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kernel-ark/drivers/ieee1394/csr1212.c
Stefan Richter b2051f8873 ieee1394: nodemgr: check info_length in ROM header earlier 
The whole ROM area which is covered by the crc_length field of the ROM
header was fetched before the info_length field was checked for correct
general ROM format.  This might be wasteful or even dangerous with nodes
with minimal ROM, nonstandard ROM, or corrupt ROM.

Perform this check at the earliest opportunity.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-02-08 20:59:03 +01:00

1634 lines
42 KiB
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/*
* csr1212.c -- IEEE 1212 Control and Status Register support for Linux
*
* Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za>
* Steve Kinneberg <kinnebergsteve@acmsystems.com>
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/* TODO List:
* - Verify interface consistency: i.e., public functions that take a size
* parameter expect size to be in bytes.
* - Convenience functions for reading a block of data from a given offset.
*/
#ifndef __KERNEL__
#include <string.h>
#endif
#include "csr1212.h"
/* Permitted key type for each key id */
#define __I (1 << CSR1212_KV_TYPE_IMMEDIATE)
#define __C (1 << CSR1212_KV_TYPE_CSR_OFFSET)
#define __D (1 << CSR1212_KV_TYPE_DIRECTORY)
#define __L (1 << CSR1212_KV_TYPE_LEAF)
static const u_int8_t csr1212_key_id_type_map[0x30] = {
__C, /* used by Apple iSight */
__D | __L, /* Descriptor */
__I | __D | __L, /* Bus_Dependent_Info */
__I | __D | __L, /* Vendor */
__I, /* Hardware_Version */
0, 0, /* Reserved */
__D | __L | __I, /* Module */
__I, 0, 0, 0, /* used by Apple iSight, Reserved */
__I, /* Node_Capabilities */
__L, /* EUI_64 */
0, 0, 0, /* Reserved */
__D, /* Unit */
__I, /* Specifier_ID */
__I, /* Version */
__I | __C | __D | __L, /* Dependent_Info */
__L, /* Unit_Location */
0, /* Reserved */
__I, /* Model */
__D, /* Instance */
__L, /* Keyword */
__D, /* Feature */
__L, /* Extended_ROM */
__I, /* Extended_Key_Specifier_ID */
__I, /* Extended_Key */
__I | __C | __D | __L, /* Extended_Data */
__L, /* Modifiable_Descriptor */
__I, /* Directory_ID */
__I, /* Revision */
};
#undef __I
#undef __C
#undef __D
#undef __L
#define quads_to_bytes(_q) ((_q) * sizeof(u_int32_t))
#define bytes_to_quads(_b) (((_b) + sizeof(u_int32_t) - 1) / sizeof(u_int32_t))
static inline void free_keyval(struct csr1212_keyval *kv)
{
if ((kv->key.type == CSR1212_KV_TYPE_LEAF) &&
(kv->key.id != CSR1212_KV_ID_EXTENDED_ROM))
CSR1212_FREE(kv->value.leaf.data);
CSR1212_FREE(kv);
}
static u_int16_t csr1212_crc16(const u_int32_t *buffer, size_t length)
{
int shift;
u_int32_t data;
u_int16_t sum, crc = 0;
for (; length; length--) {
data = CSR1212_BE32_TO_CPU(*buffer);
buffer++;
for (shift = 28; shift >= 0; shift -= 4 ) {
sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
}
crc &= 0xffff;
}
return CSR1212_CPU_TO_BE16(crc);
}
#if 0
/* Microsoft computes the CRC with the bytes in reverse order. Therefore we
* have a special version of the CRC algorithm to account for their buggy
* software. */
static u_int16_t csr1212_msft_crc16(const u_int32_t *buffer, size_t length)
{
int shift;
u_int32_t data;
u_int16_t sum, crc = 0;
for (; length; length--) {
data = CSR1212_LE32_TO_CPU(*buffer);
buffer++;
for (shift = 28; shift >= 0; shift -= 4 ) {
sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
}
crc &= 0xffff;
}
return CSR1212_CPU_TO_BE16(crc);
}
#endif
static inline struct csr1212_dentry *csr1212_find_keyval(struct csr1212_keyval *dir,
struct csr1212_keyval *kv)
{
struct csr1212_dentry *pos;
for (pos = dir->value.directory.dentries_head;
pos != NULL; pos = pos->next) {
if (pos->kv == kv)
return pos;
}
return NULL;
}
static inline struct csr1212_keyval *csr1212_find_keyval_offset(struct csr1212_keyval *kv_list,
u_int32_t offset)
{
struct csr1212_keyval *kv;
for (kv = kv_list->next; kv && (kv != kv_list); kv = kv->next) {
if (kv->offset == offset)
return kv;
}
return NULL;
}
/* Creation Routines */
struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops,
size_t bus_info_size, void *private)
{
struct csr1212_csr *csr;
csr = CSR1212_MALLOC(sizeof(*csr));
if (!csr)
return NULL;
csr->cache_head =
csr1212_rom_cache_malloc(CSR1212_CONFIG_ROM_SPACE_OFFSET,
CSR1212_CONFIG_ROM_SPACE_SIZE);
if (!csr->cache_head) {
CSR1212_FREE(csr);
return NULL;
}
/* The keyval key id is not used for the root node, but a valid key id
* that can be used for a directory needs to be passed to
* csr1212_new_directory(). */
csr->root_kv = csr1212_new_directory(CSR1212_KV_ID_VENDOR);
if (!csr->root_kv) {
CSR1212_FREE(csr->cache_head);
CSR1212_FREE(csr);
return NULL;
}
csr->bus_info_data = csr->cache_head->data;
csr->bus_info_len = bus_info_size;
csr->crc_len = bus_info_size;
csr->ops = ops;
csr->private = private;
csr->cache_tail = csr->cache_head;
