sound/soc/intel/sst-firmware.c

   1 /*
   2  * Intel SST Firmware Loader
   3  *
   4  * Copyright (C) 2013, Intel Corporation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/sched.h>
  20 #include <linux/firmware.h>
  21 #include <linux/export.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/dmaengine.h>
  25 #include <linux/pci.h>
  26 #include <linux/acpi.h>
  27
  28 /* supported DMA engine drivers */
  29 #include <linux/platform_data/dma-dw.h>
  30 #include <linux/dma/dw.h>
  31
  32 #include <asm/page.h>
  33 #include <asm/pgtable.h>
  34
  35 #include "sst-dsp.h"
  36 #include "sst-dsp-priv.h"
  37
  38 #define SST_DMA_RESOURCES       2
  39 #define SST_DSP_DMA_MAX_BURST   0x3
  40 #define SST_HSW_BLOCK_ANY       0xffffffff
  41
  42 #define SST_HSW_MASK_DMA_ADDR_DSP 0xfff00000
  43
  44 struct sst_dma {
  45         struct sst_dsp *sst;
  46
  47         struct dw_dma_chip *chip;
  48
  49         struct dma_async_tx_descriptor *desc;
  50         struct dma_chan *ch;
  51 };
  52
  53 static inline void sst_memcpy32(volatile void __iomem *dest, void *src, u32 bytes)
  54 {
  55         /* __iowrite32_copy use 32bit size values so divide by 4 */
  56         __iowrite32_copy((void *)dest, src, bytes/4);
  57 }
  58
  59 static void sst_dma_transfer_complete(void *arg)
  60 {
  61         struct sst_dsp *sst = (struct sst_dsp *)arg;
  62
  63         dev_dbg(sst->dev, "DMA: callback\n");
  64 }
  65
  66 static int sst_dsp_dma_copy(struct sst_dsp *sst, dma_addr_t dest_addr,
  67         dma_addr_t src_addr, size_t size)
  68 {
  69         struct dma_async_tx_descriptor *desc;
  70         struct sst_dma *dma = sst->dma;
  71
  72         if (dma->ch == NULL) {
  73                 dev_err(sst->dev, "error: no DMA channel\n");
  74                 return -ENODEV;
  75         }
  76
  77         dev_dbg(sst->dev, "DMA: src: 0x%lx dest 0x%lx size %zu\n",
  78                 (unsigned long)src_addr, (unsigned long)dest_addr, size);
  79
  80         desc = dma->ch->device->device_prep_dma_memcpy(dma->ch, dest_addr,
  81                 src_addr, size, DMA_CTRL_ACK);
  82         if (!desc){
  83                 dev_err(sst->dev, "error: dma prep memcpy failed\n");
  84                 return -EINVAL;
  85         }
  86
  87         desc->callback = sst_dma_transfer_complete;
  88         desc->callback_param = sst;
  89
  90         desc->tx_submit(desc);
  91         dma_wait_for_async_tx(desc);
  92
  93         return 0;
  94 }
  95
  96 /* copy to DSP */
  97 int sst_dsp_dma_copyto(struct sst_dsp *sst, dma_addr_t dest_addr,
  98         dma_addr_t src_addr, size_t size)
  99 {
 100         return sst_dsp_dma_copy(sst, dest_addr | SST_HSW_MASK_DMA_ADDR_DSP,
 101                         src_addr, size);
 102 }
 103 EXPORT_SYMBOL_GPL(sst_dsp_dma_copyto);
 104
 105 /* copy from DSP */
 106 int sst_dsp_dma_copyfrom(struct sst_dsp *sst, dma_addr_t dest_addr,
 107         dma_addr_t src_addr, size_t size)
 108 {
 109         return sst_dsp_dma_copy(sst, dest_addr,
 110                 src_addr | SST_HSW_MASK_DMA_ADDR_DSP, size);
 111 }
 112 EXPORT_SYMBOL_GPL(sst_dsp_dma_copyfrom);
 113
 114 /* remove module from memory - callers hold locks */
 115 static void block_list_remove(struct sst_dsp *dsp,
 116         struct list_head *block_list)
 117 {
 118         struct sst_mem_block *block, *tmp;
 119         int err;
 120
 121         /* disable each block  */
 122         list_for_each_entry(block, block_list, module_list) {
 123
 124                 if (block->ops && block->ops->disable) {
 125                         err = block->ops->disable(block);
 126                         if (err < 0)
 127                                 dev_err(dsp->dev,
 128                                         "error: cant disable block %d:%d\n",
 129                                         block->type, block->index);
 130                 }
 131         }
 132
 133         /* mark each block as free */
 134         list_for_each_entry_safe(block, tmp, block_list, module_list) {
 135                 list_del(&block->module_list);
 136                 list_move(&block->list, &dsp->free_block_list);
 137                 dev_dbg(dsp->dev, "block freed %d:%d at offset 0x%x\n",
 138                         block->type, block->index, block->offset);
 139         }
 140 }
 141
 142 /* prepare the memory block to receive data from host - callers hold locks */
 143 static int block_list_prepare(struct sst_dsp *dsp,
 144         struct list_head *block_list)
 145 {
 146         struct sst_mem_block *block;
 147         int ret = 0;
 148
 149         /* enable each block so that's it'e ready for data */
 150         list_for_each_entry(block, block_list, module_list) {
 151
 152                 if (block->ops && block->ops->enable && !block->users) {
 153                         ret = block->ops->enable(block);
 154                         if (ret < 0) {
 155                                 dev_err(dsp->dev,
 156                                         "error: cant disable block %d:%d\n",
 157                                         block->type, block->index);
 158                                 goto err;
 159                         }
 160                 }
 161         }
 162         return ret;
 163
