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freebsd-dev/sys/dev/firewire/fwcrom.c
Pedro F. Giffuni df57947f08 spdx: initial adoption of licensing ID tags. 
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133
2017-11-18 14:26:50 +00:00

631 lines
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/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2002-2003
* Hidetoshi Shimokawa. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Hidetoshi Shimokawa.
*
* 4. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#ifdef __FreeBSD__
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#endif
#include <sys/param.h>
#ifdef _BOOT
#include <stand.h>
#include <bootstrap.h>
#else
#if defined(_KERNEL) || defined(TEST)
#include <sys/queue.h>
#endif
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/kernel.h>
#else
#include <netinet/in.h>
#include <fcntl.h>
#include <stdio.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#endif
#endif
#include <dev/firewire/firewire.h>
#include <dev/firewire/iec13213.h>
#define MAX_ROM (1024 - sizeof(uint32_t) * 5)
#define CROM_END(cc) ((vm_offset_t)(cc)->stack[0].dir + MAX_ROM - 1)
void
crom_init_context(struct crom_context *cc, uint32_t *p)
{
struct csrhdr *hdr;
hdr = (struct csrhdr *)p;
if (hdr->info_len <= 1) {
/* minimum or invalid ROM */
cc->depth = -1;
return;
}
p += 1 + hdr->info_len;
/* check size of root directory */
if (((struct csrdirectory *)p)->crc_len == 0) {
cc->depth = -1;
return;
}
cc->depth = 0;
cc->stack[0].dir = (struct csrdirectory *)p;
cc->stack[0].index = 0;
}
struct csrreg *
crom_get(struct crom_context *cc)
{
struct crom_ptr *ptr;
ptr = &cc->stack[cc->depth];
return (&ptr->dir->entry[ptr->index]);
}
void
crom_next(struct crom_context *cc)
{
struct crom_ptr *ptr;
struct csrreg *reg;
if (cc->depth < 0)
return;
reg = crom_get(cc);
if ((reg->key & CSRTYPE_MASK) == CSRTYPE_D) {
if (cc->depth >= CROM_MAX_DEPTH) {
printf("crom_next: too deep\n");
goto again;
}
cc->depth++;
ptr = &cc->stack[cc->depth];
ptr->dir = (struct csrdirectory *) (reg + reg->val);
ptr->index = 0;
goto check;
}
again:
ptr = &cc->stack[cc->depth];
ptr->index++;
check:
if (ptr->index < ptr->dir->crc_len &&
(vm_offset_t)crom_get(cc) <= CROM_END(cc))
return;
if (ptr->index < ptr->dir->crc_len)
printf("crom_next: bound check failed\n");
if (cc->depth > 0) {
cc->depth--;
goto again;
}
/* no more data */
cc->depth = -1;
}
struct csrreg *
crom_search_key(struct crom_context *cc, uint8_t key)
{
struct csrreg *reg;
while (cc->depth >= 0) {
reg = crom_get(cc);
if (reg->key == key)
return reg;
crom_next(cc);
}
return NULL;
}
int
crom_has_specver(uint32_t *p, uint32_t spec, uint32_t ver)
{
struct csrreg *reg;
struct crom_context c, *cc;
int state = 0;
cc = &c;
crom_init_context(cc, p);
while (cc->depth >= 0) {
reg = crom_get(cc);
if (state == 0) {
if (reg->key == CSRKEY_SPEC && reg->val == spec)
state = 1;
else
state = 0;
} else {
if (reg->key == CSRKEY_VER && reg->val == ver)
return 1;
else
state = 0;
}
crom_next(cc);
}
return 0;
}
void
crom_parse_text(struct crom_context *cc, char *buf, int len)
{
struct csrreg *reg;
struct csrtext *textleaf;
