sound/soc/intel/skylake/skl-sst-utils.c

   1 /*
   2  *  skl-sst-utils.c - SKL sst utils functions
   3  *
   4  *  Copyright (C) 2016 Intel Corp
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  */
  15
  16 #include <linux/device.h>
  17 #include <linux/slab.h>
  18 #include <linux/uuid.h>
  19 #include "skl-sst-dsp.h"
  20 #include "../common/sst-dsp.h"
  21 #include "../common/sst-dsp-priv.h"
  22 #include "skl-sst-ipc.h"
  23
  24
  25 #define UUID_STR_SIZE 37
  26 #define DEFAULT_HASH_SHA256_LEN 32
  27
  28 /* FW Extended Manifest Header id = $AE1 */
  29 #define SKL_EXT_MANIFEST_HEADER_MAGIC   0x31454124
  30
  31 struct UUID {
  32         u8 id[16];
  33 };
  34
  35 union seg_flags {
  36         u32 ul;
  37         struct {
  38                 u32 contents : 1;
  39                 u32 alloc    : 1;
  40                 u32 load     : 1;
  41                 u32 read_only : 1;
  42                 u32 code     : 1;
  43                 u32 data     : 1;
  44                 u32 _rsvd0   : 2;
  45                 u32 type     : 4;
  46                 u32 _rsvd1   : 4;
  47                 u32 length   : 16;
  48         } r;
  49 } __packed;
  50
  51 struct segment_desc {
  52         union seg_flags flags;
  53         u32 v_base_addr;
  54         u32 file_offset;
  55 };
  56
  57 struct module_type {
  58         u32 load_type  : 4;
  59         u32 auto_start : 1;
  60         u32 domain_ll  : 1;
  61         u32 domain_dp  : 1;
  62         u32 rsvd       : 25;
  63 } __packed;
  64
  65 struct adsp_module_entry {
  66         u32 struct_id;
  67         u8  name[8];
  68         struct UUID uuid;
  69         struct module_type type;
  70         u8  hash1[DEFAULT_HASH_SHA256_LEN];
  71         u32 entry_point;
  72         u16 cfg_offset;
  73         u16 cfg_count;
  74         u32 affinity_mask;
  75         u16 instance_max_count;
  76         u16 instance_bss_size;
  77         struct segment_desc segments[3];
  78 } __packed;
  79
  80 struct adsp_fw_hdr {
  81         u32 id;
  82         u32 len;
  83         u8  name[8];
  84         u32 preload_page_count;
  85         u32 fw_image_flags;
  86         u32 feature_mask;
  87         u16 major;
  88         u16 minor;
  89         u16 hotfix;
  90         u16 build;
  91         u32 num_modules;
  92         u32 hw_buf_base;
  93         u32 hw_buf_length;
  94         u32 load_offset;
  95 } __packed;
  96
  97 #define MAX_INSTANCE_BUFF 2
  98
  99 struct uuid_module {
 100         uuid_le uuid;
 101         int id;
 102         int is_loadable;
 103         int max_instance;
 104         u64 pvt_id[MAX_INSTANCE_BUFF];
 105         int *instance_id;
 106
 107         struct list_head list;
 108 };
 109
 110 struct skl_ext_manifest_hdr {
 111         u32 id;
 112         u32 len;
 113         u16 version_major;
 114         u16 version_minor;
 115         u32 entries;
 116 };
 117
 118 int snd_skl_get_module_info(struct skl_sst *ctx,
 119                                 struct skl_module_cfg *mconfig)
 120 {
 121         struct uuid_module *module;
 122         uuid_le *uuid_mod;
 123
 124         uuid_mod = (uuid_le *)mconfig->guid;
 125
 126         if (list_empty(&ctx->uuid_list)) {
 127                 dev_err(ctx->dev, "Module list is empty\n");
 128                 return -EINVAL;
 129         }
 130
 131         list_for_each_entry(module, &ctx->uuid_list, list) {
 132                 if (uuid_le_cmp(*uuid_mod, module->uuid) == 0) {
 133                         mconfig->id.module_id = module->id;
 134                         mconfig->is_loadable = module->is_loadable;
 135
 136                         return 0;
 137                 }
 138         }
 139
 140         return -EINVAL;
 141 }
 142 EXPORT_SYMBOL_GPL(snd_skl_get_module_info);
 143
 144 static int skl_get_pvtid_map(struct uuid_module *module, int instance_id)
 145 {
 146         int pvt_id;
 147
 148         for (pvt_id = 0; pvt_id < module->max_instance; pvt_id++) {
 149                 if (module->instance_id[pvt_id] == instance_id)
 150                         return pvt_id;
 151         }
 152         return -EINVAL;
 153 }
 154
 155 int skl_get_pvt_instance_id_map(struct skl_sst *ctx,
 156                                 int module_id, int instance_id)
 157 {
 158         struct uuid_module *module;
 159
 160         list_for_each_entry(module, &ctx->uuid_list, list) {
 161                 if (module->id == module_id)
