drivers/gpu/drm/exynos/exynos_drm_ipp.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics Co.Ltd
   3  * Authors:
   4  *      Eunchul Kim <chulspro.kim@samsung.com>
   5  *      Jinyoung Jeon <jy0.jeon@samsung.com>
   6  *      Sangmin Lee <lsmin.lee@samsung.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  *
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/types.h>
  17 #include <linux/clk.h>
  18 #include <linux/pm_runtime.h>
  19
  20 #include <drm/drmP.h>
  21 #include <drm/exynos_drm.h>
  22 #include "exynos_drm_drv.h"
  23 #include "exynos_drm_gem.h"
  24 #include "exynos_drm_ipp.h"
  25 #include "exynos_drm_iommu.h"
  26
  27 /*
  28  * IPP stands for Image Post Processing and
  29  * supports image scaler/rotator and input/output DMA operations.
  30  * using FIMC, GSC, Rotator, so on.
  31  * IPP is integration device driver of same attribute h/w
  32  */
  33
  34 /*
  35  * TODO
  36  * 1. expand command control id.
  37  * 2. integrate property and config.
  38  * 3. removed send_event id check routine.
  39  * 4. compare send_event id if needed.
  40  * 5. free subdrv_remove notifier callback list if needed.
  41  * 6. need to check subdrv_open about multi-open.
  42  * 7. need to power_on implement power and sysmmu ctrl.
  43  */
  44
  45 #define get_ipp_context(dev)    platform_get_drvdata(to_platform_device(dev))
  46 #define ipp_is_m2m_cmd(c)       (c == IPP_CMD_M2M)
  47
  48 /* platform device pointer for ipp device. */
  49 static struct platform_device *exynos_drm_ipp_pdev;
  50
  51 /*
  52  * A structure of event.
  53  *
  54  * @base: base of event.
  55  * @event: ipp event.
  56  */
  57 struct drm_exynos_ipp_send_event {
  58         struct drm_pending_event        base;
  59         struct drm_exynos_ipp_event     event;
  60 };
  61
  62 /*
  63  * A structure of memory node.
  64  *
  65  * @list: list head to memory queue information.
  66  * @ops_id: id of operations.
  67  * @prop_id: id of property.
  68  * @buf_id: id of buffer.
  69  * @buf_info: gem objects and dma address, size.
  70  * @filp: a pointer to drm_file.
  71  */
  72 struct drm_exynos_ipp_mem_node {
  73         struct list_head        list;
  74         enum drm_exynos_ops_id  ops_id;
  75         u32     prop_id;
  76         u32     buf_id;
  77         struct drm_exynos_ipp_buf_info  buf_info;
  78 };
  79
  80 /*
  81  * A structure of ipp context.
  82  *
  83  * @subdrv: prepare initialization using subdrv.
  84  * @ipp_lock: lock for synchronization of access to ipp_idr.
  85  * @prop_lock: lock for synchronization of access to prop_idr.
  86  * @ipp_idr: ipp driver idr.
  87  * @prop_idr: property idr.
  88  * @event_workq: event work queue.
  89  * @cmd_workq: command work queue.
  90  */
  91 struct ipp_context {
  92         struct exynos_drm_subdrv        subdrv;
  93         struct mutex    ipp_lock;
  94         struct mutex    prop_lock;
  95         struct idr      ipp_idr;
  96         struct idr      prop_idr;
  97         struct workqueue_struct *event_workq;
  98         struct workqueue_struct *cmd_workq;
  99 };
 100
 101 static LIST_HEAD(exynos_drm_ippdrv_list);
 102 static DEFINE_MUTEX(exynos_drm_ippdrv_lock);
 103 static BLOCKING_NOTIFIER_HEAD(exynos_drm_ippnb_list);
 104
 105 int exynos_platform_device_ipp_register(void)
 106 {
 107         struct platform_device *pdev;
 108
 109         if (exynos_drm_ipp_pdev)
 110                 return -EEXIST;
 111
 112         pdev = platform_device_register_simple("exynos-drm-ipp", -1, NULL, 0);
 113         if (IS_ERR(pdev))
 114                 return PTR_ERR(pdev);
 115
 116         exynos_drm_ipp_pdev = pdev;
 117
 118         return 0;
 119 }
 120
 121 void exynos_platform_device_ipp_unregister(void)
 122 {
 123         if (exynos_drm_ipp_pdev) {
