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![Vegard Nossum](/assets/img/avatar_default.png)
kmemcheck reports a use of uninitialized memory here, but it's not a real error. The structure in question has just been allocated, and the whole field is initialized, but it happens in two steps. We fix the false positive by inserting a kmemcheck annotation. Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
1467 lines
38 KiB
C
1467 lines
38 KiB
C
/*
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* csr1212.c -- IEEE 1212 Control and Status Register support for Linux
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*
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* Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za>
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* Steve Kinneberg <kinnebergsteve@acmsystems.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* TODO List:
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* - Verify interface consistency: i.e., public functions that take a size
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* parameter expect size to be in bytes.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kmemcheck.h>
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#include <linux/string.h>
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#include <asm/bug.h>
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#include <asm/byteorder.h>
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#include "csr1212.h"
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/* Permitted key type for each key id */
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#define __I (1 << CSR1212_KV_TYPE_IMMEDIATE)
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#define __C (1 << CSR1212_KV_TYPE_CSR_OFFSET)
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#define __D (1 << CSR1212_KV_TYPE_DIRECTORY)
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#define __L (1 << CSR1212_KV_TYPE_LEAF)
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static const u8 csr1212_key_id_type_map[0x30] = {
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__C, /* used by Apple iSight */
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__D | __L, /* Descriptor */
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__I | __D | __L, /* Bus_Dependent_Info */
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__I | __D | __L, /* Vendor */
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__I, /* Hardware_Version */
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0, 0, /* Reserved */
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__D | __L | __I, /* Module */
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__I, 0, 0, 0, /* used by Apple iSight, Reserved */
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__I, /* Node_Capabilities */
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__L, /* EUI_64 */
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0, 0, 0, /* Reserved */
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__D, /* Unit */
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__I, /* Specifier_ID */
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__I, /* Version */
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__I | __C | __D | __L, /* Dependent_Info */
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__L, /* Unit_Location */
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0, /* Reserved */
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__I, /* Model */
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__D, /* Instance */
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__L, /* Keyword */
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__D, /* Feature */
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__L, /* Extended_ROM */
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__I, /* Extended_Key_Specifier_ID */
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__I, /* Extended_Key */
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__I | __C | __D | __L, /* Extended_Data */
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__L, /* Modifiable_Descriptor */
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__I, /* Directory_ID */
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__I, /* Revision */
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};
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#undef __I
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#undef __C
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#undef __D
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#undef __L
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#define quads_to_bytes(_q) ((_q) * sizeof(u32))
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#define bytes_to_quads(_b) DIV_ROUND_UP(_b, sizeof(u32))
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static void free_keyval(struct csr1212_keyval *kv)
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{
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if ((kv->key.type == CSR1212_KV_TYPE_LEAF) &&
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(kv->key.id != CSR1212_KV_ID_EXTENDED_ROM))
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CSR1212_FREE(kv->value.leaf.data);
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CSR1212_FREE(kv);
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}
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static u16 csr1212_crc16(const u32 *buffer, size_t length)
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{
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int shift;
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u32 data;
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u16 sum, crc = 0;
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for (; length; length--) {
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data = be32_to_cpu(*buffer);
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buffer++;
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for (shift = 28; shift >= 0; shift -= 4 ) {
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sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
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crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
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}
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crc &= 0xffff;
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}
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return cpu_to_be16(crc);
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}
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/* Microsoft computes the CRC with the bytes in reverse order. */
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static u16 csr1212_msft_crc16(const u32 *buffer, size_t length)
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{
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int shift;
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u32 data;
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u16 sum, crc = 0;
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for (; length; length--) {
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data = le32_to_cpu(*buffer);
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buffer++;
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for (shift = 28; shift >= 0; shift -= 4 ) {
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sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
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crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
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}
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crc &= 0xffff;
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}
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return cpu_to_be16(crc);
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}
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static struct csr1212_dentry *
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csr1212_find_keyval(struct csr1212_keyval *dir, struct csr1212_keyval *kv)
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{