 162                         return skl_get_pvtid_map(module, instance_id);
 163         }
 164
 165         return -EINVAL;
 166 }
 167 EXPORT_SYMBOL_GPL(skl_get_pvt_instance_id_map);
 168
 169 static inline int skl_getid_32(struct uuid_module *module, u64 *val,
 170                                 int word1_mask, int word2_mask)
 171 {
 172         int index, max_inst, pvt_id;
 173         u32 mask_val;
 174
 175         max_inst =  module->max_instance;
 176         mask_val = (u32)(*val >> word1_mask);
 177
 178         if (mask_val != 0xffffffff) {
 179                 index = ffz(mask_val);
 180                 pvt_id = index + word1_mask + word2_mask;
 181                 if (pvt_id <= (max_inst - 1)) {
 182                         *val |= 1ULL << (index + word1_mask);
 183                         return pvt_id;
 184                 }
 185         }
 186
 187         return -EINVAL;
 188 }
 189
 190 static inline int skl_pvtid_128(struct uuid_module *module)
 191 {
 192         int j, i, word1_mask, word2_mask = 0, pvt_id;
 193
 194         for (j = 0; j < MAX_INSTANCE_BUFF; j++) {
 195                 word1_mask = 0;
 196
 197                 for (i = 0; i < 2; i++) {
 198                         pvt_id = skl_getid_32(module, &module->pvt_id[j],
 199                                                 word1_mask, word2_mask);
 200                         if (pvt_id >= 0)
 201                                 return pvt_id;
 202
 203                         word1_mask += 32;
 204                         if ((word1_mask + word2_mask) >= module->max_instance)
 205                                 return -EINVAL;
 206                 }
 207
 208                 word2_mask += 64;
 209                 if (word2_mask >= module->max_instance)
 210                         return -EINVAL;
 211         }
 212
 213         return -EINVAL;
 214 }
 215
 216 /**
 217  * skl_get_pvt_id: generate a private id for use as module id
 218  *
 219  * @ctx: driver context
 220  * @mconfig: module configuration data
 221  *
 222  * This generates a 128 bit private unique id for a module TYPE so that
 223  * module instance is unique
 224  */
 225 int skl_get_pvt_id(struct skl_sst *ctx, struct skl_module_cfg *mconfig)
 226 {
 227         struct uuid_module *module;
 228         uuid_le *uuid_mod;
 229         int pvt_id;
 230
 231         uuid_mod = (uuid_le *)mconfig->guid;
 232
 233         list_for_each_entry(module, &ctx->uuid_list, list) {
 234                 if (uuid_le_cmp(*uuid_mod, module->uuid) == 0) {
 235
 236                         pvt_id = skl_pvtid_128(module);
 237                         if (pvt_id >= 0) {
 238                                 module->instance_id[pvt_id] =
 239                                                 mconfig->id.instance_id;
 240                                 return pvt_id;
 241                         }
 242                 }
 243         }
 244
 245         return -EINVAL;
 246 }
 247 EXPORT_SYMBOL_GPL(skl_get_pvt_id);
 248
 249 /**
 250  * skl_put_pvt_id: free up the private id allocated
 251  *
 252  * @ctx: driver context
 253  * @mconfig: module configuration data
 254  *
 255  * This frees a 128 bit private unique id previously generated
 256  */
 257 int skl_put_pvt_id(struct skl_sst *ctx, struct skl_module_cfg *mconfig)
 258 {
 259         int i;
 260         uuid_le *uuid_mod;
 261         struct uuid_module *module;
 262
 263         uuid_mod = (uuid_le *)mconfig->guid;
 264         list_for_each_entry(module, &ctx->uuid_list, list) {
 265                 if (uuid_le_cmp(*uuid_mod, module->uuid) == 0) {
 266
 267                         if (mconfig->id.pvt_id != 0)
 268                                 i = (mconfig->id.pvt_id) / 64;
 269                         else
 270                                 i = 0;
 271
 272                         module->pvt_id[i] &= ~(1 << (mconfig->id.pvt_id));
 273                         mconfig->id.pvt_id = -1;
 274                         return 0;
 275                 }
 276         }
 277
 278         return -EINVAL;
 279 }
 280 EXPORT_SYMBOL_GPL(skl_put_pvt_id);
 281
 282 /*
 283  * Parse the firmware binary to get the UUID, module id
 284  * and loadable flags
 285  */
 286 int snd_skl_parse_uuids(struct sst_dsp *ctx, const struct firmware *fw,
 287                         unsigned int offset, int index)
 288 {
 289         struct adsp_fw_hdr *adsp_hdr;