 124                 platform_device_unregister(exynos_drm_ipp_pdev);
 125                 exynos_drm_ipp_pdev = NULL;
 126         }
 127 }
 128
 129 int exynos_drm_ippdrv_register(struct exynos_drm_ippdrv *ippdrv)
 130 {
 131         mutex_lock(&exynos_drm_ippdrv_lock);
 132         list_add_tail(&ippdrv->drv_list, &exynos_drm_ippdrv_list);
 133         mutex_unlock(&exynos_drm_ippdrv_lock);
 134
 135         return 0;
 136 }
 137
 138 int exynos_drm_ippdrv_unregister(struct exynos_drm_ippdrv *ippdrv)
 139 {
 140         mutex_lock(&exynos_drm_ippdrv_lock);
 141         list_del(&ippdrv->drv_list);
 142         mutex_unlock(&exynos_drm_ippdrv_lock);
 143
 144         return 0;
 145 }
 146
 147 static int ipp_create_id(struct idr *id_idr, struct mutex *lock, void *obj)
 148 {
 149         int ret;
 150
 151         mutex_lock(lock);
 152         ret = idr_alloc(id_idr, obj, 1, 0, GFP_KERNEL);
 153         mutex_unlock(lock);
 154
 155         return ret;
 156 }
 157
 158 static void ipp_remove_id(struct idr *id_idr, struct mutex *lock, u32 id)
 159 {
 160         mutex_lock(lock);
 161         idr_remove(id_idr, id);
 162         mutex_unlock(lock);
 163 }
 164
 165 static void *ipp_find_obj(struct idr *id_idr, struct mutex *lock, u32 id)
 166 {
 167         void *obj;
 168
 169         mutex_lock(lock);
 170         obj = idr_find(id_idr, id);
 171         mutex_unlock(lock);
 172
 173         return obj;
 174 }
 175
 176 static int ipp_check_driver(struct exynos_drm_ippdrv *ippdrv,
 177                             struct drm_exynos_ipp_property *property)
 178 {
 179         if (ippdrv->dedicated || (!ipp_is_m2m_cmd(property->cmd) &&
 180                                   !pm_runtime_suspended(ippdrv->dev)))
 181                 return -EBUSY;
 182
 183         if (ippdrv->check_property &&
 184             ippdrv->check_property(ippdrv->dev, property))
 185                 return -EINVAL;
 186
 187         return 0;
 188 }
 189
 190 static struct exynos_drm_ippdrv *ipp_find_driver(struct ipp_context *ctx,
 191                 struct drm_exynos_ipp_property *property)
 192 {
 193         struct exynos_drm_ippdrv *ippdrv;
 194         u32 ipp_id = property->ipp_id;
 195         int ret;
 196
 197         if (ipp_id) {
 198                 ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock, ipp_id);
 199                 if (!ippdrv) {
 200                         DRM_DEBUG("ipp%d driver not found\n", ipp_id);
 201                         return ERR_PTR(-ENODEV);
 202                 }
 203
 204                 ret = ipp_check_driver(ippdrv, property);
 205                 if (ret < 0) {
 206                         DRM_DEBUG("ipp%d driver check error %d\n", ipp_id, ret);
 207                         return ERR_PTR(ret);
 208                 }
 209
 210                 return ippdrv;
 211         } else {
 212                 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
 213                         ret = ipp_check_driver(ippdrv, property);
 214                         if (ret == 0)
 215                                 return ippdrv;
 216                 }
 217
 218                 DRM_DEBUG("cannot find driver suitable for given property.\n");
 219         }
 220
 221         return ERR_PTR(-ENODEV);
 222 }
 223
 224 static struct exynos_drm_ippdrv *ipp_find_drv_by_handle(u32 prop_id)
 225 {
 226         struct exynos_drm_ippdrv *ippdrv;
 227         struct drm_exynos_ipp_cmd_node *c_node;
 228         int count = 0;
 229
 230         DRM_DEBUG_KMS("prop_id[%d]\n", prop_id);
 231
 232         /*
 233          * This case is search ipp driver by prop_id handle.
 234          * sometimes, ipp subsystem find driver by prop_id.
 235          * e.g PAUSE state, queue buf, command control.