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struct csr1212_dentry *pos;
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for (pos = dir->value.directory.dentries_head;
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pos != NULL; pos = pos->next)
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if (pos->kv == kv)
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return pos;
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return NULL;
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}
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static struct csr1212_keyval *
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csr1212_find_keyval_offset(struct csr1212_keyval *kv_list, u32 offset)
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{
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struct csr1212_keyval *kv;
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for (kv = kv_list->next; kv && (kv != kv_list); kv = kv->next)
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if (kv->offset == offset)
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return kv;
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return NULL;
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}
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/* Creation Routines */
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struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops,
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size_t bus_info_size, void *private)
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{
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struct csr1212_csr *csr;
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csr = CSR1212_MALLOC(sizeof(*csr));
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if (!csr)
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return NULL;
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csr->cache_head =
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csr1212_rom_cache_malloc(CSR1212_CONFIG_ROM_SPACE_OFFSET,
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CSR1212_CONFIG_ROM_SPACE_SIZE);
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if (!csr->cache_head) {
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CSR1212_FREE(csr);
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return NULL;
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}
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/* The keyval key id is not used for the root node, but a valid key id
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* that can be used for a directory needs to be passed to
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* csr1212_new_directory(). */
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csr->root_kv = csr1212_new_directory(CSR1212_KV_ID_VENDOR);
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if (!csr->root_kv) {
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CSR1212_FREE(csr->cache_head);
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CSR1212_FREE(csr);
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return NULL;
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}
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csr->bus_info_data = csr->cache_head->data;
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csr->bus_info_len = bus_info_size;
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csr->crc_len = bus_info_size;
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csr->ops = ops;
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csr->private = private;
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csr->cache_tail = csr->cache_head;
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return csr;
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}
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void csr1212_init_local_csr(struct csr1212_csr *csr,
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const u32 *bus_info_data, int max_rom)
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{
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static const int mr_map[] = { 4, 64, 1024, 0 };
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BUG_ON(max_rom & ~0x3);
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csr->max_rom = mr_map[max_rom];
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memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len);
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}
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static struct csr1212_keyval *csr1212_new_keyval(u8 type, u8 key)
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{
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struct csr1212_keyval *kv;
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if (key < 0x30 && ((csr1212_key_id_type_map[key] & (1 << type)) == 0))
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return NULL;
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kv = CSR1212_MALLOC(sizeof(*kv));
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if (!kv)
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return NULL;
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atomic_set(&kv->refcnt, 1);
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kv->key.type = type;
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kv->key.id = key;
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kv->associate = NULL;
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kv->next = NULL;
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kv->prev = NULL;
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kv->offset = 0;
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kv->valid = 0;
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return kv;
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}
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struct csr1212_keyval *csr1212_new_immediate(u8 key, u32 value)
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{
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struct csr1212_keyval *kv;
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kv = csr1212_new_keyval(CSR1212_KV_TYPE_IMMEDIATE, key);
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if (!kv)
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return NULL;
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kv->value.immediate = value;
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kv->valid = 1;
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return kv;
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}
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static struct csr1212_keyval *
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csr1212_new_leaf(u8 key, const void *data, size_t data_len)
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{
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struct csr1212_keyval *kv;
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kv = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, key);
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if (!kv)
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return NULL;
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if (data_len > 0) {
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kv->value.leaf.data = CSR1212_MALLOC(data_len);
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if (!kv->value.leaf.data) {
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CSR1212_FREE(kv);
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return NULL;
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}
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if (data)
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memcpy(kv->value.leaf.data, data, data_len);
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} else {
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kv->value.leaf.data = NULL;
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}
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kv->value.leaf.len = bytes_to_quads(data_len);
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kv->offset = 0;
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kv->valid = 1;
