drivers/ieee1394/csr1212.h

   1 /*
   2  * csr1212.h -- IEEE 1212 Control and Status Register support for Linux
   3  *
   4  * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za>
   5  *                    Steve Kinneberg <kinnebergsteve@acmsystems.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  *
  10  *    1. Redistributions of source code must retain the above copyright notice,
  11  *       this list of conditions and the following disclaimer.
  12  *    2. Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in the
  14  *       documentation and/or other materials provided with the distribution.
  15  *    3. The name of the author may not be used to endorse or promote products
  16  *       derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  19  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  21  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  27  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef __CSR1212_H__
  31 #define __CSR1212_H__
  32
  33 #include <linux/types.h>
  34 #include <linux/vmalloc.h>
  35
  36 #define CSR1212_MALLOC(size)            vmalloc((size))
  37 #define CSR1212_FREE(ptr)               vfree(ptr)
  38
  39 #define CSR1212_SUCCESS (0)
  40
  41
  42 /* CSR 1212 key types */
  43 #define CSR1212_KV_TYPE_IMMEDIATE               0
  44 #define CSR1212_KV_TYPE_CSR_OFFSET              1
  45 #define CSR1212_KV_TYPE_LEAF                    2
  46 #define CSR1212_KV_TYPE_DIRECTORY               3
  47
  48
  49 /* CSR 1212 key ids */
  50 #define CSR1212_KV_ID_DESCRIPTOR                0x01
  51 #define CSR1212_KV_ID_BUS_DEPENDENT_INFO        0x02
  52 #define CSR1212_KV_ID_VENDOR                    0x03
  53 #define CSR1212_KV_ID_HARDWARE_VERSION          0x04
  54 #define CSR1212_KV_ID_MODULE                    0x07
  55 #define CSR1212_KV_ID_NODE_CAPABILITIES         0x0C
  56 #define CSR1212_KV_ID_EUI_64                    0x0D
  57 #define CSR1212_KV_ID_UNIT                      0x11
  58 #define CSR1212_KV_ID_SPECIFIER_ID              0x12
  59 #define CSR1212_KV_ID_VERSION                   0x13
  60 #define CSR1212_KV_ID_DEPENDENT_INFO            0x14
  61 #define CSR1212_KV_ID_UNIT_LOCATION             0x15
  62 #define CSR1212_KV_ID_MODEL                     0x17
  63 #define CSR1212_KV_ID_INSTANCE                  0x18
  64 #define CSR1212_KV_ID_KEYWORD                   0x19
  65 #define CSR1212_KV_ID_FEATURE                   0x1A
  66 #define CSR1212_KV_ID_EXTENDED_ROM              0x1B
  67 #define CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID 0x1C
  68 #define CSR1212_KV_ID_EXTENDED_KEY              0x1D
  69 #define CSR1212_KV_ID_EXTENDED_DATA             0x1E
  70 #define CSR1212_KV_ID_MODIFIABLE_DESCRIPTOR     0x1F
  71 #define CSR1212_KV_ID_DIRECTORY_ID              0x20
  72 #define CSR1212_KV_ID_REVISION                  0x21
  73
  74
  75 /* IEEE 1212 Address space map */
  76 #define CSR1212_ALL_SPACE_BASE                  (0x000000000000ULL)
  77 #define CSR1212_ALL_SPACE_SIZE                  (1ULL << 48)
  78 #define CSR1212_ALL_SPACE_END                   (CSR1212_ALL_SPACE_BASE + CSR1212_ALL_SPACE_SIZE)
  79
  80 #define  CSR1212_MEMORY_SPACE_BASE              (0x000000000000ULL)
  81 #define  CSR1212_MEMORY_SPACE_SIZE              ((256ULL * (1ULL << 40)) - (512ULL * (1ULL << 20)))
  82 #define  CSR1212_MEMORY_SPACE_END               (CSR1212_MEMORY_SPACE_BASE + CSR1212_MEMORY_SPACE_SIZE)
  83
  84 #define  CSR1212_PRIVATE_SPACE_BASE             (0xffffe0000000ULL)
  85 #define  CSR1212_PRIVATE_SPACE_SIZE             (256ULL * (1ULL << 20))
  86 #define  CSR1212_PRIVATE_SPACE_END              (CSR1212_PRIVATE_SPACE_BASE + CSR1212_PRIVATE_SPACE_SIZE)
  87
  88 #define  CSR1212_REGISTER_SPACE_BASE            (0xfffff0000000ULL)
  89 #define  CSR1212_REGISTER_SPACE_SIZE            (256ULL * (1ULL << 20))
  90 #define  CSR1212_REGISTER_SPACE_END             (CSR1212_REGISTER_SPACE_BASE + CSR1212_REGISTER_SPACE_SIZE)
  91
  92 #define  CSR1212_CSR_ARCH_REG_SPACE_BASE        (0xfffff0000000ULL)
  93 #define  CSR1212_CSR_ARCH_REG_SPACE_SIZE        (512)
  94 #define  CSR1212_CSR_ARCH_REG_SPACE_END         (CSR1212_CSR_ARCH_REG_SPACE_BASE + CSR1212_CSR_ARCH_REG_SPACE_SIZE)
  95 #define  CSR1212_CSR_ARCH_REG_SPACE_OFFSET      (CSR1212_CSR_ARCH_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
  96
  97 #define  CSR1212_CSR_BUS_DEP_REG_SPACE_BASE     (0xfffff0000200ULL)
  98 #define  CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE     (512)
  99 #define  CSR1212_CSR_BUS_DEP_REG_SPACE_END      (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE + CSR1212_CSR_BUS_DEP_REG_SPACE_SIZE)