return csr;
}
void csr1212_init_local_csr(struct csr1212_csr *csr,
const u_int32_t *bus_info_data, int max_rom)
{
static const int mr_map[] = { 4, 64, 1024, 0 };
#ifdef __KERNEL__
BUG_ON(max_rom & ~0x3);
csr->max_rom = mr_map[max_rom];
#else
if (max_rom & ~0x3) /* caller supplied invalid argument */
csr->max_rom = 0;
else
csr->max_rom = mr_map[max_rom];
#endif
memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len);
}
static struct csr1212_keyval *csr1212_new_keyval(u_int8_t type, u_int8_t key)
{
struct csr1212_keyval *kv;
if (key < 0x30 && ((csr1212_key_id_type_map[key] & (1 << type)) == 0))
return NULL;
kv = CSR1212_MALLOC(sizeof(*kv));
if (!kv)
return NULL;
kv->key.type = type;
kv->key.id = key;
kv->associate = NULL;
kv->refcnt = 1;
kv->next = NULL;
kv->prev = NULL;
kv->offset = 0;
kv->valid = 0;
return kv;
}
struct csr1212_keyval *csr1212_new_immediate(u_int8_t key, u_int32_t value)
{
struct csr1212_keyval *kv = csr1212_new_keyval(CSR1212_KV_TYPE_IMMEDIATE, key);
if (!kv)
return NULL;
kv->value.immediate = value;
kv->valid = 1;
return kv;
}
struct csr1212_keyval *csr1212_new_leaf(u_int8_t key, const void *data, size_t data_len)
{
struct csr1212_keyval *kv = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, key);
if (!kv)
return NULL;
if (data_len > 0) {
kv->value.leaf.data = CSR1212_MALLOC(data_len);
if (!kv->value.leaf.data) {
CSR1212_FREE(kv);
return NULL;
}
if (data)
memcpy(kv->value.leaf.data, data, data_len);
} else {
kv->value.leaf.data = NULL;
}
kv->value.leaf.len = bytes_to_quads(data_len);
kv->offset = 0;
kv->valid = 1;
return kv;
}
struct csr1212_keyval *csr1212_new_csr_offset(u_int8_t key, u_int32_t csr_offset)
{
struct csr1212_keyval *kv = csr1212_new_keyval(CSR1212_KV_TYPE_CSR_OFFSET, key);
if (!kv)
return NULL;
kv->value.csr_offset = csr_offset;
kv->offset = 0;
kv->valid = 1;
return kv;
}
struct csr1212_keyval *csr1212_new_directory(u_int8_t key)
{
struct csr1212_keyval *kv = csr1212_new_keyval(CSR1212_KV_TYPE_DIRECTORY, key);
if (!kv)
return NULL;
kv->value.directory.len = 0;
kv->offset = 0;
kv->value.directory.dentries_head = NULL;
kv->value.directory.dentries_tail = NULL;
kv->valid = 1;
return kv;
}
int csr1212_associate_keyval(struct csr1212_keyval *kv,
struct csr1212_keyval *associate)
{
if (!kv || !associate)
return CSR1212_EINVAL;
if (kv->key.id == CSR1212_KV_ID_DESCRIPTOR ||
(associate->key.id != CSR1212_KV_ID_DESCRIPTOR &&
associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA &&
associate->key.id < 0x30))
return CSR1212_EINVAL;
if (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID &&
associate->key.id != CSR1212_KV_ID_EXTENDED_KEY)
return CSR1212_EINVAL;
if (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
associate->key.id != CSR1212_KV_ID_EXTENDED_DATA)
return CSR1212_EINVAL;
if (associate->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID)
return CSR1212_EINVAL;
if (associate->key.id == CSR1212_KV_ID_EXTENDED_DATA &&
kv->key.id != CSR1212_KV_ID_EXTENDED_KEY)
return CSR1212_EINVAL;
if (kv->associate)
csr1212_release_keyval(kv->associate);
associate->refcnt++;
kv->associate = associate;
return CSR1212_SUCCESS;
}
int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
struct csr1212_keyval *kv)
{
struct csr1212_dentry *dentry;
if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY)
return CSR1212_EINVAL;
dentry = CSR1212_MALLOC(sizeof(*dentry));
if (!dentry)
return CSR1212_ENOMEM;
dentry->kv = kv;
kv->refcnt++;
dentry->next = NULL;
dentry->prev = dir->value.directory.dentries_tail;
if (!dir->value.directory.dentries_head)
dir->value.directory.dentries_head = dentry;
if (dir->value.directory.dentries_tail)
dir->value.directory.dentries_tail->next = dentry;
dir->value.directory.dentries_tail = dentry;
return CSR1212_SUCCESS;
}
struct csr1212_keyval *csr1212_new_extended_immediate(u_int32_t spec, u_int32_t key,
u_int32_t value)
{
struct csr1212_keyval *kvs, *kvk, *kvv;
kvs = csr1212_new_immediate(CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID, spec);
kvk = csr1212_new_immediate(CSR1212_KV_ID_EXTENDED_KEY, key);
kvv = csr1212_new_immediate(CSR1212_KV_ID_EXTENDED_DATA, value);
if (!kvs || !kvk || !kvv) {
if (kvs)
free_keyval(kvs);
if (kvk)
free_keyval(kvk);
if (kvv)
free_keyval(kvv);
return NULL;
}
/* Don't keep a local reference to the extended key or value. */
kvk->refcnt = 0;
kvv->refcnt = 0;
csr1212_associate_keyval(kvk, kvv);
csr1212_associate_keyval(kvs, kvk);
return kvs;
}
struct csr1212_keyval *csr1212_new_extended_leaf(u_int32_t spec, u_int32_t key,
const void *data, size_t data_len)
{
struct csr1212_keyval *kvs, *kvk, *kvv;
kvs = csr1212_new_immediate(CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID, spec);
kvk = csr1212_new_immediate(CSR1212_KV_ID_EXTENDED_KEY, key);
kvv = csr1212_new_leaf(CSR1212_KV_ID_EXTENDED_DATA, data, data_len);
if (!kvs || !kvk || !kvv) {
