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/param.h> 31 #include <sys/errno.h> 32 #include <sys/types.h> 33 #include <sys/sysctl.h> 34 #include <err.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 #include "mpsutil.h" 40 41 MPS_TABLE(top, debug); 42 43 struct mps_dumpreq_hdr { 44 uint32_t smid; 45 uint32_t state; 46 uint32_t numframes; 47 uint32_t deschi; 48 uint32_t desclo; 49 }; 50 51 static int find_sgl(char *); 52 static void print_sgl(char *, int, int); 53 54 #define MPS_FRAME_LEN 128 55 56 static int 57 debug_dumpreqs(int ac, char **av) 58 { 59 struct mps_dumpreq_hdr *hdr; 60 char *buf, sysctlbuf[128]; 61 size_t len; 62 int numframes, error, offset; 63 64 len = 0; 65 buf = NULL; 66 snprintf(sysctlbuf, sizeof(sysctlbuf), "dev.%s.%d.dump_reqs", 67 is_mps ? "mps" : "mpr", mps_unit); 68 69 error = sysctlbyname(sysctlbuf, NULL, &len, NULL, 0); 70 if (error) 71 return (error); 72 73 if (len == 0) 74 return (0); 75 76 buf = malloc(len); 77 if (buf == NULL) 78 return (ENOMEM); 79 80 error = sysctlbyname(sysctlbuf, buf, &len, NULL, 0); 81 if (error) { 82 printf("len= %zd, error= %d errno= %d\n", len, error, errno); 83 return (error); 84 } 85 86 while (len >= MPS_FRAME_LEN) { 87 hdr = (struct mps_dumpreq_hdr *)buf; 88 numframes = hdr->numframes; 89 90 printf("SMID= %d state= %#x numframes= %d desc.hi= %#08x " 91 "desc.lo= %#08x\n", hdr->smid, hdr->state, 92 hdr->numframes, hdr->deschi, hdr->desclo); 93 94 buf += sizeof(struct mps_dumpreq_hdr); 95 len -= sizeof(struct mps_dumpreq_hdr); 96 97 if ((offset = find_sgl(buf)) != -1) 98 print_sgl(buf, offset, numframes); 99 100 buf += MPS_FRAME_LEN * numframes; 101 len -= MPS_FRAME_LEN * numframes; 102 } 103 104 return (error); 105 } 106 107 static int 108 find_sgl(char *buf) 109 { 110 MPI2_REQUEST_HEADER *req; 111 MPI2_SCSI_IO_REQUEST *scsi; 112 int offset = 0; 113 114 req = (MPI2_REQUEST_HEADER *)buf; 115 116 switch (req->Function) { 117 case MPI2_FUNCTION_SCSI_IO_REQUEST: 118 scsi = (MPI2_SCSI_IO_REQUEST *)buf; 119 offset = scsi->SGLOffset0; 120 break; 121 default: 122 offset = -1; 123 } 124 125 return (offset); 126 } 127 128 #define SGL_FLAGS "\10LastElement\7EndOfBuffer\4Local\3Host2IOC\2Addr64\1EndOfList" 129 130 static void 131 print_sgl(char *buf, int offset, int numframes) 132 { 133 MPI2_SGE_SIMPLE64 *sge; 134 MPI2_SGE_CHAIN_UNION *sgc; 135 u_int i = 0, flags; 136 char *frame, tmpbuf[128]; 137 138 frame = (char *)buf; 139 sge = (MPI2_SGE_SIMPLE64 *)&frame[offset * 4]; 140 printf("SGL for command\n"); 141 142 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 143 while (frame != NULL) { 144 flags = sge->FlagsLength >> MPI2_SGE_FLAGS_SHIFT; 145 bzero(tmpbuf, sizeof(tmpbuf)); 146 mps_parse_flags(flags, SGL_FLAGS, tmpbuf, sizeof(tmpbuf)); 147 printf("seg%d flags=%x %s len= 0x%06x addr=0x%016jx\n", i, 148 flags, tmpbuf, sge->FlagsLength & 0xffffff, 149 mps_to_u64(&sge->Address)); 150 if (flags & (MPI2_SGE_FLAGS_END_OF_LIST | 151 MPI2_SGE_FLAGS_END_OF_BUFFER)) 152 break; 153 sge++; 154 i++; 155 if (flags & MPI2_SGE_FLAGS_LAST_ELEMENT) { 156 sgc = (MPI2_SGE_CHAIN_UNION *)sge; 157 if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) { 158 printf("Invalid chain element\n"); 159 break; 160 } 161 bzero(tmpbuf, sizeof(tmpbuf)); 162 mps_parse_flags(sgc->Flags, SGL_FLAGS, tmpbuf, 163 sizeof(tmpbuf)); 164 if (sgc->Flags & MPI2_SGE_FLAGS_64_BIT_ADDRESSING) 165 printf("chain64 flags=0x%x %s len=0x%x " 166 "Offset=0x%x addr=0x%016jx\n", sgc->Flags, 167 tmpbuf, sgc->Length, sgc->NextChainOffset, 168 mps_to_u64(&sgc->u.Address64)); 169 else 170 printf("chain32 flags=0x%x %s len=0x%x " 171 "Offset=0x%x addr=0x%08x\n", sgc->Flags, 172 tmpbuf, sgc->Length, sgc->NextChainOffset, 173 sgc->u.Address32); 174 if (--numframes <= 0) 175 break; 176 frame += MPS_FRAME_LEN; 177 sge = (MPI2_SGE_SIMPLE64 *)frame; 178 hexdump(frame, MPS_FRAME_LEN, NULL, 0); 179 } 180 } 181 } 182 183 MPS_COMMAND(debug, dumpreqs, debug_dumpreqs, "", "Dump the active request queue") 184