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