if (kvs)
free_keyval(kvs);
if (kvk)
free_keyval(kvk);
if (kvv)
free_keyval(kvv);
return NULL;
}
/* Don't keep a local reference to the extended key or value. */
kvk->refcnt = 0;
kvv->refcnt = 0;
csr1212_associate_keyval(kvk, kvv);
csr1212_associate_keyval(kvs, kvk);
return kvs;
}
struct csr1212_keyval *csr1212_new_descriptor_leaf(u_int8_t dtype, u_int32_t specifier_id,
const void *data, size_t data_len)
{
struct csr1212_keyval *kv;
kv = csr1212_new_leaf(CSR1212_KV_ID_DESCRIPTOR, NULL,
data_len + CSR1212_DESCRIPTOR_LEAF_OVERHEAD);
if (!kv)
return NULL;
CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, dtype);
CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, specifier_id);
if (data) {
memcpy(CSR1212_DESCRIPTOR_LEAF_DATA(kv), data, data_len);
}
return kv;
}
struct csr1212_keyval *csr1212_new_textual_descriptor_leaf(u_int8_t cwidth,
u_int16_t cset,
u_int16_t language,
const void *data,
size_t data_len)
{
struct csr1212_keyval *kv;
char *lstr;
kv = csr1212_new_descriptor_leaf(0, 0, NULL, data_len +
CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD);
if (!kv)
return NULL;
CSR1212_TEXTUAL_DESCRIPTOR_LEAF_SET_WIDTH(kv, cwidth);
CSR1212_TEXTUAL_DESCRIPTOR_LEAF_SET_CHAR_SET(kv, cset);
CSR1212_TEXTUAL_DESCRIPTOR_LEAF_SET_LANGUAGE(kv, language);
lstr = (char*)CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv);
/* make sure last quadlet is zeroed out */
*((u_int32_t*)&(lstr[(data_len - 1) & ~0x3])) = 0;
/* don't copy the NUL terminator */
memcpy(lstr, data, data_len);
return kv;
}
static int csr1212_check_minimal_ascii(const char *s)
{
static const char minimal_ascii_table[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07,
0x00, 0x00, 0x0a, 0x00, 0x0C, 0x0D, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x20, 0x21, 0x22, 0x00, 0x00, 0x25, 0x26, 0x27,
0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0x58, 0x59, 0x5a, 0x00, 0x00, 0x00, 0x00, 0x5f,
0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0x78, 0x79, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00,
};
for (; *s; s++) {
if (minimal_ascii_table[*s & 0x7F] != *s)
return -1; /* failed */
}
/* String conforms to minimal-ascii, as specified by IEEE 1212,
* par. 7.4 */
return 0;
}
struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s)
{
/* Check if string conform to minimal_ascii format */
if (csr1212_check_minimal_ascii(s))
return NULL;
/* IEEE 1212, par. 7.5.4.1 Textual descriptors (minimal ASCII) */
return csr1212_new_textual_descriptor_leaf(0, 0, 0, s, strlen(s));
}
struct csr1212_keyval *csr1212_new_icon_descriptor_leaf(u_int32_t version,
u_int8_t palette_depth,
u_int8_t color_space,
u_int16_t language,
u_int16_t hscan,
u_int16_t vscan,
u_int32_t *palette,
u_int32_t *pixels)
{
static const int pd[4] = { 0, 4, 16, 256 };
static const int cs[16] = { 4, 2 };
struct csr1212_keyval *kv;
int palette_size;
int pixel_size = (hscan * vscan + 3) & ~0x3;
if (!pixels || (!palette && palette_depth) ||
(palette_depth & ~0x3) || (color_space & ~0xf))
return NULL;
palette_size = pd[palette_depth] * cs[color_space];
kv = csr1212_new_descriptor_leaf(1, 0, NULL,
palette_size + pixel_size +
CSR1212_ICON_DESCRIPTOR_LEAF_OVERHEAD);
if (!kv)
return NULL;
CSR1212_ICON_DESCRIPTOR_LEAF_SET_VERSION(kv, version);
CSR1212_ICON_DESCRIPTOR_LEAF_SET_PALETTE_DEPTH(kv, palette_depth);
CSR1212_ICON_DESCRIPTOR_LEAF_SET_COLOR_SPACE(kv, color_space);
CSR1212_ICON_DESCRIPTOR_LEAF_SET_LANGUAGE(kv, language);
CSR1212_ICON_DESCRIPTOR_LEAF_SET_HSCAN(kv, hscan);
CSR1212_ICON_DESCRIPTOR_LEAF_SET_VSCAN(kv, vscan);
if (palette_size)
memcpy(CSR1212_ICON_DESCRIPTOR_LEAF_PALETTE(kv), palette,
palette_size);
memcpy(CSR1212_ICON_DESCRIPTOR_LEAF_PIXELS(kv), pixels, pixel_size);
return kv;
}
struct csr1212_keyval *csr1212_new_modifiable_descriptor_leaf(u_int16_t max_size,
u_int64_t address)
{
struct csr1212_keyval *kv;
/* IEEE 1212, par. 7.5.4.3 Modifiable descriptors */
kv = csr1212_new_leaf(CSR1212_KV_ID_MODIFIABLE_DESCRIPTOR, NULL, sizeof(u_int64_t));
if(!kv)
return NULL;
CSR1212_MODIFIABLE_DESCRIPTOR_SET_MAX_SIZE(kv, max_size);
CSR1212_MODIFIABLE_DESCRIPTOR_SET_ADDRESS_HI(kv, address);
CSR1212_MODIFIABLE_DESCRIPTOR_SET_ADDRESS_LO(kv, address);
return kv;
}
static int csr1212_check_keyword(const char *s)
{
for (; *s; s++) {
if (('A' <= *s) && (*s <= 'Z'))
continue;
if (('0' <= *s) && (*s <= '9'))
continue;
if (*s == '-')
continue;
return -1; /* failed */
}
/* String conforms to keyword, as specified by IEEE 1212,
* par. 7.6.5 */
return CSR1212_SUCCESS;
}
struct csr1212_keyval *csr1212_new_keyword_leaf(int strc, const char *strv[])
{
struct csr1212_keyval *kv;
char *buffer;
int i, data_len = 0;
/* Check all keywords to see if they conform to restrictions:
* Only the following characters is allowed ['A'..'Z','0'..'9','-']
* Each word is zero-terminated.
* Also calculate the total length of the keywords.
