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/*-
* Copyright (c) 2018 Netflix, Inc.
* Written by: Scott Long <scottl@freebsd.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$FreeBSD$");
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <err.h>
#include <libutil.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "mpsutil.h"
MPS_TABLE(top, debug);
struct mps_dumpreq_hdr {
uint32_t smid;
uint32_t state;
uint32_t numframes;
uint32_t deschi;
uint32_t desclo;
};
static int find_sgl(char *);
static void print_sgl(char *, int, int);
#define MPS_FRAME_LEN 128
static int
debug_dumpreqs(int ac, char **av)
{
struct mps_dumpreq_hdr *hdr;
char *buf, sysctlbuf[128];
size_t len;
int numframes, error, offset;
len = 0;
buf = NULL;
snprintf(sysctlbuf, sizeof(sysctlbuf), "dev.%s.%d.dump_reqs",
is_mps ? "mps" : "mpr", mps_unit);
error = sysctlbyname(sysctlbuf, NULL, &len, NULL, 0);
if (error)
return (error);
if (len == 0)
return (0);
buf = malloc(len);
if (buf == NULL)
return (ENOMEM);
error = sysctlbyname(sysctlbuf, buf, &len, NULL, 0);
if (error) {
printf("len= %zd, error= %d errno= %d\n", len, error, errno);
return (error);
}
while (len >= MPS_FRAME_LEN) {
hdr = (struct mps_dumpreq_hdr *)buf;
numframes = hdr->numframes;
printf("SMID= %d state= %#x numframes= %d desc.hi= %#08x "
"desc.lo= %#08x\n", hdr->smid, hdr->state,
hdr->numframes, hdr->deschi, hdr->desclo);
buf += sizeof(struct mps_dumpreq_hdr);
len -= sizeof(struct mps_dumpreq_hdr);
if ((offset = find_sgl(buf)) != -1)
print_sgl(buf, offset, numframes);
buf += MPS_FRAME_LEN * numframes;
len -= MPS_FRAME_LEN * numframes;
}
return (error);
}
static int
find_sgl(char *buf)
{
MPI2_REQUEST_HEADER *req;
MPI2_SCSI_IO_REQUEST *scsi;
int offset = 0;
req = (MPI2_REQUEST_HEADER *)buf;
switch (req->Function) {
case MPI2_FUNCTION_SCSI_IO_REQUEST:
scsi = (MPI2_SCSI_IO_REQUEST *)buf;
offset = scsi->SGLOffset0;
break;
default:
offset = -1;
}
return (offset);
}
#define SGL_FLAGS "\10LastElement\7EndOfBuffer\4Local\3Host2IOC\2Addr64\1EndOfList"
static void
print_sgl(char *buf, int offset, int numframes)
{
MPI2_SGE_SIMPLE64 *sge;
MPI2_SGE_CHAIN_UNION *sgc;
MPI2_REQUEST_HEADER *req;
u_int i = 0, flags;
char *frame, tmpbuf[128];
req = (MPI2_REQUEST_HEADER *)buf;
frame = (char *)buf;
sge = (MPI2_SGE_SIMPLE64 *)&frame[offset * 4];
printf("SGL for command\n");
hexdump(frame, MPS_FRAME_LEN, NULL, 0);
while (frame != NULL) {
flags = sge->FlagsLength >> MPI2_SGE_FLAGS_SHIFT;
bzero(tmpbuf, sizeof(tmpbuf));
mps_parse_flags(flags, SGL_FLAGS, tmpbuf, sizeof(tmpbuf));
printf("seg%d flags=%x %s len= 0x%06x addr=0x%016jx\n", i,
flags, tmpbuf, sge->FlagsLength & 0xffffff,
mps_to_u64(&sge->Address));
if (flags & (MPI2_SGE_FLAGS_END_OF_LIST |
MPI2_SGE_FLAGS_END_OF_BUFFER))
break;
sge++;
i++;
if (flags & MPI2_SGE_FLAGS_LAST_ELEMENT) {
sgc = (MPI2_SGE_CHAIN_UNION *)sge;
if ((sgc->Flags & MPI2_SGE_FLAGS_CHAIN_ELEMENT) == 0) {
printf("Invalid chain element\n");
break;
}
bzero(tmpbuf, sizeof(tmpbuf));
mps_parse_flags(sgc->Flags, SGL_FLAGS, tmpbuf,
sizeof(tmpbuf));
if (sgc->Flags & MPI2_SGE_FLAGS_64_BIT_ADDRESSING)
printf("chain64 flags=0x%x %s len=0x%x "
"Offset=0x%x addr=0x%016jx\n", sgc->Flags,
tmpbuf, sgc->Length, sgc->NextChainOffset,
mps_to_u64(&sgc->u.Address64));
else
printf("chain32 flags=0x%x %s len=0x%x "
"Offset=0x%x addr=0x%08x\n", sgc->Flags,
tmpbuf, sgc->Length, sgc->NextChainOffset,
sgc->u.Address32);
if (--numframes <= 0)
break;
frame += MPS_FRAME_LEN;
sge = (MPI2_SGE_SIMPLE64 *)frame;
hexdump(frame, MPS_FRAME_LEN, NULL, 0);
}
}
}
MPS_COMMAND(debug, dumpreqs, debug_dumpreqs, "", "Dump the active request queue")
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