 164 err:
 165         list_for_each_entry(block, block_list, module_list) {
 166                 if (block->ops && block->ops->disable)
 167                         block->ops->disable(block);
 168         }
 169         return ret;
 170 }
 171
 172 static struct dw_dma_platform_data dw_pdata = {
 173         .is_private = 1,
 174         .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
 175         .chan_priority = CHAN_PRIORITY_ASCENDING,
 176 };
 177
 178 static struct dw_dma_chip *dw_probe(struct device *dev, struct resource *mem,
 179         int irq)
 180 {
 181         struct dw_dma_chip *chip;
 182         int err;
 183
 184         chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
 185         if (!chip)
 186                 return ERR_PTR(-ENOMEM);
 187
 188         chip->irq = irq;
 189         chip->regs = devm_ioremap_resource(dev, mem);
 190         if (IS_ERR(chip->regs))
 191                 return ERR_CAST(chip->regs);
 192
 193         err = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(31));
 194         if (err)
 195                 return ERR_PTR(err);
 196
 197         chip->dev = dev;
 198         err = dw_dma_probe(chip, &dw_pdata);
 199         if (err)
 200                 return ERR_PTR(err);
 201
 202         return chip;
 203 }
 204
 205 static void dw_remove(struct dw_dma_chip *chip)
 206 {
 207         dw_dma_remove(chip);
 208 }
 209
 210 static bool dma_chan_filter(struct dma_chan *chan, void *param)
 211 {
 212         struct sst_dsp *dsp = (struct sst_dsp *)param;
 213
 214         return chan->device->dev == dsp->dma_dev;
 215 }
 216
 217 int sst_dsp_dma_get_channel(struct sst_dsp *dsp, int chan_id)
 218 {
 219         struct sst_dma *dma = dsp->dma;
 220         struct dma_slave_config slave;
 221         dma_cap_mask_t mask;
 222         int ret;
 223
 224         /* The Intel MID DMA engine driver needs the slave config set but
 225          * Synopsis DMA engine driver safely ignores the slave config */
 226         dma_cap_zero(mask);
 227         dma_cap_set(DMA_SLAVE, mask);
 228         dma_cap_set(DMA_MEMCPY, mask);
 229
 230         dma->ch = dma_request_channel(mask, dma_chan_filter, dsp);
 231         if (dma->ch == NULL) {
 232                 dev_err(dsp->dev, "error: DMA request channel failed\n");
 233                 return -EIO;
 234         }
 235
 236         memset(&slave, 0, sizeof(slave));
 237         slave.direction = DMA_MEM_TO_DEV;
 238         slave.src_addr_width =
 239                 slave.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 240         slave.src_maxburst = slave.dst_maxburst = SST_DSP_DMA_MAX_BURST;
 241
 242         ret = dmaengine_slave_config(dma->ch, &slave);
 243         if (ret) {
 244                 dev_err(dsp->dev, "error: unable to set DMA slave config %d\n",
 245                         ret);
 246                 dma_release_channel(dma->ch);
 247                 dma->ch = NULL;
 248         }
 249
 250         return ret;
 251 }
 252 EXPORT_SYMBOL_GPL(sst_dsp_dma_get_channel);
 253
 254 void sst_dsp_dma_put_channel(struct sst_dsp *dsp)
 255 {
 256         struct sst_dma *dma = dsp->dma;
 257
 258         if (!dma->ch)
 259                 return;
 260
 261         dma_release_channel(dma->ch);
 262         dma->ch = NULL;
 263 }
 264 EXPORT_SYMBOL_GPL(sst_dsp_dma_put_channel);
 265
 266 int sst_dma_new(struct sst_dsp *sst)
 267 {
 268         struct sst_pdata *sst_pdata = sst->pdata;
 269         struct sst_dma *dma;
 270         struct resource mem;
 271         const char *dma_dev_name;
 272         int ret = 0;
 273
 274         /* configure the correct platform data for whatever DMA engine
 275         * is attached to the ADSP IP. */
 276         switch (sst->pdata->dma_engine) {
 277         case SST_DMA_TYPE_DW:
 278                 dma_dev_name = "dw_dmac";
 279                 break;
 280         case SST_DMA_TYPE_MID:
 281                 dma_dev_name = "Intel MID DMA";
 282                 break;
 283         default:
 284                 dev_err(sst->dev, "error: invalid DMA engine %d\n",
 285                         sst->pdata->dma_engine);
 286                 return -EINVAL;
 287         }
 288
 289         dma = devm_kzalloc(sst->dev, sizeof(struct sst_dma), GFP_KERNEL);
 290         if (!dma)
 291                 return -ENOMEM;
 292
 293         dma->sst = sst;
 294
 295         memset(&mem, 0, sizeof(mem));
 296
 297         mem.start = sst->addr.lpe_base + sst_pdata->dma_base;
 298         mem.end   = sst->addr.lpe_base + sst_pdata->dma_base + sst_pdata->dma_size - 1;
 299         mem.flags = IORESOURCE_MEM;
 300
 301         /* now register DMA engine device */
 302         dma->chip = dw_probe(sst->dma_dev, &mem, sst_pdata->irq);
 303         if (IS_ERR(dma->chip)) {
 304                 dev_err(sst->dev, "error: DMA device register failed\n");
 305                 ret = PTR_ERR(dma->chip);
 306                 goto err_dma_dev;
 307         }
 308
 309         sst->dma = dma;
 310         sst->fw_use_dma = true;
 311         return 0;
 312
 313 err_dma_dev:
 314         devm_kfree(sst->dev, dma);
 315         return ret;
 316 }
 317 EXPORT_SYMBOL(sst_dma_new);
 318
 319 void sst_dma_free(struct sst_dma *dma)
 320 {
 321
 322         if (dma == NULL)