 100 #define  CSR1212_CSR_BUS_DEP_REG_SPACE_OFFSET   (CSR1212_CSR_BUS_DEP_REG_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
 101
 102 #define  CSR1212_CONFIG_ROM_SPACE_BASE          (0xfffff0000400ULL)
 103 #define  CSR1212_CONFIG_ROM_SPACE_SIZE          (1024)
 104 #define  CSR1212_CONFIG_ROM_SPACE_END           (CSR1212_CONFIG_ROM_SPACE_BASE + CSR1212_CONFIG_ROM_SPACE_SIZE)
 105 #define  CSR1212_CONFIG_ROM_SPACE_OFFSET        (CSR1212_CONFIG_ROM_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
 106
 107 #define  CSR1212_UNITS_SPACE_BASE               (0xfffff0000800ULL)
 108 #define  CSR1212_UNITS_SPACE_SIZE               ((256ULL * (1ULL << 20)) - 2048)
 109 #define  CSR1212_UNITS_SPACE_END                (CSR1212_UNITS_SPACE_BASE + CSR1212_UNITS_SPACE_SIZE)
 110 #define  CSR1212_UNITS_SPACE_OFFSET             (CSR1212_UNITS_SPACE_BASE - CSR1212_REGISTER_SPACE_BASE)
 111
 112 #define  CSR1212_INVALID_ADDR_SPACE             -1
 113
 114
 115 /* Config ROM image structures */
 116 struct csr1212_bus_info_block_img {
 117         u_int8_t length;
 118         u_int8_t crc_length;
 119         u_int16_t crc;
 120
 121         /* Must be last */
 122         u_int32_t data[0];      /* older gcc can't handle [] which is standard */
 123 };
 124
 125 typedef u_int32_t csr1212_quad_t;
 126
 127 struct csr1212_leaf {
 128         int len;
 129         u_int32_t *data;
 130 };
 131
 132 struct csr1212_dentry {
 133         struct csr1212_dentry *next, *prev;
 134         struct csr1212_keyval *kv;
 135 };
 136
 137 struct csr1212_directory {
 138         int len;
 139         struct csr1212_dentry *dentries_head, *dentries_tail;
 140 };
 141
 142 struct csr1212_keyval {
 143         struct {
 144                 u_int8_t type;
 145                 u_int8_t id;
 146         } key;
 147         union {
 148                 u_int32_t immediate;
 149                 u_int32_t csr_offset;
 150                 struct csr1212_leaf leaf;
 151                 struct csr1212_directory directory;
 152         } value;
 153         struct csr1212_keyval *associate;
 154         int refcnt;
 155
 156         /* used in generating and/or parsing CSR image */
 157         struct csr1212_keyval *next, *prev;     /* flat list of CSR elements */
 158         u_int32_t offset;       /* position in CSR from 0xffff f000 0000 */
 159         u_int8_t valid;         /* flag indicating keyval has valid data*/
 160 };
 161
 162
 163 struct csr1212_cache_region {
 164         struct csr1212_cache_region *next, *prev;
 165         u_int32_t offset_start;         /* inclusive */
 166         u_int32_t offset_end;           /* exclusive */
 167 };
 168
 169 struct csr1212_csr_rom_cache {
 170         struct csr1212_csr_rom_cache *next, *prev;
 171         struct csr1212_cache_region *filled_head, *filled_tail;
 172         struct csr1212_keyval *layout_head, *layout_tail;
 173         size_t size;
 174         u_int32_t offset;
 175         struct csr1212_keyval *ext_rom;
 176         size_t len;
 177
 178         /* Must be last */
 179         u_int32_t data[0];      /* older gcc can't handle [] which is standard */
 180 };
 181
 182 struct csr1212_csr {
 183         size_t bus_info_len;    /* bus info block length in bytes */
 184         size_t crc_len;         /* crc length in bytes */
 185         u_int32_t *bus_info_data;       /* bus info data incl bus name and EUI */
 186
 187         void *private;          /* private, bus specific data */
 188         struct csr1212_bus_ops *ops;
 189
 190         struct csr1212_keyval *root_kv;
 191
 192         int max_rom;            /* max bytes readable in Config ROM region */
 193
 194         /* Items below used for image parsing and generation */
 195         struct csr1212_csr_rom_cache *cache_head, *cache_tail;
 196 };
 197
 198 struct csr1212_bus_ops {
 199         /* This function is used by csr1212 to read additional information
 200          * from remote nodes when parsing a Config ROM (i.e., read Config ROM
 201          * entries located in the Units Space.  Must return 0 on success
 202          * anything else indicates an error. */
 203         int (*bus_read) (struct csr1212_csr *csr, u_int64_t addr,
 204                          u_int16_t length, void *buffer, void *private);
 205
 206         /* This function is used by csr1212 to allocate a region in units space
 207          * in the event that Config ROM entries don't all fit in the predefined
 208          * 1K region.  The void *private parameter is private member of struct
 209          * csr1212_csr. */