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return kv;
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}
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static struct csr1212_keyval *
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csr1212_new_csr_offset(u8 key, u32 csr_offset)
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{
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struct csr1212_keyval *kv;
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kv = csr1212_new_keyval(CSR1212_KV_TYPE_CSR_OFFSET, key);
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if (!kv)
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return NULL;
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kv->value.csr_offset = csr_offset;
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kv->offset = 0;
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kv->valid = 1;
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return kv;
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}
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struct csr1212_keyval *csr1212_new_directory(u8 key)
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{
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struct csr1212_keyval *kv;
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kv = csr1212_new_keyval(CSR1212_KV_TYPE_DIRECTORY, key);
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if (!kv)
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return NULL;
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kv->value.directory.len = 0;
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kv->offset = 0;
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kv->value.directory.dentries_head = NULL;
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kv->value.directory.dentries_tail = NULL;
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kv->valid = 1;
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return kv;
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}
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void csr1212_associate_keyval(struct csr1212_keyval *kv,
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struct csr1212_keyval *associate)
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{
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BUG_ON(!kv || !associate || kv->key.id == CSR1212_KV_ID_DESCRIPTOR ||
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(associate->key.id != CSR1212_KV_ID_DESCRIPTOR &&
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associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO &&
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associate->key.id != CSR1212_KV_ID_EXTENDED_KEY &&
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associate->key.id != CSR1212_KV_ID_EXTENDED_DATA &&
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associate->key.id < 0x30) ||
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(kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID &&
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associate->key.id != CSR1212_KV_ID_EXTENDED_KEY) ||
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(kv->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
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associate->key.id != CSR1212_KV_ID_EXTENDED_DATA) ||
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(associate->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
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kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) ||
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(associate->key.id == CSR1212_KV_ID_EXTENDED_DATA &&
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kv->key.id != CSR1212_KV_ID_EXTENDED_KEY));
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if (kv->associate)
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csr1212_release_keyval(kv->associate);
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csr1212_keep_keyval(associate);
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kv->associate = associate;
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}
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static int __csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
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struct csr1212_keyval *kv,
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bool keep_keyval)
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{
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struct csr1212_dentry *dentry;
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BUG_ON(!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY);
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dentry = CSR1212_MALLOC(sizeof(*dentry));
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if (!dentry)
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return -ENOMEM;
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if (keep_keyval)
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csr1212_keep_keyval(kv);
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dentry->kv = kv;
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dentry->next = NULL;
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dentry->prev = dir->value.directory.dentries_tail;
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if (!dir->value.directory.dentries_head)
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dir->value.directory.dentries_head = dentry;
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if (dir->value.directory.dentries_tail)
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dir->value.directory.dentries_tail->next = dentry;
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dir->value.directory.dentries_tail = dentry;
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return CSR1212_SUCCESS;
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}
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int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
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struct csr1212_keyval *kv)
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{
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return __csr1212_attach_keyval_to_directory(dir, kv, true);
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}
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#define CSR1212_DESCRIPTOR_LEAF_DATA(kv) \
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(&((kv)->value.leaf.data[1]))
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#define CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, type) \
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((kv)->value.leaf.data[0] = \
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cpu_to_be32(CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) | \
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((type) << CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT)))
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#define CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, spec_id) \
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((kv)->value.leaf.data[0] = \
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cpu_to_be32((CSR1212_DESCRIPTOR_LEAF_TYPE(kv) << \
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CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT) | \
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((spec_id) & CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK)))
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static struct csr1212_keyval *
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csr1212_new_descriptor_leaf(u8 dtype, u32 specifier_id,
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const void *data, size_t data_len)
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{
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struct csr1212_keyval *kv;
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kv = csr1212_new_leaf(CSR1212_KV_ID_DESCRIPTOR, NULL,
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data_len + CSR1212_DESCRIPTOR_LEAF_OVERHEAD);
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if (!kv)
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return NULL;
