME_LEN 128 59 60 static int 61 debug_dumpreqs(int ac, char **av) 62 { 63 struct mps_dumpreq_hdr *hdr; 64 char *buf, sysctlbuf[128]; 65 size_t len; 66 int numframes, error, offset; 67 68 len = 0; 69 buf = NULL; 70 snprintf(sysctlbuf, sizeof(sysctlbuf), "dev.%s.%d.dump_reqs", 71 is_mps ? "mps" : "mpr", mps_unit); 72 73 error = sysctlbyname(sysctlbuf, NULL, &len, NULL, 0); 74 if (error) 75 return (error); 76 77 if (len == 0) 78 return (0); 79 80 buf = malloc(len); 81 if (buf == NULL) 82 return (ENOMEM); 83 84 error = sysctlbyname(sysctlbuf, buf, &len, NULL, 0); 85 if (error) { 86 printf("len= %zd, error= %d errno= %d\n", len, error, errno); 87 return (error); 88 } 89 90 while (len >= MPS_FRAME_LEN) { 91 hdr = (struct mps_dumpreq_hdr *)buf; 92 numframes = hdr->numframes; 93 94 printf("SMID= %d state= %#x numframes= %d desc.hi= %#08x " 95 "desc.lo= %#08x\n", hdr->smid, hdr->state, 96 hdr->numframes, hdr->deschi, hdr->desclo); 97 98 buf += sizeof(struct mps_dumpreq_hdr); 99 len -= sizeof(struct mps_dumpreq_hdr); 100 101 if ((offset = find_sgl(buf)) != -1) 102 print_sgl(buf, offset, numframes); 103 104 buf += MPS_FRAME_LEN * numframes; 105 len -= MPS_FRAME_LEN * numframes; 106 } 107 108 return (error); 109 } 110 111 static int 112 find_sgl(char *buf) 113 { 114 MPI2_REQUEST_HEADER *req; 115 MPI2_SCSI_IO_REQUEST *scsi; 116 int offset = 0; 117 118 req = (MPI2_REQUEST_HEADER *)buf; 119 120 switch (req->Function) { 121 case MPI2_FUNCTION_SCSI_IO_REQUEST: 122 scsi = (MPI2_SCSI_IO_REQUEST *)buf; 123 offset = scsi->SGLOffset0; 124 break; 125 default: 126 offset = -1; 127 } 128 129 return (offset); 130 } 131 132 #define SGL_FLAGS "\10LastElement\7EndOfBuffer\4Local\3Host2IOC\2Addr64\1EndOfList" 133 134 static void 135 print_sgl(char *buf, int offset, int numframes) 136 { 137 MPI2_SGE_SIMPLE64 *sge; 138 MPI2_SGE_CHAIN_UNION *sgc; 139 u_int i = 0, flags; 140 char *frame, tmpbuf[128]; 141 142 frame = (char *)buf; 143 sge = (MPI2_SGE_SIMPLE64 *)&frame[offset * 4]; 144 printf("SGL for command\n"); 145 146 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 147 while (frame != NULL) { 148 flags = sge->FlagsLength >> MPI2_SGE_FLAGS_SHIFT; 149 bzero(tmpbuf, sizeof(tmpbuf)); 150 mps_parse_flags(flags, SGL_FLAGS, tmpbuf, sizeof(tmpbuf)); 151 printf("seg%d flags=%x %s len= 0x%06x addr=0x%016jx\n", i, 152 flags, tmpbuf, sge->FlagsLength & 0xffffff, 153 mps_to_u64(&sge->Address)); 154 if (flags & (MPI2_SGE_FLAGS_END_OF_LIST | 155 MPI2_SGE_FLAGS_END_OF_BUFFER)) 156 break; 157 sge++; 158 i++; 159 if (flags & MPI2_SGE_FLAGS_LAST_ELEMENT) { 160 sgc = (MPI2_SGE_CHAIN_UNION *)sge; 161 if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) { 162 printf("Invalid chain element\n"); 163 break; 164 } 165 bzero(tmpbuf, sizeof(tmpbuf)); 166 mps_parse_flags(sgc->Flags, SGL_FLAGS, tmpbuf, 167 sizeof(tmpbuf)); 168 if (sgc->Flags & MPI2_SGE_FLAGS_64_BIT_ADDRESSING) 169 printf("chain64 flags=0x%x %s len=0x%x " 170 "Offset=0x%x addr=0x%016jx\n", sgc->Flags, 171 tmpbuf, sgc->Length, sgc->NextChainOffset, 172 mps_to_u64(&sgc->u.Address64)); 173 else 174 printf("chain32 flags=0x%x %s len=0x%x " 175 "Offset=0x%x addr=0x%08x\n", sgc->Flags, 176 tmpbuf, sgc->Length, sgc->NextChainOffset, 177 sgc->u.Address32); 178 if (--numframes <= 0) 179 break; 180 frame += MPS_FRAME_LEN; 181 sge = (MPI2_SGE_SIMPLE64 *)frame; 182 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 183 } 184 } 185 } 186 187 MPS_COMMAND(debug, dumpreqs, debug_dumpreqs, "", "Dump the active request queue") 188