*/
for (i = 0; i < strc; i++) {
if (!strv[i] || csr1212_check_keyword(strv[i])) {
return NULL;
}
data_len += strlen(strv[i]) + 1; /* Add zero-termination char. */
}
/* IEEE 1212, par. 7.6.5 Keyword leaves */
kv = csr1212_new_leaf(CSR1212_KV_ID_KEYWORD, NULL, data_len);
if (!kv)
return NULL;
buffer = (char *)kv->value.leaf.data;
/* make sure last quadlet is zeroed out */
*((u_int32_t*)&(buffer[(data_len - 1) & ~0x3])) = 0;
/* Copy keyword(s) into leaf data buffer */
for (i = 0; i < strc; i++) {
int len = strlen(strv[i]) + 1;
memcpy(buffer, strv[i], len);
buffer += len;
}
return kv;
}
/* Destruction Routines */
void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir,
struct csr1212_keyval *kv)
{
struct csr1212_dentry *dentry;
if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY)
return;
dentry = csr1212_find_keyval(dir, kv);
if (!dentry)
return;
if (dentry->prev)
dentry->prev->next = dentry->next;
if (dentry->next)
dentry->next->prev = dentry->prev;
if (dir->value.directory.dentries_head == dentry)
dir->value.directory.dentries_head = dentry->next;
if (dir->value.directory.dentries_tail == dentry)
dir->value.directory.dentries_tail = dentry->prev;
CSR1212_FREE(dentry);
csr1212_release_keyval(kv);
}
void csr1212_disassociate_keyval(struct csr1212_keyval *kv)
{
if (kv->associate) {
csr1212_release_keyval(kv->associate);
}
kv->associate = NULL;
}
/* This function is used to free the memory taken by a keyval. If the given
* keyval is a directory type, then any keyvals contained in that directory
* will be destroyed as well if their respective refcnts are 0. By means of
* list manipulation, this routine will descend a directory structure in a
* non-recursive manner. */
void _csr1212_destroy_keyval(struct csr1212_keyval *kv)
{
struct csr1212_keyval *k, *a;
struct csr1212_dentry dentry;
struct csr1212_dentry *head, *tail;
dentry.kv = kv;
dentry.next = NULL;
dentry.prev = NULL;
head = &dentry;
tail = head;
while (head) {
k = head->kv;
while (k) {
k->refcnt--;
if (k->refcnt > 0)
break;
a = k->associate;
if (k->key.type == CSR1212_KV_TYPE_DIRECTORY) {
/* If the current entry is a directory, then move all
* the entries to the destruction list. */
if (k->value.directory.dentries_head) {
tail->next = k->value.directory.dentries_head;
k->value.directory.dentries_head->prev = tail;
tail = k->value.directory.dentries_tail;
}
}
free_keyval(k);
k = a;
}
head = head->next;
if (head) {
if (head->prev && head->prev != &dentry) {
CSR1212_FREE(head->prev);
}
head->prev = NULL;
} else if (tail != &dentry)
CSR1212_FREE(tail);
}
}
void csr1212_destroy_csr(struct csr1212_csr *csr)
{
struct csr1212_csr_rom_cache *c, *oc;
struct csr1212_cache_region *cr, *ocr;
csr1212_release_keyval(csr->root_kv);
c = csr->cache_head;
while (c) {
oc = c;
cr = c->filled_head;
while (cr) {
ocr = cr;
cr = cr->next;
CSR1212_FREE(ocr);
}
c = c->next;
CSR1212_FREE(oc);
}
CSR1212_FREE(csr);
}
/* CSR Image Creation */
static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize)
{
struct csr1212_csr_rom_cache *cache;
u_int64_t csr_addr;
if (!csr || !csr->ops || !csr->ops->allocate_addr_range ||
!csr->ops->release_addr || csr->max_rom < 1)
return CSR1212_EINVAL;
/* ROM size must be a multiple of csr->max_rom */
romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1);
csr_addr = csr->ops->allocate_addr_range(romsize, csr->max_rom, csr->private);
if (csr_addr == CSR1212_INVALID_ADDR_SPACE) {
return CSR1212_ENOMEM;
}
if (csr_addr < CSR1212_REGISTER_SPACE_BASE) {
/* Invalid address returned from allocate_addr_range(). */
csr->ops->release_addr(csr_addr, csr->private);
return CSR1212_ENOMEM;
}
cache = csr1212_rom_cache_malloc(csr_addr - CSR1212_REGISTER_SPACE_BASE, romsize);
if (!cache) {
csr->ops->release_addr(csr_addr, csr->private);
return CSR1212_ENOMEM;
}
cache->ext_rom = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, CSR1212_KV_ID_EXTENDED_ROM);
if (!cache->ext_rom) {
csr->ops->release_addr(csr_addr, csr->private);
CSR1212_FREE(cache);
return CSR1212_ENOMEM;
}
if (csr1212_attach_keyval_to_directory(csr->root_kv, cache->ext_rom) != CSR1212_SUCCESS) {
csr1212_release_keyval(cache->ext_rom);
csr->ops->release_addr(csr_addr, csr->private);
CSR1212_FREE(cache);
return CSR1212_ENOMEM;
}
cache->ext_rom->offset = csr_addr - CSR1212_REGISTER_SPACE_BASE;
cache->ext_rom->value.leaf.len = -1;
cache->ext_rom->value.leaf.data = cache->data;
/* Add cache to tail of cache list */
cache->prev = csr->cache_tail;
csr->cache_tail->next = cache;
csr->cache_tail = cache;
return CSR1212_SUCCESS;
}
static inline void csr1212_remove_cache(struct csr1212_csr *csr,
struct csr1212_csr_rom_cache *cache)
{
if (csr->cache_head == cache)
csr->cache_head = cache->next;
if (csr->cache_tail == cache)
csr->cache_tail = cache->prev;
if (cache->prev)
cache->prev->next = cache->next;
if (cache->next)