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kmemcheck_annotate_variable(kv->value.leaf.data[0]);
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CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, dtype);
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CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, specifier_id);
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if (data)
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memcpy(CSR1212_DESCRIPTOR_LEAF_DATA(kv), data, data_len);
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return kv;
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}
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/* Check if string conforms to minimal ASCII as per IEEE 1212 clause 7.4 */
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static int csr1212_check_minimal_ascii(const char *s)
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{
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static const char minimal_ascii_table[] = {
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/* 1 2 4 8 16 32 64 128 */
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128, /* --, --, --, --, --, --, --, 07, */
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4 + 16 + 32, /* --, --, 0a, --, 0C, 0D, --, --, */
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0, /* --, --, --, --, --, --, --, --, */
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0, /* --, --, --, --, --, --, --, --, */
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255 - 8 - 16, /* 20, 21, 22, --, --, 25, 26, 27, */
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255, /* 28, 29, 2a, 2b, 2c, 2d, 2e, 2f, */
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255, /* 30, 31, 32, 33, 34, 35, 36, 37, */
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255, /* 38, 39, 3a, 3b, 3c, 3d, 3e, 3f, */
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255, /* 40, 41, 42, 43, 44, 45, 46, 47, */
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255, /* 48, 49, 4a, 4b, 4c, 4d, 4e, 4f, */
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255, /* 50, 51, 52, 53, 54, 55, 56, 57, */
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1 + 2 + 4 + 128, /* 58, 59, 5a, --, --, --, --, 5f, */
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255 - 1, /* --, 61, 62, 63, 64, 65, 66, 67, */
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255, /* 68, 69, 6a, 6b, 6c, 6d, 6e, 6f, */
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255, /* 70, 71, 72, 73, 74, 75, 76, 77, */
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1 + 2 + 4, /* 78, 79, 7a, --, --, --, --, --, */
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};
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int i, j;
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for (; *s; s++) {
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i = *s >> 3; /* i = *s / 8; */
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j = 1 << (*s & 3); /* j = 1 << (*s % 8); */
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if (i >= ARRAY_SIZE(minimal_ascii_table) ||
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!(minimal_ascii_table[i] & j))
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return -EINVAL;
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}
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return 0;
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}
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|
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/* IEEE 1212 clause 7.5.4.1 textual descriptors (English, minimal ASCII) */
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struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s)
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{
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struct csr1212_keyval *kv;
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u32 *text;
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size_t str_len, quads;
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if (!s || !*s || csr1212_check_minimal_ascii(s))
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return NULL;
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str_len = strlen(s);
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quads = bytes_to_quads(str_len);
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kv = csr1212_new_descriptor_leaf(0, 0, NULL, quads_to_bytes(quads) +
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CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD);
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if (!kv)
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return NULL;
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kv->value.leaf.data[1] = 0; /* width, character_set, language */
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text = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv);
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text[quads - 1] = 0; /* padding */
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memcpy(text, s, str_len);
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|
|
|
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);
|
|
}
|
|
|
|
/* 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 noone holds a reference on them. By means of
|
|
* list manipulation, this routine will descend a directory structure in a
|
|
* non-recursive manner. */
|
|
void csr1212_release_keyval(struct csr1212_keyval *kv)
|
|
{
|
|
struct csr1212_keyval *k, *a;
|
|
struct csr1212_dentry dentry;
|
|
struct csr1212_dentry *head, *tail;
|
|
|
|
if (!atomic_dec_and_test(&kv->refcnt))
|
|
return;
|
|
|
|
dentry.kv = kv;
|
|
dentry.next = NULL;
|
|
dentry.prev = NULL;
|
|
|
|
head = &dentry;
|
|
tail = head;
|
|
|
|
while (head) {
|
|
k = head->kv;
|
|
|
|
while (k) {
|
|
/* must not dec_and_test kv->refcnt again */
|
|
if (k != kv && !atomic_dec_and_test(&k->refcnt))
|
|
break;
|
|
|
|
a = k->associate;
|
|
|
|
if (k->key.type == CSR1212_KV_TYPE_DIRECTORY) {
|
|
/* If the current entry is a directory, 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;
|
|
u64 csr_addr;
|
|
|
|
BUG_ON(!csr || !csr->ops || !csr->ops->allocate_addr_range ||
|
|
!csr->ops->release_addr || csr->max_rom < 1);
|
|
|
|
/* 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 -ENOMEM;
|
|
|
|
if (csr_addr < CSR1212_REGISTER_SPACE_BASE) {
|
|
/* Invalid address returned from allocate_addr_range(). */
|
|
csr->ops->release_addr(csr_addr, csr->private);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cache = csr1212_rom_cache_malloc(csr_addr - CSR1212_REGISTER_SPACE_BASE,
|
|
romsize);
|
|
if (!cache) {
|
|
csr->ops->release_addr(csr_addr, csr->private);
|
|
return -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 -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 -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 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;
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
static 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 */
|
|
WARN_ON(1);
|
|
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;
|
|
}
|
|
|
|
#define CSR1212_KV_KEY_SHIFT 24
|
|
#define CSR1212_KV_KEY_TYPE_SHIFT 6
|
|
#define CSR1212_KV_KEY_ID_MASK 0x3f
|
|
#define CSR1212_KV_KEY_TYPE_MASK 0x3 /* after shift */
|
|
|
|
static void
|
|
csr1212_generate_tree_subdir(struct csr1212_keyval *dir, u32 *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) {
|
|
u32 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 */
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
|
|
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] = cpu_to_be32(value);
|
|
index++;
|
|
}
|
|
}
|
|
}
|
|
|
|
struct csr1212_keyval_img {
|
|
u16 length;
|
|
u16 crc;
|
|
|
|
/* Must be last */
|
|
u32 data[0]; /* older gcc can't handle [] which is standard */
|
|
};
|
|
|
|
static 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 */
|
|
WARN_ON(1);
|
|
break;
|
|
|
|
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 = 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 = 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;
|
|
}
|
|
}
|
|
|
|
/* This size is arbitrarily chosen.
