usr.sbin/mpsutil/mps_debug.c

   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: head/usr.sbin/mpsutil/mps_debug.c 330790 2018-03-12 05:03:32Z scottl $");
  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")