cache->next->prev = cache->prev;
if (cache->ext_rom) {
csr1212_detach_keyval_from_directory(csr->root_kv, cache->ext_rom);
csr1212_release_keyval(cache->ext_rom);
}
CSR1212_FREE(cache);
}
static int csr1212_generate_layout_subdir(struct csr1212_keyval *dir,
struct csr1212_keyval **layout_tail)
{
struct csr1212_dentry *dentry;
struct csr1212_keyval *dkv;
struct csr1212_keyval *last_extkey_spec = NULL;
struct csr1212_keyval *last_extkey = NULL;
int num_entries = 0;
for (dentry = dir->value.directory.dentries_head; dentry;
dentry = dentry->next) {
for (dkv = dentry->kv; dkv; dkv = dkv->associate) {
/* Special Case: Extended Key Specifier_ID */
if (dkv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) {
if (last_extkey_spec == NULL) {
last_extkey_spec = dkv;
} else if (dkv->value.immediate != last_extkey_spec->value.immediate) {
last_extkey_spec = dkv;
} else {
continue;
}
/* Special Case: Extended Key */
} else if (dkv->key.id == CSR1212_KV_ID_EXTENDED_KEY) {
if (last_extkey == NULL) {
last_extkey = dkv;
} else if (dkv->value.immediate != last_extkey->value.immediate) {
last_extkey = dkv;
} else {
continue;
}
}
num_entries += 1;
switch(dkv->key.type) {
default:
case CSR1212_KV_TYPE_IMMEDIATE:
case CSR1212_KV_TYPE_CSR_OFFSET:
break;
case CSR1212_KV_TYPE_LEAF:
case CSR1212_KV_TYPE_DIRECTORY:
/* Remove from list */
if (dkv->prev && (dkv->prev->next == dkv))
dkv->prev->next = dkv->next;
if (dkv->next && (dkv->next->prev == dkv))
dkv->next->prev = dkv->prev;
//if (dkv == *layout_tail)
// *layout_tail = dkv->prev;
/* Special case: Extended ROM leafs */
if (dkv->key.id == CSR1212_KV_ID_EXTENDED_ROM) {
dkv->value.leaf.len = -1;
/* Don't add Extended ROM leafs in the layout list,
* they are handled differently. */
break;
}
/* Add to tail of list */
dkv->next = NULL;
dkv->prev = *layout_tail;
(*layout_tail)->next = dkv;
*layout_tail = dkv;
break;
}
}
}
return num_entries;
}
size_t csr1212_generate_layout_order(struct csr1212_keyval *kv)
{
struct csr1212_keyval *ltail = kv;
size_t agg_size = 0;
while(kv) {
switch(kv->key.type) {
case CSR1212_KV_TYPE_LEAF:
/* Add 1 quadlet for crc/len field */
agg_size += kv->value.leaf.len + 1;
break;
case CSR1212_KV_TYPE_DIRECTORY:
kv->value.directory.len = csr1212_generate_layout_subdir(kv, &ltail);
/* Add 1 quadlet for crc/len field */
agg_size += kv->value.directory.len + 1;
break;
}
kv = kv->next;
}
return quads_to_bytes(agg_size);
}
struct csr1212_keyval *csr1212_generate_positions(struct csr1212_csr_rom_cache *cache,
struct csr1212_keyval *start_kv,
int start_pos)
{
struct csr1212_keyval *kv = start_kv;
struct csr1212_keyval *okv = start_kv;
int pos = start_pos;
int kv_len = 0, okv_len = 0;
cache->layout_head = kv;
while(kv && pos < cache->size) {
/* Special case: Extended ROM leafs */
if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) {
kv->offset = cache->offset + pos;
}
switch(kv->key.type) {
case CSR1212_KV_TYPE_LEAF:
kv_len = kv->value.leaf.len;
break;
case CSR1212_KV_TYPE_DIRECTORY:
kv_len = kv->value.directory.len;
break;
default:
/* Should never get here */
break;
}
pos += quads_to_bytes(kv_len + 1);
if (pos <= cache->size) {
okv = kv;
okv_len = kv_len;
kv = kv->next;
}
}
cache->layout_tail = okv;
cache->len = (okv->offset - cache->offset) + quads_to_bytes(okv_len + 1);
return kv;
}
static void csr1212_generate_tree_subdir(struct csr1212_keyval *dir,
u_int32_t *data_buffer)
{
struct csr1212_dentry *dentry;
struct csr1212_keyval *last_extkey_spec = NULL;
struct csr1212_keyval *last_extkey = NULL;
int index = 0;
for (dentry = dir->value.directory.dentries_head; dentry; dentry = dentry->next) {
struct csr1212_keyval *a;
for (a = dentry->kv; a; a = a->associate) {
u_int32_t value = 0;
/* Special Case: Extended Key Specifier_ID */
if (a->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) {
if (last_extkey_spec == NULL) {
last_extkey_spec = a;
} else if (a->value.immediate != last_extkey_spec->value.immediate) {
last_extkey_spec = a;
} else {
continue;
}
/* Special Case: Extended Key */
} else if (a->key.id == CSR1212_KV_ID_EXTENDED_KEY) {
if (last_extkey == NULL) {
last_extkey = a;
} else if (a->value.immediate != last_extkey->value.immediate) {
last_extkey = a;
} else {
continue;
}
}
switch(a->key.type) {
case CSR1212_KV_TYPE_IMMEDIATE:
value = a->value.immediate;
break;
case CSR1212_KV_TYPE_CSR_OFFSET:
value = a->value.csr_offset;
break;
case CSR1212_KV_TYPE_LEAF:
value = a->offset;
value -= dir->offset + quads_to_bytes(1+index);
value = bytes_to_quads(value);
break;
case CSR1212_KV_TYPE_DIRECTORY:
value = a->offset;
value -= dir->offset + quads_to_bytes(1+index);
value = bytes_to_quads(value);
break;
default:
/* Should never get here */
break; /* GDB breakpoint */
}
value |= (a->key.id & CSR1212_KV_KEY_ID_MASK) << CSR1212_KV_KEY_SHIFT;
value |= (a->key.type & CSR1212_KV_KEY_TYPE_MASK) <<
