1 /*- 2 * Copyright (c) 2018 Netflix, Inc. 3 * All rights reserved. 4 * Written by: Scott Long <scottl@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __RCSID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/errno.h> 36 #include <sys/types.h> 37 #include <sys/sysctl.h> 38 #include <err.h> 39 #include <libutil.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include "mpsutil.h" 45 46 MPS_TABLE(top, debug); 47 48 struct mps_dumpreq_hdr { 49 uint32_t smid; 50 uint32_t state; 51 uint32_t numframes; 52 uint32_t deschi; 53 uint32_t desclo; 54 }; 55 56 static int find_sgl(char *); 57 static void print_sgl(char *, int, int); 58 59 #define MPS_FRAME_LEN 128 60 61 static int 62 debug_dumpreqs(int ac, char **av) 63 { 64 struct mps_dumpreq_hdr *hdr; 65 char *buf, sysctlbuf[128]; 66 size_t len; 67 int numframes, error, offset; 68 69 len = 0; 70 buf = NULL; 71 snprintf(sysctlbuf, sizeof(sysctlbuf), "dev.%s.%d.dump_reqs", 72 is_mps ? "mps" : "mpr", mps_unit); 73 74 error = sysctlbyname(sysctlbuf, NULL, &len, NULL, 0); 75 if (error) 76 return (error); 77 78 if (len == 0) 79 return (0); 80 81 buf = malloc(len); 82 if (buf == NULL) 83 return (ENOMEM); 84 85 error = sysctlbyname(sysctlbuf, buf, &len, NULL, 0); 86 if (error) { 87 printf("len= %zd, error= %d errno= %d\n", len, error, errno); 88 return (error); 89 } 90 91 while (len >= MPS_FRAME_LEN) { 92 hdr = (struct mps_dumpreq_hdr *)buf; 93 numframes = hdr->numframes; 94 95 printf("SMID= %d state= %#x numframes= %d desc.hi= %#08x " 96 "desc.lo= %#08x\n", hdr->smid, hdr->state, 97 hdr->numframes, hdr->deschi, hdr->desclo); 98 99 buf += sizeof(struct mps_dumpreq_hdr); 100 len -= sizeof(struct mps_dumpreq_hdr); 101 102 if ((offset = find_sgl(buf)) != -1) 103 print_sgl(buf, offset, numframes); 104 105 buf += MPS_FRAME_LEN * numframes; 106 len -= MPS_FRAME_LEN * numframes; 107 } 108 109 return (error); 110 } 111 112 static int 113 find_sgl(char *buf) 114 { 115 MPI2_REQUEST_HEADER *req; 116 MPI2_SCSI_IO_REQUEST *scsi; 117 int offset = 0; 118 119 req = (MPI2_REQUEST_HEADER *)buf; 120 121 switch (req->Function) { 122 case MPI2_FUNCTION_SCSI_IO_REQUEST: 123 scsi = (MPI2_SCSI_IO_REQUEST *)buf; 124 offset = scsi->SGLOffset0; 125 break; 126 default: 127 offset = -1; 128 } 129 130 return (offset); 131 } 132 133 #define SGL_FLAGS "\10LastElement\7EndOfBuffer\4Local\3Host2IOC\2Addr64\1EndOfList" 134 135 static void 136 print_sgl(char *buf, int offset, int numframes) 137 { 138 MPI2_SGE_SIMPLE64 *sge; 139 MPI2_SGE_CHAIN_UNION *sgc; 140 MPI2_REQUEST_HEADER *req; 141 u_int i = 0, flags; 142 char *frame, tmpbuf[128]; 143 144 req = (MPI2_REQUEST_HEADER *)buf; 145 frame = (char *)buf; 146 sge = (MPI2_SGE_SIMPLE64 *)&frame[offset * 4]; 147 printf("SGL for command\n"); 148 149 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 150 while (frame != NULL) { 151 flags = sge->FlagsLength >> MPI2_SGE_FLAGS_SHIFT; 152 bzero(tmpbuf, sizeof(tmpbuf)); 153 mps_parse_flags(flags, SGL_FLAGS, tmpbuf, sizeof(tmpbuf)); 154 printf("seg%d flags=%x %s len= 0x%06x addr=0x%016jx\n", i, 155 flags, tmpbuf, sge->FlagsLength & 0xffffff, 156 mps_to_u64(&sge->Address)); 157 if (flags & (MPI2_SGE_FLAGS_END_OF_LIST | 158 MPI2_SGE_FLAGS_END_OF_BUFFER)) 159 break; 160 sge++; 161 i++; 162 if (flags & MPI2_SGE_FLAGS_LAST_ELEMENT) { 163 sgc = (MPI2_SGE_CHAIN_UNION *)sge; 164 if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) { 165 printf("Invalid chain element\n"); 166 break; 167 } 168 bzero(tmpbuf, sizeof(tmpbuf)); 169 mps_parse_flags(sgc->Flags, SGL_FLAGS, tmpbuf, 170 sizeof(tmpbuf)); 171 if (sgc->Flags & MPI2_SGE_FLAGS_64_BIT_ADDRESSING) 172 printf("chain64 flags=0x%x %s len=0x%x " 173 "Offset=0x%x addr=0x%016jx\n", sgc->Flags, 174 tmpbuf, sgc->Length, sgc->NextChainOffset, 175 mps_to_u64(&sgc->u.Address64)); 176 else 177 printf("chain32 flags=0x%x %s len=0x%x " 178 "Offset=0x%x addr=0x%08x\n", sgc->Flags, 179 tmpbuf, sgc->Length, sgc->NextChainOffset, 180 sgc->u.Address32); 181 if (--numframes <= 0) 182 break; 183 frame += MPS_FRAME_LEN; 184 sge = (MPI2_SGE_SIMPLE64 *)frame; 185 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 186 } 187 } 188 } 189 190 MPS_COMMAND(debug, dumpreqs, debug_dumpreqs, "", "Dump the active request queue") 191