uint32_t *bp;
int i, qlen;
static char *nullstr = "(null)";
if (cc->depth < 0)
return;
reg = crom_get(cc);
if (reg->key != CROM_TEXTLEAF ||
(vm_offset_t)(reg + reg->val) > CROM_END(cc)) {
strncpy(buf, nullstr, len);
return;
}
textleaf = (struct csrtext *)(reg + reg->val);
if ((vm_offset_t)textleaf + textleaf->crc_len > CROM_END(cc)) {
strncpy(buf, nullstr, len);
return;
}
/* XXX should check spec and type */
bp = (uint32_t *)&buf[0];
qlen = textleaf->crc_len - 2;
if (len < qlen * 4)
qlen = len/4;
for (i = 0; i < qlen; i++)
*bp++ = ntohl(textleaf->text[i]);
/* make sure to terminate the string */
if (len <= qlen * 4)
buf[len - 1] = 0;
else
buf[qlen * 4] = 0;
}
uint16_t
crom_crc(uint32_t *ptr, int len)
{
int i, shift;
uint32_t data, sum, crc = 0;
for (i = 0; i < len; i++) {
data = ptr[i];
for (shift = 28; shift >= 0; shift -= 4) {
sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ sum;
}
crc &= 0xffff;
}
return ((uint16_t) crc);
}
#if !defined(_KERNEL) && !defined(_BOOT)
static void
crom_desc_specver(uint32_t spec, uint32_t ver, char *buf, int len)
{
char *s = NULL;
if (spec == CSRVAL_ANSIT10 || spec == 0) {
switch (ver) {
case CSRVAL_T10SBP2:
s = "SBP-2";
break;
default:
if (spec != 0)
s = "unknown ANSIT10";
}
}
if (spec == CSRVAL_1394TA || spec == 0) {
switch (ver) {
case CSR_PROTAVC:
s = "AV/C";
break;
case CSR_PROTCAL:
s = "CAL";
break;
case CSR_PROTEHS:
s = "EHS";
break;
case CSR_PROTHAVI:
s = "HAVi";
break;
case CSR_PROTCAM104:
s = "1394 Cam 1.04";
break;
case CSR_PROTCAM120:
s = "1394 Cam 1.20";
break;
case CSR_PROTCAM130:
s = "1394 Cam 1.30";
break;
case CSR_PROTDPP:
s = "1394 Direct print";
break;
case CSR_PROTIICP:
s = "Industrial & Instrument";
break;
default:
if (spec != 0)
s = "unknown 1394TA";
}
}
if (s != NULL)
snprintf(buf, len, "%s", s);
}
char *
crom_desc(struct crom_context *cc, char *buf, int len)
{
struct csrreg *reg;
struct csrdirectory *dir;
char *desc;
uint16_t crc;
reg = crom_get(cc);
switch (reg->key & CSRTYPE_MASK) {
case CSRTYPE_I:
#if 0
len -= snprintf(buf, len, "%d", reg->val);
buf += strlen(buf);
#else
*buf = '\0';
#endif
break;
case CSRTYPE_C:
len -= snprintf(buf, len, "offset=0x%04x(%d)",
reg->val, reg->val);
buf += strlen(buf);
break;
case CSRTYPE_L:
/* XXX fall through */
case CSRTYPE_D:
dir = (struct csrdirectory *)(reg + reg->val);
crc = crom_crc((uint32_t *)&dir->entry[0], dir->crc_len);
len -= snprintf(buf, len, "len=%d crc=0x%04x(%s) ",
dir->crc_len, dir->crc,
(crc == dir->crc) ? "OK" : "NG");
buf += strlen(buf);
}
switch (reg->key) {
case 0x03:
desc = "module_vendor_ID";
break;
case 0x04:
desc = "hardware_version";
break;
case 0x0c:
desc = "node_capabilities";
break;
case 0x12:
desc = "unit_spec_ID";
break;
case 0x13:
desc = "unit_sw_version";
crom_desc_specver(0, reg->val, buf, len);
break;
case 0x14:
desc = "logical_unit_number";
break;
case 0x17:
desc = "model_ID";
break;
case 0x38:
desc = "command_set_spec_ID";
break;
case 0x39:
desc = "command_set";
break;
case 0x3a:
desc = "unit_characteristics";
break;
case 0x3b:
desc = "command_set_revision";
break;
case 0x3c:
desc = "firmware_revision";
break;
case 0x3d:
desc = "reconnect_timeout";