 290         struct adsp_module_entry *mod_entry;
 291         int i, num_entry, size;
 292         uuid_le *uuid_bin;
 293         const char *buf;
 294         struct skl_sst *skl = ctx->thread_context;
 295         struct uuid_module *module;
 296         struct firmware stripped_fw;
 297         unsigned int safe_file;
 298
 299         /* Get the FW pointer to derive ADSP header */
 300         stripped_fw.data = fw->data;
 301         stripped_fw.size = fw->size;
 302
 303         skl_dsp_strip_extended_manifest(&stripped_fw);
 304
 305         buf = stripped_fw.data;
 306
 307         /* check if we have enough space in file to move to header */
 308         safe_file = sizeof(*adsp_hdr) + offset;
 309         if (stripped_fw.size <= safe_file) {
 310                 dev_err(ctx->dev, "Small fw file size, No space for hdr\n");
 311                 return -EINVAL;
 312         }
 313
 314         adsp_hdr = (struct adsp_fw_hdr *)(buf + offset);
 315
 316         /* check 1st module entry is in file */
 317         safe_file += adsp_hdr->len + sizeof(*mod_entry);
 318         if (stripped_fw.size <= safe_file) {
 319                 dev_err(ctx->dev, "Small fw file size, No module entry\n");
 320                 return -EINVAL;
 321         }
 322
 323         mod_entry = (struct adsp_module_entry *)
 324                 (buf + offset + adsp_hdr->len);
 325
 326         num_entry = adsp_hdr->num_modules;
 327
 328         /* check all entries are in file */
 329         safe_file += num_entry * sizeof(*mod_entry);
 330         if (stripped_fw.size <= safe_file) {
 331                 dev_err(ctx->dev, "Small fw file size, No modules\n");
 332                 return -EINVAL;
 333         }
 334
 335
 336         /*
 337          * Read the UUID(GUID) from FW Manifest.
 338          *
 339          * The 16 byte UUID format is: XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXX
 340          * Populate the UUID table to store module_id and loadable flags
 341          * for the module.
 342          */
 343
 344         for (i = 0; i < num_entry; i++, mod_entry++) {
 345                 module = kzalloc(sizeof(*module), GFP_KERNEL);
 346                 if (!module)
 347                         return -ENOMEM;
 348
 349                 uuid_bin = (uuid_le *)mod_entry->uuid.id;
 350                 memcpy(&module->uuid, uuid_bin, sizeof(module->uuid));
 351
 352                 module->id = (i | (index << 12));
 353                 module->is_loadable = mod_entry->type.load_type;
 354                 module->max_instance = mod_entry->instance_max_count;
 355                 size = sizeof(int) * mod_entry->instance_max_count;
 356                 module->instance_id = devm_kzalloc(ctx->dev, size, GFP_KERNEL);
 357                 if (!module->instance_id) {
 358                         kfree(module);
 359                         return -ENOMEM;
 360                 }
 361
 362                 list_add_tail(&module->list, &skl->uuid_list);
 363
 364                 dev_dbg(ctx->dev,
 365                         "Adding uuid :%pUL   mod id: %d  Loadable: %d\n",
 366                         &module->uuid, module->id, module->is_loadable);
 367         }
 368
 369         return 0;
 370 }
 371
 372 void skl_freeup_uuid_list(struct skl_sst *ctx)
 373 {
 374         struct uuid_module *uuid, *_uuid;
 375
 376         list_for_each_entry_safe(uuid, _uuid, &ctx->uuid_list, list) {
 377                 list_del(&uuid->list);
 378                 kfree(uuid);
 379         }
 380 }
 381
 382 /*
 383  * some firmware binary contains some extended manifest. This needs
 384  * to be stripped in that case before we load and use that image.
 385  *
 386  * Get the module id for the module by checking
 387  * the table for the UUID for the module
 388  */
 389 int skl_dsp_strip_extended_manifest(struct firmware *fw)
 390 {
 391         struct skl_ext_manifest_hdr *hdr;
 392
 393         /* check if fw file is greater than header we are looking */
 394         if (fw->size < sizeof(hdr)) {
 395                 pr_err("%s: Firmware file small, no hdr\n", __func__);
 396                 return -EINVAL;
 397         }
 398
 399         hdr = (struct skl_ext_manifest_hdr *)fw->data;
 400
 401         if (hdr->id == SKL_EXT_MANIFEST_HEADER_MAGIC) {
 402                 fw->size -= hdr->len;
 403                 fw->data += hdr->len;
 404         }
 405
 406         return 0;
 407 }