 323                 return;
 324
 325         if (dma->ch)
 326                 dma_release_channel(dma->ch);
 327
 328         if (dma->chip)
 329                 dw_remove(dma->chip);
 330
 331 }
 332 EXPORT_SYMBOL(sst_dma_free);
 333
 334 /* create new generic firmware object */
 335 struct sst_fw *sst_fw_new(struct sst_dsp *dsp,
 336         const struct firmware *fw, void *private)
 337 {
 338         struct sst_fw *sst_fw;
 339         int err;
 340
 341         if (!dsp->ops->parse_fw)
 342                 return NULL;
 343
 344         sst_fw = kzalloc(sizeof(*sst_fw), GFP_KERNEL);
 345         if (sst_fw == NULL)
 346                 return NULL;
 347
 348         sst_fw->dsp = dsp;
 349         sst_fw->private = private;
 350         sst_fw->size = fw->size;
 351
 352         /* allocate DMA buffer to store FW data */
 353         sst_fw->dma_buf = dma_alloc_coherent(dsp->dma_dev, sst_fw->size,
 354                                 &sst_fw->dmable_fw_paddr, GFP_DMA | GFP_KERNEL);
 355         if (!sst_fw->dma_buf) {
 356                 dev_err(dsp->dev, "error: DMA alloc failed\n");
 357                 kfree(sst_fw);
 358                 return NULL;
 359         }
 360
 361         /* copy FW data to DMA-able memory */
 362         memcpy((void *)sst_fw->dma_buf, (void *)fw->data, fw->size);
 363
 364         if (dsp->fw_use_dma) {
 365                 err = sst_dsp_dma_get_channel(dsp, 0);
 366                 if (err < 0)
 367                         goto chan_err;
 368         }
 369
 370         /* call core specific FW paser to load FW data into DSP */
 371         err = dsp->ops->parse_fw(sst_fw);
 372         if (err < 0) {
 373                 dev_err(dsp->dev, "error: parse fw failed %d\n", err);
 374                 goto parse_err;
 375         }
 376
 377         if (dsp->fw_use_dma)
 378                 sst_dsp_dma_put_channel(dsp);
 379
 380         mutex_lock(&dsp->mutex);
 381         list_add(&sst_fw->list, &dsp->fw_list);
 382         mutex_unlock(&dsp->mutex);
 383
 384         return sst_fw;
 385
 386 parse_err:
 387         if (dsp->fw_use_dma)
 388                 sst_dsp_dma_put_channel(dsp);
 389 chan_err:
 390         dma_free_coherent(dsp->dma_dev, sst_fw->size,
 391                                 sst_fw->dma_buf,
 392                                 sst_fw->dmable_fw_paddr);
 393         sst_fw->dma_buf = NULL;
 394         kfree(sst_fw);
 395         return NULL;
 396 }
 397 EXPORT_SYMBOL_GPL(sst_fw_new);
 398
 399 int sst_fw_reload(struct sst_fw *sst_fw)
 400 {
 401         struct sst_dsp *dsp = sst_fw->dsp;
 402         int ret;
 403
 404         dev_dbg(dsp->dev, "reloading firmware\n");
 405
 406         /* call core specific FW paser to load FW data into DSP */
 407         ret = dsp->ops->parse_fw(sst_fw);
 408         if (ret < 0)
 409                 dev_err(dsp->dev, "error: parse fw failed %d\n", ret);
 410
 411         return ret;
 412 }
 413 EXPORT_SYMBOL_GPL(sst_fw_reload);
 414
 415 void sst_fw_unload(struct sst_fw *sst_fw)
 416 {
 417         struct sst_dsp *dsp = sst_fw->dsp;
 418         struct sst_module *module, *mtmp;
 419         struct sst_module_runtime *runtime, *rtmp;
 420
 421         dev_dbg(dsp->dev, "unloading firmware\n");
 422
 423         mutex_lock(&dsp->mutex);
 424
 425         /* check module by module */
 426         list_for_each_entry_safe(module, mtmp, &dsp->module_list, list) {
 427                 if (module->sst_fw == sst_fw) {
 428
 429                         /* remove runtime modules */
 430                         list_for_each_entry_safe(runtime, rtmp, &module->runtime_list, list) {
 431
 432                                 block_list_remove(dsp, &runtime->block_list);
 433                                 list_del(&runtime->list);
 434                                 kfree(runtime);
 435                         }
 436
 437                         /* now remove the module */
 438                         block_list_remove(dsp, &module->block_list);
 439                         list_del(&module->list);
 440                         kfree(module);
 441                 }
 442         }
 443
 444         /* remove all scratch blocks */
 445         block_list_remove(dsp, &dsp->scratch_block_list);
 446
 447         mutex_unlock(&dsp->mutex);
 448 }
 449 EXPORT_SYMBOL_GPL(sst_fw_unload);
 450
 451 /* free single firmware object */
 452 void sst_fw_free(struct sst_fw *sst_fw)
 453 {
 454         struct sst_dsp *dsp = sst_fw->dsp;
 455
 456         mutex_lock(&dsp->mutex);
 457         list_del(&sst_fw->list);
 458         mutex_unlock(&dsp->mutex);
 459
 460         if (sst_fw->dma_buf)
 461                 dma_free_coherent(dsp->dma_dev, sst_fw->size, sst_fw->dma_buf,
 462                         sst_fw->dmable_fw_paddr);
 463         kfree(sst_fw);
 464 }
 465 EXPORT_SYMBOL_GPL(sst_fw_free);
 466
 467 /* free all firmware objects */
 468 void sst_fw_free_all(struct sst_dsp *dsp)
 469 {
 470         struct sst_fw *sst_fw, *t;
 471
 472         mutex_lock(&dsp->mutex);
 473         list_for_each_entry_safe(sst_fw, t, &dsp->fw_list, list) {
 474
 475                 list_del(&sst_fw->list);
 476                 dma_free_coherent(dsp->dev, sst_fw->size, sst_fw->dma_buf,
 477                         sst_fw->dmable_fw_paddr);
