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csr1212.c
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csr1212.c
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/*
* csr1212.c -- IEEE 1212 Control and Status Register support for Linux
*
* Copyright (C) 2003 Francois Retief <[email protected]>
* Steve Kinneberg <[email protected]>
*
* 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] = {
0, /* Reserved */
__D | __L, /* Descriptor */
__I | __D | __L, /* Bus_Dependent_Info */
__I | __D | __L, /* Vendor */
__I, /* Hardware_Version */
0, 0, /* Reserved */
__D | __L, /* Module */
0, 0, 0, 0, /* 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, <ail);
/* 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 {