 236          */
 237         list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
 238                 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n", count++, (int)ippdrv);
 239
 240                 mutex_lock(&ippdrv->cmd_lock);
 241                 list_for_each_entry(c_node, &ippdrv->cmd_list, list) {
 242                         if (c_node->property.prop_id == prop_id) {
 243                                 mutex_unlock(&ippdrv->cmd_lock);
 244                                 return ippdrv;
 245                         }
 246                 }
 247                 mutex_unlock(&ippdrv->cmd_lock);
 248         }
 249
 250         return ERR_PTR(-ENODEV);
 251 }
 252
 253 int exynos_drm_ipp_get_property(struct drm_device *drm_dev, void *data,
 254                 struct drm_file *file)
 255 {
 256         struct drm_exynos_file_private *file_priv = file->driver_priv;
 257         struct device *dev = file_priv->ipp_dev;
 258         struct ipp_context *ctx = get_ipp_context(dev);
 259         struct drm_exynos_ipp_prop_list *prop_list = data;
 260         struct exynos_drm_ippdrv *ippdrv;
 261         int count = 0;
 262
 263         if (!ctx) {
 264                 DRM_ERROR("invalid context.\n");
 265                 return -EINVAL;
 266         }
 267
 268         if (!prop_list) {
 269                 DRM_ERROR("invalid property parameter.\n");
 270                 return -EINVAL;
 271         }
 272
 273         DRM_DEBUG_KMS("ipp_id[%d]\n", prop_list->ipp_id);
 274
 275         if (!prop_list->ipp_id) {
 276                 list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list)
 277                         count++;
 278
 279                 /*
 280                  * Supports ippdrv list count for user application.
 281                  * First step user application getting ippdrv count.
 282                  * and second step getting ippdrv capability using ipp_id.
 283                  */
 284                 prop_list->count = count;
 285         } else {
 286                 /*
 287                  * Getting ippdrv capability by ipp_id.
 288                  * some device not supported wb, output interface.
 289                  * so, user application detect correct ipp driver
 290                  * using this ioctl.
 291                  */
 292                 ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock,
 293                                                 prop_list->ipp_id);
 294                 if (!ippdrv) {
 295                         DRM_ERROR("not found ipp%d driver.\n",
 296                                         prop_list->ipp_id);
 297                         return -ENODEV;
 298                 }
 299
 300                 *prop_list = ippdrv->prop_list;
 301         }
 302
 303         return 0;
 304 }
 305
 306 static void ipp_print_property(struct drm_exynos_ipp_property *property,
 307                 int idx)
 308 {
 309         struct drm_exynos_ipp_config *config = &property->config[idx];
 310         struct drm_exynos_pos *pos = &config->pos;
 311         struct drm_exynos_sz *sz = &config->sz;
 312
 313         DRM_DEBUG_KMS("prop_id[%d]ops[%s]fmt[0x%x]\n",
 314                 property->prop_id, idx ? "dst" : "src", config->fmt);
 315
 316         DRM_DEBUG_KMS("pos[%d %d %d %d]sz[%d %d]f[%d]r[%d]\n",
 317                 pos->x, pos->y, pos->w, pos->h,
 318                 sz->hsize, sz->vsize, config->flip, config->degree);
 319 }
 320
 321 static struct drm_exynos_ipp_cmd_work *ipp_create_cmd_work(void)
 322 {
 323         struct drm_exynos_ipp_cmd_work *cmd_work;
 324
 325         cmd_work = kzalloc(sizeof(*cmd_work), GFP_KERNEL);
 326         if (!cmd_work)
 327                 return ERR_PTR(-ENOMEM);
 328
 329         INIT_WORK((struct work_struct *)cmd_work, ipp_sched_cmd);
 330
 331         return cmd_work;
 332 }
 333
 334 static struct drm_exynos_ipp_event_work *ipp_create_event_work(void)
 335 {
 336         struct drm_exynos_ipp_event_work *event_work;
 337
 338         event_work = kzalloc(sizeof(*event_work), GFP_KERNEL);
 339         if (!event_work)
 340                 return ERR_PTR(-ENOMEM);
 341
 342         INIT_WORK(&event_work->work, ipp_sched_event);
 343
 344         return event_work;
 345 }
 346
 347 int exynos_drm_ipp_set_property(struct drm_device *drm_dev, void *data,
 348                 struct drm_file *file)
 349 {
 350         struct drm_exynos_file_private *file_priv = file->driver_priv;
 351         struct device *dev = file_priv->ipp_dev;
 352         struct ipp_context *ctx = get_ipp_context(dev);
 353         struct drm_exynos_ipp_property *property = data;
 354         struct exynos_drm_ippdrv *ippdrv;
 355         struct drm_exynos_ipp_cmd_node *c_node;
 356         u32 prop_id;
 357         int ret, i;
 358
 359         if (!ctx) {
 360                 DRM_ERROR("invalid context.\n");
 361                 return -EINVAL;
 362         }
 363
 364         if (!property) {
 365                 DRM_ERROR("invalid property parameter.\n");
 366                 return -EINVAL;
 367         }
 368
 369         prop_id = property->prop_id;
 370
 371         /*
 372          * This is log print for user application property.