 478                 kfree(sst_fw);
 479         }
 480         mutex_unlock(&dsp->mutex);
 481 }
 482 EXPORT_SYMBOL_GPL(sst_fw_free_all);
 483
 484 /* create a new SST generic module from FW template */
 485 struct sst_module *sst_module_new(struct sst_fw *sst_fw,
 486         struct sst_module_template *template, void *private)
 487 {
 488         struct sst_dsp *dsp = sst_fw->dsp;
 489         struct sst_module *sst_module;
 490
 491         sst_module = kzalloc(sizeof(*sst_module), GFP_KERNEL);
 492         if (sst_module == NULL)
 493                 return NULL;
 494
 495         sst_module->id = template->id;
 496         sst_module->dsp = dsp;
 497         sst_module->sst_fw = sst_fw;
 498         sst_module->scratch_size = template->scratch_size;
 499         sst_module->persistent_size = template->persistent_size;
 500
 501         INIT_LIST_HEAD(&sst_module->block_list);
 502         INIT_LIST_HEAD(&sst_module->runtime_list);
 503
 504         mutex_lock(&dsp->mutex);
 505         list_add(&sst_module->list, &dsp->module_list);
 506         mutex_unlock(&dsp->mutex);
 507
 508         return sst_module;
 509 }
 510 EXPORT_SYMBOL_GPL(sst_module_new);
 511
 512 /* free firmware module and remove from available list */
 513 void sst_module_free(struct sst_module *sst_module)
 514 {
 515         struct sst_dsp *dsp = sst_module->dsp;
 516
 517         mutex_lock(&dsp->mutex);
 518         list_del(&sst_module->list);
 519         mutex_unlock(&dsp->mutex);
 520
 521         kfree(sst_module);
 522 }
 523 EXPORT_SYMBOL_GPL(sst_module_free);
 524
 525 struct sst_module_runtime *sst_module_runtime_new(struct sst_module *module,
 526         int id, void *private)
 527 {
 528         struct sst_dsp *dsp = module->dsp;
 529         struct sst_module_runtime *runtime;
 530
 531         runtime = kzalloc(sizeof(*runtime), GFP_KERNEL);
 532         if (runtime == NULL)
 533                 return NULL;
 534
 535         runtime->id = id;
 536         runtime->dsp = dsp;
 537         runtime->module = module;
 538         INIT_LIST_HEAD(&runtime->block_list);
 539
 540         mutex_lock(&dsp->mutex);
 541         list_add(&runtime->list, &module->runtime_list);
 542         mutex_unlock(&dsp->mutex);
 543
 544         return runtime;
 545 }
 546 EXPORT_SYMBOL_GPL(sst_module_runtime_new);
 547
 548 void sst_module_runtime_free(struct sst_module_runtime *runtime)
 549 {
 550         struct sst_dsp *dsp = runtime->dsp;
 551
 552         mutex_lock(&dsp->mutex);
 553         list_del(&runtime->list);
 554         mutex_unlock(&dsp->mutex);
 555
 556         kfree(runtime);
 557 }
 558 EXPORT_SYMBOL_GPL(sst_module_runtime_free);
 559
 560 static struct sst_mem_block *find_block(struct sst_dsp *dsp,
 561         struct sst_block_allocator *ba)
 562 {
 563         struct sst_mem_block *block;
 564
 565         list_for_each_entry(block, &dsp->free_block_list, list) {
 566                 if (block->type == ba->type && block->offset == ba->offset)
 567                         return block;
 568         }
 569
 570         return NULL;
 571 }
 572
 573 /* Block allocator must be on block boundary */
 574 static int block_alloc_contiguous(struct sst_dsp *dsp,
 575         struct sst_block_allocator *ba, struct list_head *block_list)
 576 {
 577         struct list_head tmp = LIST_HEAD_INIT(tmp);
 578         struct sst_mem_block *block;
 579         u32 block_start = SST_HSW_BLOCK_ANY;
 580         int size = ba->size, offset = ba->offset;
 581
 582         while (ba->size > 0) {
 583
 584                 block = find_block(dsp, ba);
 585                 if (!block) {
 586                         list_splice(&tmp, &dsp->free_block_list);
 587
 588                         ba->size = size;
 589                         ba->offset = offset;
 590                         return -ENOMEM;
 591                 }
 592
 593                 list_move_tail(&block->list, &tmp);
 594                 ba->offset += block->size;
 595                 ba->size -= block->size;
 596         }
 597         ba->size = size;
 598         ba->offset = offset;
 599
 600         list_for_each_entry(block, &tmp, list) {
 601
 602                 if (block->offset < block_start)
 603                         block_start = block->offset;
 604
 605                 list_add(&block->module_list, block_list);
 606
 607                 dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
 608                         block->type, block->index, block->offset);
 609         }
 610
 611         list_splice(&tmp, &dsp->used_block_list);
 612         return 0;
 613 }
 614
 615 /* allocate first free DSP blocks for data - callers hold locks */
 616 static int block_alloc(struct sst_dsp *dsp, struct sst_block_allocator *ba,
 617         struct list_head *block_list)
 618 {
 619         struct sst_mem_block *block, *tmp;
 620         int ret = 0;
 621
 622         if (ba->size == 0)
 623                 return 0;
 624
 625         /* find first free whole blocks that can hold module */
 626         list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
 627
 628                 /* ignore blocks with wrong type */
 629                 if (block->type != ba->type)
 630                         continue;
 631