(CSR1212_KV_KEY_SHIFT + CSR1212_KV_KEY_TYPE_SHIFT);
data_buffer[index] = CSR1212_CPU_TO_BE32(value);
index++;
}
}
}
void csr1212_fill_cache(struct csr1212_csr_rom_cache *cache)
{
struct csr1212_keyval *kv, *nkv;
struct csr1212_keyval_img *kvi;
for (kv = cache->layout_head; kv != cache->layout_tail->next; kv = nkv) {
kvi = (struct csr1212_keyval_img *)
(cache->data + bytes_to_quads(kv->offset - cache->offset));
switch(kv->key.type) {
default:
case CSR1212_KV_TYPE_IMMEDIATE:
case CSR1212_KV_TYPE_CSR_OFFSET:
/* Should never get here */
break; /* GDB breakpoint */
case CSR1212_KV_TYPE_LEAF:
/* Don't copy over Extended ROM areas, they are
* already filled out! */
if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
memcpy(kvi->data, kv->value.leaf.data,
quads_to_bytes(kv->value.leaf.len));
kvi->length = CSR1212_CPU_TO_BE16(kv->value.leaf.len);
kvi->crc = csr1212_crc16(kvi->data, kv->value.leaf.len);
break;
case CSR1212_KV_TYPE_DIRECTORY:
csr1212_generate_tree_subdir(kv, kvi->data);
kvi->length = CSR1212_CPU_TO_BE16(kv->value.directory.len);
kvi->crc = csr1212_crc16(kvi->data, kv->value.directory.len);
break;
}
nkv = kv->next;
if (kv->prev)
kv->prev->next = NULL;
if (kv->next)
kv->next->prev = NULL;
kv->prev = NULL;
kv->next = NULL;
}
}
int csr1212_generate_csr_image(struct csr1212_csr *csr)
{
struct csr1212_bus_info_block_img *bi;
struct csr1212_csr_rom_cache *cache;
struct csr1212_keyval *kv;
size_t agg_size;
int ret;
int init_offset;
if (!csr)
return CSR1212_EINVAL;
cache = csr->cache_head;
bi = (struct csr1212_bus_info_block_img*)cache->data;
bi->length = bytes_to_quads(csr->bus_info_len) - 1;
bi->crc_length = bi->length;
bi->crc = csr1212_crc16(bi->data, bi->crc_length);
csr->root_kv->next = NULL;
csr->root_kv->prev = NULL;
agg_size = csr1212_generate_layout_order(csr->root_kv);
init_offset = csr->bus_info_len;
for (kv = csr->root_kv, cache = csr->cache_head; kv; cache = cache->next) {
if (!cache) {
/* Estimate approximate number of additional cache
* regions needed (it assumes that the cache holding
* the first 1K Config ROM space always exists). */
int est_c = agg_size / (CSR1212_EXTENDED_ROM_SIZE -
(2 * sizeof(u_int32_t))) + 1;
/* Add additional cache regions, extras will be
* removed later */
for (; est_c; est_c--) {
ret = csr1212_append_new_cache(csr, CSR1212_EXTENDED_ROM_SIZE);
if (ret != CSR1212_SUCCESS)
return ret;
}
/* Need to re-layout for additional cache regions */
agg_size = csr1212_generate_layout_order(csr->root_kv);
kv = csr->root_kv;
cache = csr->cache_head;
init_offset = csr->bus_info_len;
}
kv = csr1212_generate_positions(cache, kv, init_offset);
agg_size -= cache->len;
init_offset = sizeof(u_int32_t);
}
/* Remove unused, excess cache regions */
while (cache) {
struct csr1212_csr_rom_cache *oc = cache;
cache = cache->next;
csr1212_remove_cache(csr, oc);
}
/* Go through the list backward so that when done, the correct CRC
* will be calculated for the Extended ROM areas. */
for(cache = csr->cache_tail; cache; cache = cache->prev) {
/* Only Extended ROM caches should have this set. */
if (cache->ext_rom) {
int leaf_size;
/* Make sure the Extended ROM leaf is a multiple of
* max_rom in size. */
if (csr->max_rom < 1)
return CSR1212_EINVAL;
leaf_size = (cache->len + (csr->max_rom - 1)) &
~(csr->max_rom - 1);
/* Zero out the unused ROM region */
memset(cache->data + bytes_to_quads(cache->len), 0x00,
leaf_size - cache->len);
/* Subtract leaf header */
leaf_size -= sizeof(u_int32_t);
/* Update the Extended ROM leaf length */
cache->ext_rom->value.leaf.len =
bytes_to_quads(leaf_size);
} else {
/* Zero out the unused ROM region */
memset(cache->data + bytes_to_quads(cache->len), 0x00,
cache->size - cache->len);
}
/* Copy the data into the cache buffer */
csr1212_fill_cache(cache);
if (cache != csr->cache_head) {
/* Set the length and CRC of the extended ROM. */
struct csr1212_keyval_img *kvi =
(struct csr1212_keyval_img*)cache->data;
kvi->length = CSR1212_CPU_TO_BE16(bytes_to_quads(cache->len) - 1);
kvi->crc = csr1212_crc16(kvi->data,
bytes_to_quads(cache->len) - 1);
}
}
return CSR1212_SUCCESS;
}
int csr1212_read(struct csr1212_csr *csr, u_int32_t offset, void *buffer, u_int32_t len)
{
struct csr1212_csr_rom_cache *cache;
for (cache = csr->cache_head; cache; cache = cache->next) {
if (offset >= cache->offset &&
(offset + len) <= (cache->offset + cache->size)) {
memcpy(buffer,
&cache->data[bytes_to_quads(offset - cache->offset)],
len);
return CSR1212_SUCCESS;
}
}
return CSR1212_ENOENT;
}
/* Parse a chunk of data as a Config ROM */
static int csr1212_parse_bus_info_block(struct csr1212_csr *csr)
{
struct csr1212_bus_info_block_img *bi;
struct csr1212_cache_region *cr;
int i;
int ret;
/* IEEE 1212 says that the entire bus info block should be readable in
* a single transaction regardless of the max_rom value.