 210         u_int64_t (*allocate_addr_range) (u_int64_t size, u_int32_t alignment,
 211                                           void *private);
 212
 213
 214         /* This function is used by csr1212 to release a region in units space
 215          * that is no longer needed. */
 216         void (*release_addr) (u_int64_t addr, void *private);
 217
 218         /* This function is used by csr1212 to determine the max read request
 219          * supported by a remote node when reading the ConfigROM space.  Must
 220          * return 0, 1, or 2 per IEEE 1212.  */
 221         int (*get_max_rom) (u_int32_t *bus_info, void *private);
 222 };
 223
 224
 225 /* Descriptor Leaf manipulation macros */
 226 #define CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT 24
 227 #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK 0xffffff
 228 #define CSR1212_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u_int32_t))
 229
 230 #define CSR1212_DESCRIPTOR_LEAF_TYPE(kv) \
 231         (be32_to_cpu((kv)->value.leaf.data[0]) >> CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT)
 232 #define CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) \
 233         (be32_to_cpu((kv)->value.leaf.data[0]) & \
 234          CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK)
 235
 236
 237 /* Text Descriptor Leaf manipulation macros */
 238 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT 28
 239 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_MASK 0xf /* after shift */
 240 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT 16
 241 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK 0xfff  /* after shift */
 242 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK 0xffff
 243 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD (1 * sizeof(u_int32_t))
 244
 245 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) \
 246         (be32_to_cpu((kv)->value.leaf.data[1]) >> \
 247          CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH_SHIFT)
 248 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) \
 249         ((be32_to_cpu((kv)->value.leaf.data[1]) >> \
 250           CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_SHIFT) & \
 251          CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET_MASK)
 252 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) \
 253         (be32_to_cpu((kv)->value.leaf.data[1]) & \
 254          CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE_MASK)
 255 #define CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv) \
 256         (&((kv)->value.leaf.data[2]))
 257
 258
 259 /* The following 2 function are for creating new Configuration ROM trees.  The
 260  * first function is used for both creating local trees and parsing remote
 261  * trees.  The second function adds pertinent information to local Configuration
 262  * ROM trees - namely data for the bus information block. */
 263 extern struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops,
 264                                               size_t bus_info_size,
 265                                               void *private);
 266 extern void csr1212_init_local_csr(struct csr1212_csr *csr,
 267                                    const u_int32_t *bus_info_data, int max_rom);
 268
 269
 270 /* Destroy a Configuration ROM tree and release all memory taken by the tree. */
 271 extern void csr1212_destroy_csr(struct csr1212_csr *csr);
 272
 273
 274 /* The following set of functions are fore creating new keyvals for placement in
 275  * a Configuration ROM tree.  Code that creates new keyvals with these functions
 276  * must release those keyvals with csr1212_release_keyval() when they are no
 277  * longer needed. */
 278 extern struct csr1212_keyval *csr1212_new_immediate(u_int8_t key, u_int32_t value);
 279 extern struct csr1212_keyval *csr1212_new_directory(u_int8_t key);
 280 extern struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s);
 281
 282
 283 /* The following function manages association between keyvals.  Typically,
 284  * Descriptor Leaves and Directories will be associated with another keyval and
 285  * it is desirable for the Descriptor keyval to be place immediately after the
 286  * keyval that it is associated with.
 287  * Take care with subsequent ROM modifications:  There is no function to remove
 288  * previously specified associations.
 289  */
 290 extern int csr1212_associate_keyval(struct csr1212_keyval *kv,
 291                                     struct csr1212_keyval *associate);
 292
 293
 294 /* The following functions manage the association of a keyval and directories.