|
|
* The struct overhead is subtracted for more economic allocations. */
|
|
#define CSR1212_EXTENDED_ROM_SIZE (2048 - sizeof(struct csr1212_csr_rom_cache))
|
|
|
|
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;
|
|
|
|
BUG_ON(!csr);
|
|
|
|
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(u32))) + 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(u32);
|
|
}
|
|
|
|
/* 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. */
|
|
BUG_ON(csr->max_rom < 1);
|
|
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(u32);
|
|
|
|
/* 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;
|
|
u16 len = bytes_to_quads(cache->len) - 1;
|
|
|
|
kvi->length = cpu_to_be16(len);
|
|
kvi->crc = csr1212_crc16(kvi->data, len);
|
|
}
|
|
}
|
|
|
|
return CSR1212_SUCCESS;
|
|
}
|
|
|
|
int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 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 -ENOENT;
|
|
}
|
|
|
|
/*
|
|
* Apparently there are many different wrong implementations of the CRC
|
|
* algorithm. We don't fail, we just warn... approximately once per GUID.
|
|
*/
|
|
static void
|
|
csr1212_check_crc(const u32 *buffer, size_t length, u16 crc, __be32 *guid)
|
|
{
|
|
static u64 last_bad_eui64;
|
|
u64 eui64 = ((u64)be32_to_cpu(guid[0]) << 32) | be32_to_cpu(guid[1]);
|
|
|
|
if (csr1212_crc16(buffer, length) == crc ||
|
|
csr1212_msft_crc16(buffer, length) == crc ||
|
|
eui64 == last_bad_eui64)
|
|
return;
|
|
|
|
printk(KERN_DEBUG "ieee1394: config ROM CRC error\n");
|
|
last_bad_eui64 = eui64;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
for (i = 0; i < csr->bus_info_len; i += sizeof(u32)) {
|
|
ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
|
|
&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 &&
|
|
be32_to_cpu(csr->cache_head->data[0]) >> 24 !=
|
|
bytes_to_quads(csr->bus_info_len) - 1)
|
|
return -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(u32)) {
|
|
ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
|
|
&csr->cache_head->data[bytes_to_quads(i)],
|
|
csr->private);
|
|
if (ret != CSR1212_SUCCESS)
|
|
return ret;
|
|
}
|
|
|
|
csr1212_check_crc(bi->data, bi->crc_length, bi->crc,
|
|
&csr->bus_info_data[3]);
|
|
|
|
cr = CSR1212_MALLOC(sizeof(*cr));
|
|
if (!cr)
|
|
return -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;
|
|
}
|
|
|
|
#define CSR1212_KV_KEY(q) (be32_to_cpu(q) >> CSR1212_KV_KEY_SHIFT)
|
|
#define CSR1212_KV_KEY_TYPE(q) (CSR1212_KV_KEY(q) >> CSR1212_KV_KEY_TYPE_SHIFT)
|
|
#define CSR1212_KV_KEY_ID(q) (CSR1212_KV_KEY(q) & CSR1212_KV_KEY_ID_MASK)
|
|
#define CSR1212_KV_VAL_MASK 0xffffff
|
|
#define CSR1212_KV_VAL(q) (be32_to_cpu(q) & CSR1212_KV_VAL_MASK)
|
|
|
|
static int
|
|
csr1212_parse_dir_entry(struct csr1212_keyval *dir, u32 ki, u32 kv_pos)
|
|
{
|
|
int ret = CSR1212_SUCCESS;
|
|
struct csr1212_keyval *k = NULL;
|
|
u32 offset;
|
|
bool keep_keyval = true;
|
|
|
|
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 = -ENOMEM;
|
|
goto out;
|
|
}
|
|
/* Don't keep local reference when parsing. */
|
|
keep_keyval = false;
|
|
break;
|
|
|
|
case CSR1212_KV_TYPE_CSR_OFFSET:
|
|
k = csr1212_new_csr_offset(CSR1212_KV_KEY_ID(ki),
|
|
CSR1212_KV_VAL(ki));
|
|
if (!k) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
/* Don't keep local reference when parsing. */
|
|
keep_keyval = false;
|