* Unfortunately, many IEEE 1394 devices do not abide by that, so the
* bus info block will be read 1 quadlet at a time. The rest of the
* ConfigROM will be read according to the max_rom field. */
for (i = 0; i < csr->bus_info_len; i += sizeof(csr1212_quad_t)) {
ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
sizeof(csr1212_quad_t),
&csr->cache_head->data[bytes_to_quads(i)],
csr->private);
if (ret != CSR1212_SUCCESS)
return ret;
/* check ROM header's info_length */
if (i == 0 &&
CSR1212_BE32_TO_CPU(csr->cache_head->data[0]) >> 24 !=
bytes_to_quads(csr->bus_info_len) - 1)
return CSR1212_EINVAL;
}
bi = (struct csr1212_bus_info_block_img*)csr->cache_head->data;
csr->crc_len = quads_to_bytes(bi->crc_length);
/* IEEE 1212 recommends that crc_len be equal to bus_info_len, but that is not
* always the case, so read the rest of the crc area 1 quadlet at a time. */
for (i = csr->bus_info_len; i <= csr->crc_len; i += sizeof(csr1212_quad_t)) {
ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
sizeof(csr1212_quad_t),
&csr->cache_head->data[bytes_to_quads(i)],
csr->private);
if (ret != CSR1212_SUCCESS)
return ret;
}
#if 0
/* Apparently there are too many differnt wrong implementations of the
* CRC algorithm that verifying them is moot. */
if ((csr1212_crc16(bi->data, bi->crc_length) != bi->crc) &&
(csr1212_msft_crc16(bi->data, bi->crc_length) != bi->crc))
return CSR1212_EINVAL;
#endif
cr = CSR1212_MALLOC(sizeof(*cr));
if (!cr)
return CSR1212_ENOMEM;
cr->next = NULL;
cr->prev = NULL;
cr->offset_start = 0;
cr->offset_end = csr->crc_len + 4;
csr->cache_head->filled_head = cr;
csr->cache_head->filled_tail = cr;
return CSR1212_SUCCESS;
}
static int csr1212_parse_dir_entry(struct csr1212_keyval *dir,
csr1212_quad_t ki,
u_int32_t kv_pos)
{
int ret = CSR1212_SUCCESS;
struct csr1212_keyval *k = NULL;
u_int32_t offset;
switch(CSR1212_KV_KEY_TYPE(ki)) {
case CSR1212_KV_TYPE_IMMEDIATE:
k = csr1212_new_immediate(CSR1212_KV_KEY_ID(ki),
CSR1212_KV_VAL(ki));
if (!k) {
ret = CSR1212_ENOMEM;
goto fail;
}
k->refcnt = 0; /* Don't keep local reference when parsing. */
break;
case CSR1212_KV_TYPE_CSR_OFFSET:
k = csr1212_new_csr_offset(CSR1212_KV_KEY_ID(ki),
CSR1212_KV_VAL(ki));
if (!k) {
ret = CSR1212_ENOMEM;
goto fail;
}
k->refcnt = 0; /* Don't keep local reference when parsing. */
break;
default:
/* Compute the offset from 0xffff f000 0000. */
offset = quads_to_bytes(CSR1212_KV_VAL(ki)) + kv_pos;
if (offset == kv_pos) {
/* Uh-oh. Can't have a relative offset of 0 for Leaves
* or Directories. The Config ROM image is most likely
* messed up, so we'll just abort here. */
ret = CSR1212_EIO;
goto fail;
}
k = csr1212_find_keyval_offset(dir, offset);
if (k)
break; /* Found it. */
if (CSR1212_KV_KEY_TYPE(ki) == CSR1212_KV_TYPE_DIRECTORY) {
k = csr1212_new_directory(CSR1212_KV_KEY_ID(ki));
} else {
k = csr1212_new_leaf(CSR1212_KV_KEY_ID(ki), NULL, 0);
}
if (!k) {
ret = CSR1212_ENOMEM;
goto fail;
}
k->refcnt = 0; /* Don't keep local reference when parsing. */
k->valid = 0; /* Contents not read yet so it's not valid. */
k->offset = offset;
k->prev = dir;
k->next = dir->next;
dir->next->prev = k;
dir->next = k;
}
ret = csr1212_attach_keyval_to_directory(dir, k);
fail:
if (ret != CSR1212_SUCCESS) {
if (k)
free_keyval(k);
}
return ret;
}
int csr1212_parse_keyval(struct csr1212_keyval *kv,
struct csr1212_csr_rom_cache *cache)
{
struct csr1212_keyval_img *kvi;
int i;
int ret = CSR1212_SUCCESS;
int kvi_len;
kvi = (struct csr1212_keyval_img*)&cache->data[bytes_to_quads(kv->offset -
cache->offset)];
kvi_len = CSR1212_BE16_TO_CPU(kvi->length);
#if 0
/* Apparently there are too many differnt wrong implementations of the
* CRC algorithm that verifying them is moot. */
if ((csr1212_crc16(kvi->data, kvi_len) != kvi->crc) &&
(csr1212_msft_crc16(kvi->data, kvi_len) != kvi->crc)) {
ret = CSR1212_EINVAL;
goto fail;
}
#endif
switch(kv->key.type) {
case CSR1212_KV_TYPE_DIRECTORY:
for (i = 0; i < kvi_len; i++) {
csr1212_quad_t ki = kvi->data[i];
/* Some devices put null entries in their unit
* directories. If we come across such an entry,
* then skip it. */
if (ki == 0x0)
continue;
ret = csr1212_parse_dir_entry(kv, ki,
(kv->offset +
quads_to_bytes(i + 1)));
}
kv->value.directory.len = kvi_len;
break;
case CSR1212_KV_TYPE_LEAF:
if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) {
kv->value.leaf.data = CSR1212_MALLOC(quads_to_bytes(kvi_len));
if (!kv->value.leaf.data) {
ret = CSR1212_ENOMEM;
goto fail;
}
kv->value.leaf.len = kvi_len;
memcpy(kv->value.leaf.data, kvi->data, quads_to_bytes(kvi_len));
}
break;
}
kv->valid = 1;
fail:
return ret;
}
int _csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
{
struct csr1212_cache_region *cr, *ncr, *newcr = NULL;
struct csr1212_keyval_img *kvi = NULL;
struct csr1212_csr_rom_cache *cache;
int cache_index;
u_int64_t addr;
u_int32_t *cache_ptr;
u_int16_t kv_len = 0;
if (!csr || !kv || csr->max_rom < 1)
return CSR1212_EINVAL;
/* First find which cache the data should be in (or go in if not read
* yet). */
for (cache = csr->cache_head; cache; cache = cache->next) {