break;
case 0x54:
desc = "management_agent";
break;
case 0x81:
desc = "text_leaf";
crom_parse_text(cc, buf + strlen(buf), len);
break;
case 0xd1:
desc = "unit_directory";
break;
case 0xd4:
desc = "logical_unit_directory";
break;
default:
desc = "unknown";
}
return desc;
}
#endif
#if defined(_KERNEL) || defined(_BOOT) || defined(TEST)
int
crom_add_quad(struct crom_chunk *chunk, uint32_t entry)
{
int index;
index = chunk->data.crc_len;
if (index >= CROM_MAX_CHUNK_LEN - 1) {
printf("too large chunk %d\n", index);
return (-1);
}
chunk->data.buf[index] = entry;
chunk->data.crc_len++;
return (index);
}
int
crom_add_entry(struct crom_chunk *chunk, int key, int val)
{
union
{
struct csrreg reg;
uint32_t i;
} foo;
foo.reg.key = key;
foo.reg.val = val;
return (crom_add_quad(chunk, foo.i));
}
int
crom_add_chunk(struct crom_src *src, struct crom_chunk *parent,
struct crom_chunk *child, int key)
{
int index;
if (parent == NULL) {
STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
return (0);
}
index = crom_add_entry(parent, key, 0);
if (index < 0) {
return (-1);
}
child->ref_chunk = parent;
child->ref_index = index;
STAILQ_INSERT_TAIL(&src->chunk_list, child, link);
return (index);
}
#define MAX_TEXT ((CROM_MAX_CHUNK_LEN + 1) * 4 - sizeof(struct csrtext))
int
crom_add_simple_text(struct crom_src *src, struct crom_chunk *parent,
struct crom_chunk *chunk, char *buf)
{
struct csrtext *tl;
uint32_t *p;
int len, i;
char t[MAX_TEXT];
len = strlen(buf);
if (len > MAX_TEXT) {
printf("text(%d) truncated to %td.\n", len, MAX_TEXT);
len = MAX_TEXT;
}
tl = (struct csrtext *) &chunk->data;
tl->crc_len = howmany(sizeof(struct csrtext) + len, sizeof(uint32_t));
tl->spec_id = 0;
tl->spec_type = 0;
tl->lang_id = 0;
bzero(&t[0], roundup2(len, sizeof(uint32_t)));
bcopy(buf, &t[0], len);
p = (uint32_t *)&t[0];
for (i = 0; i < howmany(len, sizeof(uint32_t)); i++)
tl->text[i] = ntohl(*p++);
return (crom_add_chunk(src, parent, chunk, CROM_TEXTLEAF));
}
static int
crom_copy(uint32_t *src, uint32_t *dst, int *offset, int len, int maxlen)
{
if (*offset + len > maxlen) {
printf("Config. ROM is too large for the buffer\n");
return (-1);
}
bcopy(src, (char *)(dst + *offset), len * sizeof(uint32_t));
*offset += len;
return (0);
}
int
crom_load(struct crom_src *src, uint32_t *buf, int maxlen)
{
struct crom_chunk *chunk, *parent;
struct csrhdr *hdr;
#if defined(_KERNEL) || defined(_BOOT)
uint32_t *ptr;
int i;
#endif
int count, offset;
int len;
offset = 0;
/* Determine offset */
STAILQ_FOREACH(chunk, &src->chunk_list, link) {
chunk->offset = offset;
/* Assume the offset of the parent is already known */
parent = chunk->ref_chunk;
if (parent != NULL) {
struct csrreg *reg;
reg = (struct csrreg *)
&parent->data.buf[chunk->ref_index];
reg->val = offset -
(parent->offset + 1 + chunk->ref_index);
}
offset += 1 + chunk->data.crc_len;
}
/* Calculate CRC and dump to the buffer */
len = 1 + src->hdr.info_len;
count = 0;
if (crom_copy((uint32_t *)&src->hdr, buf, &count, len, maxlen) < 0)
return (-1);
STAILQ_FOREACH(chunk, &src->chunk_list, link) {
chunk->data.crc =
crom_crc(&chunk->data.buf[0], chunk->data.crc_len);