 632                 if (ba->size > block->size)
 633                         continue;
 634
 635                 ba->offset = block->offset;
 636                 block->bytes_used = ba->size % block->size;
 637                 list_add(&block->module_list, block_list);
 638                 list_move(&block->list, &dsp->used_block_list);
 639                 dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
 640                         block->type, block->index, block->offset);
 641                 return 0;
 642         }
 643
 644         /* then find free multiple blocks that can hold module */
 645         list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
 646
 647                 /* ignore blocks with wrong type */
 648                 if (block->type != ba->type)
 649                         continue;
 650
 651                 /* do we span > 1 blocks */
 652                 if (ba->size > block->size) {
 653
 654                         /* align ba to block boundary */
 655                         ba->offset = block->offset;
 656
 657                         ret = block_alloc_contiguous(dsp, ba, block_list);
 658                         if (ret == 0)
 659                                 return ret;
 660
 661                 }
 662         }
 663
 664         /* not enough free block space */
 665         return -ENOMEM;
 666 }
 667
 668 int sst_alloc_blocks(struct sst_dsp *dsp, struct sst_block_allocator *ba,
 669         struct list_head *block_list)
 670 {
 671         int ret;
 672
 673         dev_dbg(dsp->dev, "block request 0x%x bytes at offset 0x%x type %d\n",
 674                 ba->size, ba->offset, ba->type);
 675
 676         mutex_lock(&dsp->mutex);
 677
 678         ret = block_alloc(dsp, ba, block_list);
 679         if (ret < 0) {
 680                 dev_err(dsp->dev, "error: can't alloc blocks %d\n", ret);
 681                 goto out;
 682         }
 683
 684         /* prepare DSP blocks for module usage */
 685         ret = block_list_prepare(dsp, block_list);
 686         if (ret < 0)
 687                 dev_err(dsp->dev, "error: prepare failed\n");
 688
 689 out:
 690         mutex_unlock(&dsp->mutex);
 691         return ret;
 692 }
 693 EXPORT_SYMBOL_GPL(sst_alloc_blocks);
 694
 695 int sst_free_blocks(struct sst_dsp *dsp, struct list_head *block_list)
 696 {
 697         mutex_lock(&dsp->mutex);
 698         block_list_remove(dsp, block_list);
 699         mutex_unlock(&dsp->mutex);
 700         return 0;
 701 }
 702 EXPORT_SYMBOL_GPL(sst_free_blocks);
 703
 704 /* allocate memory blocks for static module addresses - callers hold locks */
 705 static int block_alloc_fixed(struct sst_dsp *dsp, struct sst_block_allocator *ba,
 706         struct list_head *block_list)
 707 {
 708         struct sst_mem_block *block, *tmp;
 709         u32 end = ba->offset + ba->size, block_end;
 710         int err;
 711
 712         /* only IRAM/DRAM blocks are managed */
 713         if (ba->type != SST_MEM_IRAM && ba->type != SST_MEM_DRAM)
 714                 return 0;
 715
 716         /* are blocks already attached to this module */
 717         list_for_each_entry_safe(block, tmp, block_list, module_list) {
 718
 719                 /* ignore blocks with wrong type */
 720                 if (block->type != ba->type)
 721                         continue;
 722
 723                 block_end = block->offset + block->size;
 724
 725                 /* find block that holds section */
 726                 if (ba->offset >= block->offset && end <= block_end)
 727                         return 0;
 728
 729                 /* does block span more than 1 section */
 730                 if (ba->offset >= block->offset && ba->offset < block_end) {
 731
 732                         /* align ba to block boundary */
 733                         ba->size -= block_end - ba->offset;
 734                         ba->offset = block_end;
 735                         err = block_alloc_contiguous(dsp, ba, block_list);
 736                         if (err < 0)
 737                                 return -ENOMEM;
 738
 739                         /* module already owns blocks */
 740                         return 0;
 741                 }
 742         }
 743
 744         /* find first free blocks that can hold section in free list */
 745         list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
 746                 block_end = block->offset + block->size;
 747
 748                 /* ignore blocks with wrong type */
 749                 if (block->type != ba->type)
 750                         continue;
 751
 752                 /* find block that holds section */
 753                 if (ba->offset >= block->offset && end <= block_end) {
 754
 755                         /* add block */
 756                         list_move(&block->list, &dsp->used_block_list);
 757                         list_add(&block->module_list, block_list);
 758                         dev_dbg(dsp->dev, "block allocated %d:%d at offset 0x%x\n",
 759                                 block->type, block->index, block->offset);
 760                         return 0;
 761                 }
 762
 763                 /* does block span more than 1 section */
 764                 if (ba->offset >= block->offset && ba->offset < block_end) {
