diff options
Diffstat (limited to 'drivers/ieee1394/csr1212.c')
| -rw-r--r-- | drivers/ieee1394/csr1212.c | 1612 |
1 files changed, 1612 insertions, 0 deletions
diff --git a/drivers/ieee1394/csr1212.c b/drivers/ieee1394/csr1212.c new file mode 100644 index 000000000000..7c4330e2e875 --- /dev/null +++ b/drivers/ieee1394/csr1212.c @@ -0,0 +1,1612 @@ +/* + * 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] = { + 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 }; + + csr->max_rom = mr_map[max_rom]; + 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 = pd[palette_depth] * cs[color_space]; + int pixel_size = (hscan * vscan + 3) & ~0x3; + + if ((palette_depth && !palette) || !pixels) + return NULL; + + 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->allocate_addr_range || + !csr->ops->release_addr) + return CSR1212_ENOMEM; + + /* 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 == ~0ULL) { + 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 { + 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. */ + 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; + } + + 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 (bytes_to_quads(csr->bus_info_len - sizeof(csr1212_quad_t)) != bi->length) + return CSR1212_EINVAL; + +#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(struct csr1212_cache_region)); + 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) + 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(struct csr1212_cache_region)); + 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(struct csr1212_cache_region)); + 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(struct csr1212_cache_region)); + 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->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 + csr->max_rom = mr_map[csr->ops->get_max_rom(csr->bus_info_data, + csr->private)]; + + 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; + csr1212_get_keyval(csr, csr->root_kv); + + /* 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) { + csr1212_get_keyval(csr, dentry->kv); + + if (ret != CSR1212_SUCCESS) + return ret; + } + } + + return CSR1212_SUCCESS; +} |