len = 1 + chunk->data.crc_len;
if (crom_copy((uint32_t *)&chunk->data, buf,
&count, len, maxlen) < 0)
return (-1);
}
hdr = (struct csrhdr *)buf;
hdr->crc_len = count - 1;
hdr->crc = crom_crc(&buf[1], hdr->crc_len);
#if defined(_KERNEL) || defined(_BOOT)
/* byte swap */
ptr = buf;
for (i = 0; i < count; i++) {
*ptr = htonl(*ptr);
ptr++;
}
#endif
return (count);
}
#endif
#ifdef TEST
int
main()
{
struct crom_src src;
struct crom_chunk root,unit1,unit2,unit3;
struct crom_chunk text1,text2,text3,text4,text5,text6,text7;
uint32_t buf[256], *p;
int i;
bzero(&src, sizeof(src));
bzero(&root, sizeof(root));
bzero(&unit1, sizeof(unit1));
bzero(&unit2, sizeof(unit2));
bzero(&unit3, sizeof(unit3));
bzero(&text1, sizeof(text1));
bzero(&text2, sizeof(text2));
bzero(&text3, sizeof(text3));
bzero(&text3, sizeof(text4));
bzero(&text3, sizeof(text5));
bzero(&text3, sizeof(text6));
bzero(&text3, sizeof(text7));
bzero(buf, sizeof(buf));
/* BUS info sample */
src.hdr.info_len = 4;
src.businfo.bus_name = CSR_BUS_NAME_IEEE1394;
src.businfo.eui64.hi = 0x11223344;
src.businfo.eui64.lo = 0x55667788;
src.businfo.link_spd = FWSPD_S400;
src.businfo.generation = 0;
src.businfo.max_rom = MAXROM_4;
src.businfo.max_rec = 10;
src.businfo.cyc_clk_acc = 100;
src.businfo.pmc = 0;
src.businfo.bmc = 1;
src.businfo.isc = 1;
src.businfo.cmc = 1;
src.businfo.irmc = 1;
STAILQ_INIT(&src.chunk_list);
/* Root directory */
crom_add_chunk(&src, NULL, &root, 0);
crom_add_entry(&root, CSRKEY_NCAP, 0x123456);
/* private company_id */
crom_add_entry(&root, CSRKEY_VENDOR, 0xacde48);
crom_add_simple_text(&src, &root, &text1, "FreeBSD");
crom_add_entry(&root, CSRKEY_HW, __FreeBSD_version);
crom_add_simple_text(&src, &root, &text2, "FreeBSD-5");
/* SBP unit directory */
crom_add_chunk(&src, &root, &unit1, CROM_UDIR);
crom_add_entry(&unit1, CSRKEY_SPEC, CSRVAL_ANSIT10);
crom_add_entry(&unit1, CSRKEY_VER, CSRVAL_T10SBP2);
crom_add_entry(&unit1, CSRKEY_COM_SPEC, CSRVAL_ANSIT10);
crom_add_entry(&unit1, CSRKEY_COM_SET, CSRVAL_SCSI);
/* management_agent */
crom_add_entry(&unit1, CROM_MGM, 0x1000);
crom_add_entry(&unit1, CSRKEY_UNIT_CH, (10<<8) | 8);
/* Device type and LUN */
crom_add_entry(&unit1, CROM_LUN, 0);
crom_add_entry(&unit1, CSRKEY_MODEL, 1);
crom_add_simple_text(&src, &unit1, &text3, "scsi_target");
/* RFC2734 IPv4 over IEEE1394 */
crom_add_chunk(&src, &root, &unit2, CROM_UDIR);
crom_add_entry(&unit2, CSRKEY_SPEC, CSRVAL_IETF);
crom_add_simple_text(&src, &unit2, &text4, "IANA");
crom_add_entry(&unit2, CSRKEY_VER, 1);
crom_add_simple_text(&src, &unit2, &text5, "IPv4");
/* RFC3146 IPv6 over IEEE1394 */
crom_add_chunk(&src, &root, &unit3, CROM_UDIR);
crom_add_entry(&unit3, CSRKEY_SPEC, CSRVAL_IETF);
crom_add_simple_text(&src, &unit3, &text6, "IANA");
crom_add_entry(&unit3, CSRKEY_VER, 2);
crom_add_simple_text(&src, &unit3, &text7, "IPv6");
crom_load(&src, buf, 256);
p = buf;
#define DUMP_FORMAT "%08x %08x %08x %08x %08x %08x %08x %08x\n"
for (i = 0; i < 256/8; i++) {
printf(DUMP_FORMAT,
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
p += 8;
}
return (0);
}
#endif
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