 765
 766                         /* align ba to block boundary */
 767                         ba->offset = block->offset;
 768
 769                         err = block_alloc_contiguous(dsp, ba, block_list);
 770                         if (err < 0)
 771                                 return -ENOMEM;
 772
 773                         return 0;
 774                 }
 775         }
 776
 777         return -ENOMEM;
 778 }
 779
 780 /* Load fixed module data into DSP memory blocks */
 781 int sst_module_alloc_blocks(struct sst_module *module)
 782 {
 783         struct sst_dsp *dsp = module->dsp;
 784         struct sst_fw *sst_fw = module->sst_fw;
 785         struct sst_block_allocator ba;
 786         int ret;
 787
 788         ba.size = module->size;
 789         ba.type = module->type;
 790         ba.offset = module->offset;
 791
 792         dev_dbg(dsp->dev, "block request 0x%x bytes at offset 0x%x type %d\n",
 793                 ba.size, ba.offset, ba.type);
 794
 795         mutex_lock(&dsp->mutex);
 796
 797         /* alloc blocks that includes this section */
 798         ret = block_alloc_fixed(dsp, &ba, &module->block_list);
 799         if (ret < 0) {
 800                 dev_err(dsp->dev,
 801                         "error: no free blocks for section at offset 0x%x size 0x%x\n",
 802                         module->offset, module->size);
 803                 mutex_unlock(&dsp->mutex);
 804                 return -ENOMEM;
 805         }
 806
 807         /* prepare DSP blocks for module copy */
 808         ret = block_list_prepare(dsp, &module->block_list);
 809         if (ret < 0) {
 810                 dev_err(dsp->dev, "error: fw module prepare failed\n");
 811                 goto err;
 812         }
 813
 814         /* copy partial module data to blocks */
 815         if (dsp->fw_use_dma) {
 816                 ret = sst_dsp_dma_copyto(dsp,
 817                         dsp->addr.lpe_base + module->offset,
 818                         sst_fw->dmable_fw_paddr + module->data_offset,
 819                         module->size);
 820                 if (ret < 0) {
 821                         dev_err(dsp->dev, "error: module copy failed\n");
 822                         goto err;
 823                 }
 824         } else
 825                 sst_memcpy32(dsp->addr.lpe + module->offset, module->data,
 826                         module->size);
 827
 828         mutex_unlock(&dsp->mutex);
 829         return ret;
 830
 831 err:
 832         block_list_remove(dsp, &module->block_list);
 833         mutex_unlock(&dsp->mutex);
 834         return ret;
 835 }
 836 EXPORT_SYMBOL_GPL(sst_module_alloc_blocks);
 837
 838 /* Unload entire module from DSP memory */
 839 int sst_module_free_blocks(struct sst_module *module)
 840 {
 841         struct sst_dsp *dsp = module->dsp;
 842
 843         mutex_lock(&dsp->mutex);
 844         block_list_remove(dsp, &module->block_list);
 845         mutex_unlock(&dsp->mutex);
 846         return 0;
 847 }
 848 EXPORT_SYMBOL_GPL(sst_module_free_blocks);
 849
 850 int sst_module_runtime_alloc_blocks(struct sst_module_runtime *runtime,
 851         int offset)
 852 {
 853         struct sst_dsp *dsp = runtime->dsp;
 854         struct sst_module *module = runtime->module;
 855         struct sst_block_allocator ba;
 856         int ret;
 857
 858         if (module->persistent_size == 0)
 859                 return 0;
 860
 861         ba.size = module->persistent_size;
 862         ba.type = SST_MEM_DRAM;
 863
 864         mutex_lock(&dsp->mutex);
 865
 866         /* do we need to allocate at a fixed address ? */
 867         if (offset != 0) {
 868
 869                 ba.offset = offset;
 870
 871                 dev_dbg(dsp->dev, "persistent fixed block request 0x%x bytes type %d offset 0x%x\n",
 872                         ba.size, ba.type, ba.offset);
 873
 874                 /* alloc blocks that includes this section */
 875                 ret = block_alloc_fixed(dsp, &ba, &runtime->block_list);
 876
 877         } else {
 878                 dev_dbg(dsp->dev, "persistent block request 0x%x bytes type %d\n",
 879                         ba.size, ba.type);
 880
 881                 /* alloc blocks that includes this section */
 882                 ret = block_alloc(dsp, &ba, &runtime->block_list);
 883         }
 884         if (ret < 0) {
 885                 dev_err(dsp->dev,
 886                 "error: no free blocks for runtime module size 0x%x\n",
 887                         module->persistent_size);
 888                 mutex_unlock(&dsp->mutex);
 889                 return -ENOMEM;
 890         }
 891         runtime->persistent_offset = ba.offset;
 892
 893         /* prepare DSP blocks for module copy */
 894         ret = block_list_prepare(dsp, &runtime->block_list);
 895         if (ret < 0) {
 896                 dev_err(dsp->dev, "error: runtime block prepare failed\n");
 897                 goto err;
 898         }
 899
 900         mutex_unlock(&dsp->mutex);
 901         return ret;
 902
 903 err:
 904         block_list_remove(dsp, &module->block_list);
 905         mutex_unlock(&dsp->mutex);
 906         return ret;
 907 }
 908 EXPORT_SYMBOL_GPL(sst_module_runtime_alloc_blocks);