if (kv->offset >= cache->offset &&
kv->offset < (cache->offset + cache->size))
break;
}
if (!cache) {
csr1212_quad_t q;
u_int32_t cache_size;
/* Only create a new cache for Extended ROM leaves. */
if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
return CSR1212_EINVAL;
if (csr->ops->bus_read(csr,
CSR1212_REGISTER_SPACE_BASE + kv->offset,
sizeof(csr1212_quad_t), &q, csr->private)) {
return CSR1212_EIO;
}
kv->value.leaf.len = CSR1212_BE32_TO_CPU(q) >> 16;
cache_size = (quads_to_bytes(kv->value.leaf.len + 1) +
(csr->max_rom - 1)) & ~(csr->max_rom - 1);
cache = csr1212_rom_cache_malloc(kv->offset, cache_size);
if (!cache)
return CSR1212_ENOMEM;
kv->value.leaf.data = &cache->data[1];
csr->cache_tail->next = cache;
cache->prev = csr->cache_tail;
cache->next = NULL;
csr->cache_tail = cache;
cache->filled_head =
CSR1212_MALLOC(sizeof(*cache->filled_head));
if (!cache->filled_head) {
return CSR1212_ENOMEM;
}
cache->filled_head->offset_start = 0;
cache->filled_head->offset_end = sizeof(csr1212_quad_t);
cache->filled_tail = cache->filled_head;
cache->filled_head->next = NULL;
cache->filled_head->prev = NULL;
cache->data[0] = q;
/* Don't read the entire extended ROM now. Pieces of it will
* be read when entries inside it are read. */
return csr1212_parse_keyval(kv, cache);
}
cache_index = kv->offset - cache->offset;
/* Now seach read portions of the cache to see if it is there. */
for (cr = cache->filled_head; cr; cr = cr->next) {
if (cache_index < cr->offset_start) {
newcr = CSR1212_MALLOC(sizeof(*newcr));
if (!newcr)
return CSR1212_ENOMEM;
newcr->offset_start = cache_index & ~(csr->max_rom - 1);
newcr->offset_end = newcr->offset_start;
newcr->next = cr;
newcr->prev = cr->prev;
cr->prev = newcr;
cr = newcr;
break;
} else if ((cache_index >= cr->offset_start) &&
(cache_index < cr->offset_end)) {
kvi = (struct csr1212_keyval_img*)
(&cache->data[bytes_to_quads(cache_index)]);
kv_len = quads_to_bytes(CSR1212_BE16_TO_CPU(kvi->length) +
1);
break;
} else if (cache_index == cr->offset_end)
break;
}
if (!cr) {
cr = cache->filled_tail;
newcr = CSR1212_MALLOC(sizeof(*newcr));
if (!newcr)
return CSR1212_ENOMEM;
newcr->offset_start = cache_index & ~(csr->max_rom - 1);
newcr->offset_end = newcr->offset_start;
newcr->prev = cr;
newcr->next = cr->next;
cr->next = newcr;
cr = newcr;
cache->filled_tail = newcr;
}
while(!kvi || cr->offset_end < cache_index + kv_len) {
cache_ptr = &cache->data[bytes_to_quads(cr->offset_end &
~(csr->max_rom - 1))];
addr = (CSR1212_CSR_ARCH_REG_SPACE_BASE + cache->offset +
cr->offset_end) & ~(csr->max_rom - 1);
if (csr->ops->bus_read(csr, addr, csr->max_rom, cache_ptr,
csr->private)) {
if (csr->max_rom == 4)
/* We've got problems! */
return CSR1212_EIO;
/* Apperently the max_rom value was a lie, set it to
* do quadlet reads and try again. */
csr->max_rom = 4;
continue;
}
cr->offset_end += csr->max_rom - (cr->offset_end &
(csr->max_rom - 1));
if (!kvi && (cr->offset_end > cache_index)) {
kvi = (struct csr1212_keyval_img*)
(&cache->data[bytes_to_quads(cache_index)]);
kv_len = quads_to_bytes(CSR1212_BE16_TO_CPU(kvi->length) +
1);
}
if ((kv_len + (kv->offset - cache->offset)) > cache->size) {
/* The Leaf or Directory claims its length extends
* beyond the ConfigROM image region and thus beyond the
* end of our cache region. Therefore, we abort now
* rather than seg faulting later. */
return CSR1212_EIO;
}
ncr = cr->next;
if (ncr && (cr->offset_end >= ncr->offset_start)) {
/* consolidate region entries */
ncr->offset_start = cr->offset_start;
if (cr->prev)
cr->prev->next = cr->next;
ncr->prev = cr->prev;
if (cache->filled_head == cr)
cache->filled_head = ncr;
CSR1212_FREE(cr);
cr = ncr;
}
}
return csr1212_parse_keyval(kv, cache);
}
int csr1212_parse_csr(struct csr1212_csr *csr)
{
static const int mr_map[] = { 4, 64, 1024, 0 };
struct csr1212_dentry *dentry;
int ret;
if (!csr || !csr->ops || !csr->ops->bus_read)
return CSR1212_EINVAL;
ret = csr1212_parse_bus_info_block(csr);
if (ret != CSR1212_SUCCESS)
return ret;
if (!csr->ops->get_max_rom)
csr->max_rom = mr_map[0]; /* default value */
else {
int i = csr->ops->get_max_rom(csr->bus_info_data,
csr->private);
if (i & ~0x3)
return CSR1212_EINVAL;
csr->max_rom = mr_map[i];
}
csr->cache_head->layout_head = csr->root_kv;
csr->cache_head->layout_tail = csr->root_kv;
csr->root_kv->offset = (CSR1212_CONFIG_ROM_SPACE_BASE & 0xffff) +
csr->bus_info_len;
csr->root_kv->valid = 0;
csr->root_kv->next = csr->root_kv;
csr->root_kv->prev = csr->root_kv;
ret = _csr1212_read_keyval(csr, csr->root_kv);
if (ret != CSR1212_SUCCESS)
return ret;
/* Scan through the Root directory finding all extended ROM regions
* and make cache regions for them */
for (dentry = csr->root_kv->value.directory.dentries_head;
dentry; dentry = dentry->next) {
if (dentry->kv->key.id == CSR1212_KV_ID_EXTENDED_ROM &&
!dentry->kv->valid) {
ret = _csr1212_read_keyval(csr, dentry->kv);
if (ret != CSR1212_SUCCESS)
return ret;
}
}
return CSR1212_SUCCESS;
}
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