|
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 = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
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 = -ENOMEM;
|
|
goto out;
|
|
}
|
|
/* Don't keep local reference when parsing. */
|
|
keep_keyval = false;
|
|
/* Contents not read yet so it's not valid. */
|
|
k->valid = 0;
|
|
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, keep_keyval);
|
|
out:
|
|
if (ret != CSR1212_SUCCESS && k != NULL)
|
|
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 = be16_to_cpu(kvi->length);
|
|
|
|
/* GUID is wrong in here in case of extended ROM. We don't care. */
|
|
csr1212_check_crc(kvi->data, kvi_len, kvi->crc, &cache->data[3]);
|
|
|
|
switch (kv->key.type) {
|
|
case CSR1212_KV_TYPE_DIRECTORY:
|
|
for (i = 0; i < kvi_len; i++) {
|
|
u32 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) {
|
|
size_t size = quads_to_bytes(kvi_len);
|
|
|
|
kv->value.leaf.data = CSR1212_MALLOC(size);
|
|
if (!kv->value.leaf.data) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
kv->value.leaf.len = kvi_len;
|
|
memcpy(kv->value.leaf.data, kvi->data, size);
|
|
}
|
|
break;
|
|
}
|
|
|
|
kv->valid = 1;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static 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;
|
|
u64 addr;
|
|
u32 *cache_ptr;
|
|
u16 kv_len = 0;
|
|
|
|
BUG_ON(!csr || !kv || csr->max_rom < 1);
|
|
|
|
/* 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) {
|
|
u32 q, cache_size;
|
|
|
|
/* Only create a new cache for Extended ROM leaves. */
|
|
if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
|
|
return -EINVAL;
|
|
|
|
if (csr->ops->bus_read(csr,
|
|
CSR1212_REGISTER_SPACE_BASE + kv->offset,
|
|
&q, csr->private))
|
|
return -EIO;
|
|
|
|
kv->value.leaf.len = 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 -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 -ENOMEM;
|
|
|
|
cache->filled_head->offset_start = 0;
|
|
cache->filled_head->offset_end = sizeof(u32);
|
|
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 -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(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 -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, cache_ptr, csr->private))
|
|
return -EIO;
|
|
|
|
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(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 -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);
|
|
}
|
|
|
|
struct csr1212_keyval *
|
|
csr1212_get_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
|
|
{
|
|
if (!kv)
|
|
return NULL;
|
|
if (!kv->valid)
|
|
if (csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS)
|
|
return NULL;
|
|
return kv;
|
|
}
|
|
|
|
int csr1212_parse_csr(struct csr1212_csr *csr)
|
|
{
|
|
struct csr1212_dentry *dentry;
|
|
int ret;
|
|
|
|
BUG_ON(!csr || !csr->ops || !csr->ops->bus_read);
|
|
|
|
ret = csr1212_parse_bus_info_block(csr);
|
|
if (ret != CSR1212_SUCCESS)
|
|
return ret;
|
|
|
|
/*
|
|
* There has been a buggy firmware with bus_info_block.max_rom > 0
|
|
* spotted which actually only supported quadlet read requests to the
|
|
* config ROM. Therefore read everything quadlet by quadlet regardless
|
|
* of what the bus info block says.
|
|
*/
|
|
csr->max_rom = 4;
|
|
|
|
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;
|
|
}
|