 909
 910 int sst_module_runtime_free_blocks(struct sst_module_runtime *runtime)
 911 {
 912         struct sst_dsp *dsp = runtime->dsp;
 913
 914         mutex_lock(&dsp->mutex);
 915         block_list_remove(dsp, &runtime->block_list);
 916         mutex_unlock(&dsp->mutex);
 917         return 0;
 918 }
 919 EXPORT_SYMBOL_GPL(sst_module_runtime_free_blocks);
 920
 921 int sst_module_runtime_save(struct sst_module_runtime *runtime,
 922         struct sst_module_runtime_context *context)
 923 {
 924         struct sst_dsp *dsp = runtime->dsp;
 925         struct sst_module *module = runtime->module;
 926         int ret = 0;
 927
 928         dev_dbg(dsp->dev, "saving runtime %d memory at 0x%x size 0x%x\n",
 929                 runtime->id, runtime->persistent_offset,
 930                 module->persistent_size);
 931
 932         context->buffer = dma_alloc_coherent(dsp->dma_dev,
 933                 module->persistent_size,
 934                 &context->dma_buffer, GFP_DMA | GFP_KERNEL);
 935         if (!context->buffer) {
 936                 dev_err(dsp->dev, "error: DMA context alloc failed\n");
 937                 return -ENOMEM;
 938         }
 939
 940         mutex_lock(&dsp->mutex);
 941
 942         if (dsp->fw_use_dma) {
 943
 944                 ret = sst_dsp_dma_get_channel(dsp, 0);
 945                 if (ret < 0)
 946                         goto err;
 947
 948                 ret = sst_dsp_dma_copyfrom(dsp, context->dma_buffer,
 949                         dsp->addr.lpe_base + runtime->persistent_offset,
 950                         module->persistent_size);
 951                 sst_dsp_dma_put_channel(dsp);
 952                 if (ret < 0) {
 953                         dev_err(dsp->dev, "error: context copy failed\n");
 954                         goto err;
 955                 }
 956         } else
 957                 sst_memcpy32(context->buffer, dsp->addr.lpe +
 958                         runtime->persistent_offset,
 959                         module->persistent_size);
 960
 961 err:
 962         mutex_unlock(&dsp->mutex);
 963         return ret;
 964 }
 965 EXPORT_SYMBOL_GPL(sst_module_runtime_save);
 966
 967 int sst_module_runtime_restore(struct sst_module_runtime *runtime,
 968         struct sst_module_runtime_context *context)
 969 {
 970         struct sst_dsp *dsp = runtime->dsp;
 971         struct sst_module *module = runtime->module;
 972         int ret = 0;
 973
 974         dev_dbg(dsp->dev, "restoring runtime %d memory at 0x%x size 0x%x\n",
 975                 runtime->id, runtime->persistent_offset,
 976                 module->persistent_size);
 977
 978         mutex_lock(&dsp->mutex);
 979
 980         if (!context->buffer) {
 981                 dev_info(dsp->dev, "no context buffer need to restore!\n");
 982                 goto err;
 983         }
 984
 985         if (dsp->fw_use_dma) {
 986
 987                 ret = sst_dsp_dma_get_channel(dsp, 0);
 988                 if (ret < 0)
 989                         goto err;
 990
 991                 ret = sst_dsp_dma_copyto(dsp,
 992                         dsp->addr.lpe_base + runtime->persistent_offset,
 993                         context->dma_buffer, module->persistent_size);
 994                 sst_dsp_dma_put_channel(dsp);
 995                 if (ret < 0) {
 996                         dev_err(dsp->dev, "error: module copy failed\n");
 997                         goto err;
 998                 }
 999         } else
1000                 sst_memcpy32(dsp->addr.lpe + runtime->persistent_offset,
1001                         context->buffer, module->persistent_size);
1002
1003         dma_free_coherent(dsp->dma_dev, module->persistent_size,
1004                                 context->buffer, context->dma_buffer);
1005         context->buffer = NULL;
1006
1007 err:
1008         mutex_unlock(&dsp->mutex);
1009         return ret;
1010 }
1011 EXPORT_SYMBOL_GPL(sst_module_runtime_restore);
1012
1013 /* register a DSP memory block for use with FW based modules */
1014 struct sst_mem_block *sst_mem_block_register(struct sst_dsp *dsp, u32 offset,
1015         u32 size, enum sst_mem_type type, struct sst_block_ops *ops, u32 index,
1016         void *private)
1017 {
1018         struct sst_mem_block *block;
1019
1020         block = kzalloc(sizeof(*block), GFP_KERNEL);
1021         if (block == NULL)
1022                 return NULL;
1023
1024         block->offset = offset;
1025         block->size = size;
1026         block->index = index;
1027         block->type = type;
1028         block->dsp = dsp;
1029         block->private = private;
1030         block->ops = ops;
1031
1032         mutex_lock(&dsp->mutex);
1033         list_add(&block->list, &dsp->free_block_list);
1034         mutex_unlock(&dsp->mutex);
1035
1036         return block;
1037 }
1038 EXPORT_SYMBOL_GPL(sst_mem_block_register);
1039
1040 /* unregister all DSP memory blocks */
1041 void sst_mem_block_unregister_all(struct sst_dsp *dsp)
1042 {
1043         struct sst_mem_block *block, *tmp;
1044
1045         mutex_lock(&dsp->mutex);
1046
1047         /* unregister used blocks */
1048         list_for_each_entry_safe(block, tmp, &dsp->used_block_list, list) {
1049                 list_del(&block->list);