 295  * A keyval may be attached to more than one directory. */
 296 extern int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
 297                                               struct csr1212_keyval *kv);
 298 extern void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir,
 299                                                  struct csr1212_keyval *kv);
 300
 301
 302 /* Creates a complete Configuration ROM image in the list of caches available
 303  * via csr->cache_head. */
 304 extern int csr1212_generate_csr_image(struct csr1212_csr *csr);
 305
 306
 307 /* This is a convience function for reading a block of data out of one of the
 308  * caches in the csr->cache_head list. */
 309 extern int csr1212_read(struct csr1212_csr *csr, u_int32_t offset, void *buffer,
 310                         u_int32_t len);
 311
 312
 313 /* The following functions are in place for parsing Configuration ROM images.
 314  * csr1212_parse_keyval() is used should there be a need to directly parse a
 315  * Configuration ROM directly. */
 316 extern int csr1212_parse_keyval(struct csr1212_keyval *kv,
 317                                 struct csr1212_csr_rom_cache *cache);
 318 extern int csr1212_parse_csr(struct csr1212_csr *csr);
 319
 320 /* These are internal functions referenced by inline functions below. */
 321 extern int _csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv);
 322 extern void _csr1212_destroy_keyval(struct csr1212_keyval *kv);
 323
 324
 325 /* This function allocates a new cache which may be used for either parsing or
 326  * generating sub-sets of Configuration ROM images. */
 327 static inline struct csr1212_csr_rom_cache *csr1212_rom_cache_malloc(u_int32_t offset,
 328                                                                      size_t size)
 329 {
 330         struct csr1212_csr_rom_cache *cache;
 331
 332         cache = CSR1212_MALLOC(sizeof(*cache) + size);
 333         if (!cache)
 334                 return NULL;
 335
 336         cache->next = NULL;
 337         cache->prev = NULL;
 338         cache->filled_head = NULL;
 339         cache->filled_tail = NULL;
 340         cache->layout_head = NULL;
 341         cache->layout_tail = NULL;
 342         cache->offset = offset;
 343         cache->size = size;
 344         cache->ext_rom = NULL;
 345
 346         return cache;
 347 }
 348
 349
 350 /* This function ensures that a keyval contains data when referencing a keyval
 351  * created by parsing a Configuration ROM. */
 352 static inline struct csr1212_keyval *csr1212_get_keyval(struct csr1212_csr *csr,
 353                                                         struct csr1212_keyval *kv)
 354 {
 355         if (!kv)
 356                 return NULL;
 357         if (!kv->valid)
 358                 if (_csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS)
 359                         return NULL;
 360         return kv;
 361 }
 362
 363
 364 /* This function increments the reference count for a keyval should there be a
 365  * need for code to retain a keyval that has been parsed. */
 366 static inline void csr1212_keep_keyval(struct csr1212_keyval *kv)
 367 {
 368         kv->refcnt++;
 369 }
 370
 371
 372 /* This function decrements a keyval's reference count and will destroy the
 373  * keyval when there are no more users of the keyval.  This should be called by
 374  * any code that calls csr1212_keep_keyval() or any of the keyval creation
 375  * routines csr1212_new_*(). */
 376 static inline void csr1212_release_keyval(struct csr1212_keyval *kv)
 377 {
 378         if (kv->refcnt > 1)
 379                 kv->refcnt--;
 380         else
 381                 _csr1212_destroy_keyval(kv);
 382 }
 383
 384
 385 /*
 386  * This macro allows for looping over the keyval entries in a directory and it
 387  * ensures that keyvals from remote ConfigROMs are parsed properly.
 388  *
 389  * _csr is a struct csr1212_csr * that points to CSR associated with dir.
 390  * _kv is a struct csr1212_keyval * that'll point to the current keyval (loop index).
 391  * _dir is a struct csr1212_keyval * that points to the directory to be looped.
 392  * _pos is a struct csr1212_dentry * that is used internally for indexing.
 393  *
 394  * kv will be NULL upon exit of the loop.
 395  */
 396 #define csr1212_for_each_dir_entry(_csr, _kv, _dir, _pos)                       \
 397         for (csr1212_get_keyval((_csr), (_dir)),                                \
 398              _pos = (_dir)->value.directory.dentries_head,                      \
 399              _kv = (_pos) ? csr1212_get_keyval((_csr), _pos->kv) : NULL;        \
 400              (_kv) && (_pos);                                                   \
 401              (_kv->associate == NULL) ?                                         \
 402                      ((_pos = _pos->next),                                      \
 403                       (_kv = (_pos) ? csr1212_get_keyval((_csr), _pos->kv) :    \
 404                           NULL)) :                                              \
 405                      (_kv = csr1212_get_keyval((_csr), _kv->associate)))
 406
 407
 408
 409 #endif /* __CSR1212_H__ */