1050                 kfree(block);
1051         }
1052
1053         /* unregister free blocks */
1054         list_for_each_entry_safe(block, tmp, &dsp->free_block_list, list) {
1055                 list_del(&block->list);
1056                 kfree(block);
1057         }
1058
1059         mutex_unlock(&dsp->mutex);
1060 }
1061 EXPORT_SYMBOL_GPL(sst_mem_block_unregister_all);
1062
1063 /* allocate scratch buffer blocks */
1064 int sst_block_alloc_scratch(struct sst_dsp *dsp)
1065 {
1066         struct sst_module *module;
1067         struct sst_block_allocator ba;
1068         int ret;
1069
1070         mutex_lock(&dsp->mutex);
1071
1072         /* calculate required scratch size */
1073         dsp->scratch_size = 0;
1074         list_for_each_entry(module, &dsp->module_list, list) {
1075                 dev_dbg(dsp->dev, "module %d scratch req 0x%x bytes\n",
1076                         module->id, module->scratch_size);
1077                 if (dsp->scratch_size < module->scratch_size)
1078                         dsp->scratch_size = module->scratch_size;
1079         }
1080
1081         dev_dbg(dsp->dev, "scratch buffer required is 0x%x bytes\n",
1082                 dsp->scratch_size);
1083
1084         if (dsp->scratch_size == 0) {
1085                 dev_info(dsp->dev, "no modules need scratch buffer\n");
1086                 mutex_unlock(&dsp->mutex);
1087                 return 0;
1088         }
1089
1090         /* allocate blocks for module scratch buffers */
1091         dev_dbg(dsp->dev, "allocating scratch blocks\n");
1092
1093         ba.size = dsp->scratch_size;
1094         ba.type = SST_MEM_DRAM;
1095
1096         /* do we need to allocate at fixed offset */
1097         if (dsp->scratch_offset != 0) {
1098
1099                 dev_dbg(dsp->dev, "block request 0x%x bytes type %d at 0x%x\n",
1100                         ba.size, ba.type, ba.offset);
1101
1102                 ba.offset = dsp->scratch_offset;
1103
1104                 /* alloc blocks that includes this section */
1105                 ret = block_alloc_fixed(dsp, &ba, &dsp->scratch_block_list);
1106
1107         } else {
1108                 dev_dbg(dsp->dev, "block request 0x%x bytes type %d\n",
1109                         ba.size, ba.type);
1110
1111                 ba.offset = 0;
1112                 ret = block_alloc(dsp, &ba, &dsp->scratch_block_list);
1113         }
1114         if (ret < 0) {
1115                 dev_err(dsp->dev, "error: can't alloc scratch blocks\n");
1116                 mutex_unlock(&dsp->mutex);
1117                 return ret;
1118         }
1119
1120         ret = block_list_prepare(dsp, &dsp->scratch_block_list);
1121         if (ret < 0) {
1122                 dev_err(dsp->dev, "error: scratch block prepare failed\n");
1123                 mutex_unlock(&dsp->mutex);
1124                 return ret;
1125         }
1126
1127         /* assign the same offset of scratch to each module */
1128         dsp->scratch_offset = ba.offset;
1129         mutex_unlock(&dsp->mutex);
1130         return dsp->scratch_size;
1131 }
1132 EXPORT_SYMBOL_GPL(sst_block_alloc_scratch);
1133
1134 /* free all scratch blocks */
1135 void sst_block_free_scratch(struct sst_dsp *dsp)
1136 {
1137         mutex_lock(&dsp->mutex);
1138         block_list_remove(dsp, &dsp->scratch_block_list);
1139         mutex_unlock(&dsp->mutex);
1140 }
1141 EXPORT_SYMBOL_GPL(sst_block_free_scratch);
1142
1143 /* get a module from it's unique ID */
1144 struct sst_module *sst_module_get_from_id(struct sst_dsp *dsp, u32 id)
1145 {
1146         struct sst_module *module;
1147
1148         mutex_lock(&dsp->mutex);
1149
1150         list_for_each_entry(module, &dsp->module_list, list) {
1151                 if (module->id == id) {
1152                         mutex_unlock(&dsp->mutex);
1153                         return module;
1154                 }
1155         }
1156
1157         mutex_unlock(&dsp->mutex);
1158         return NULL;
1159 }
1160 EXPORT_SYMBOL_GPL(sst_module_get_from_id);
1161
1162 struct sst_module_runtime *sst_module_runtime_get_from_id(
1163         struct sst_module *module, u32 id)
1164 {
1165         struct sst_module_runtime *runtime;
1166         struct sst_dsp *dsp = module->dsp;
1167
1168         mutex_lock(&dsp->mutex);
1169
1170         list_for_each_entry(runtime, &module->runtime_list, list) {
1171                 if (runtime->id == id) {
1172                         mutex_unlock(&dsp->mutex);
1173                         return runtime;
1174                 }
1175         }
1176
1177         mutex_unlock(&dsp->mutex);
1178         return NULL;
1179 }
1180 EXPORT_SYMBOL_GPL(sst_module_runtime_get_from_id);
1181
1182 /* returns block address in DSP address space */
1183 u32 sst_dsp_get_offset(struct sst_dsp *dsp, u32 offset,
1184         enum sst_mem_type type)
1185 {
1186         switch (type) {
1187         case SST_MEM_IRAM:
1188                 return offset - dsp->addr.iram_offset +
1189                         dsp->addr.dsp_iram_offset;
1190         case SST_MEM_DRAM:
1191                 return offset - dsp->addr.dram_offset +
1192                         dsp->addr.dsp_dram_offset;
1193         default:
1194                 return 0;
1195         }
1196 }
1197 EXPORT_SYMBOL_GPL(sst_dsp_get_offset);