 373          * user application set various property.
 374          */
 375         for_each_ipp_ops(i)
 376                 ipp_print_property(property, i);
 377
 378         /*
 379          * In case prop_id is not zero try to set existing property.
 380          */
 381         if (prop_id) {
 382                 c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock, prop_id);
 383
 384                 if (!c_node || c_node->filp != file) {
 385                         DRM_DEBUG_KMS("prop_id[%d] not found\n", prop_id);
 386                         return -EINVAL;
 387                 }
 388
 389                 if (c_node->state != IPP_STATE_STOP) {
 390                         DRM_DEBUG_KMS("prop_id[%d] not stopped\n", prop_id);
 391                         return -EINVAL;
 392                 }
 393
 394                 c_node->property = *property;
 395
 396                 return 0;
 397         }
 398
 399         /* find ipp driver using ipp id */
 400         ippdrv = ipp_find_driver(ctx, property);
 401         if (IS_ERR(ippdrv)) {
 402                 DRM_ERROR("failed to get ipp driver.\n");
 403                 return -EINVAL;
 404         }
 405
 406         /* allocate command node */
 407         c_node = kzalloc(sizeof(*c_node), GFP_KERNEL);
 408         if (!c_node)
 409                 return -ENOMEM;
 410
 411         ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node);
 412         if (ret < 0) {
 413                 DRM_ERROR("failed to create id.\n");
 414                 goto err_clear;
 415         }
 416         property->prop_id = ret;
 417
 418         DRM_DEBUG_KMS("created prop_id[%d]cmd[%d]ippdrv[0x%x]\n",
 419                 property->prop_id, property->cmd, (int)ippdrv);
 420
 421         /* stored property information and ippdrv in private data */
 422         c_node->property = *property;
 423         c_node->state = IPP_STATE_IDLE;
 424         c_node->filp = file;
 425
 426         c_node->start_work = ipp_create_cmd_work();
 427         if (IS_ERR(c_node->start_work)) {
 428                 DRM_ERROR("failed to create start work.\n");
 429                 ret = PTR_ERR(c_node->start_work);
 430                 goto err_remove_id;
 431         }
 432
 433         c_node->stop_work = ipp_create_cmd_work();
 434         if (IS_ERR(c_node->stop_work)) {
 435                 DRM_ERROR("failed to create stop work.\n");
 436                 ret = PTR_ERR(c_node->stop_work);
 437                 goto err_free_start;
 438         }
 439
 440         c_node->event_work = ipp_create_event_work();
 441         if (IS_ERR(c_node->event_work)) {
 442                 DRM_ERROR("failed to create event work.\n");
 443                 ret = PTR_ERR(c_node->event_work);
 444                 goto err_free_stop;
 445         }
 446
 447         mutex_init(&c_node->lock);
 448         mutex_init(&c_node->mem_lock);
 449         mutex_init(&c_node->event_lock);
 450
 451         init_completion(&c_node->start_complete);
 452         init_completion(&c_node->stop_complete);
 453
 454         for_each_ipp_ops(i)
 455                 INIT_LIST_HEAD(&c_node->mem_list[i]);
 456
 457         INIT_LIST_HEAD(&c_node->event_list);
 458         mutex_lock(&ippdrv->cmd_lock);
 459         list_add_tail(&c_node->list, &ippdrv->cmd_list);
 460         mutex_unlock(&ippdrv->cmd_lock);
 461
 462         /* make dedicated state without m2m */
 463         if (!ipp_is_m2m_cmd(property->cmd))
 464                 ippdrv->dedicated = true;
 465
 466         return 0;
 467
 468 err_free_stop:
 469         kfree(c_node->stop_work);
 470 err_free_start:
 471         kfree(c_node->start_work);
 472 err_remove_id:
 473         ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock, property->prop_id);
 474 err_clear:
 475         kfree(c_node);
 476         return ret;
 477 }
 478
 479 static int ipp_put_mem_node(struct drm_device *drm_dev,
 480                 struct drm_exynos_ipp_cmd_node *c_node,
 481                 struct drm_exynos_ipp_mem_node *m_node)
 482 {
 483         int i;
 484
 485         DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
 486
 487         if (!m_node) {
 488                 DRM_ERROR("invalid dequeue node.\n");
 489                 return -EFAULT;
 490         }
 491
 492         DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
 493
 494         /* put gem buffer */
 495         for_each_ipp_planar(i) {
 496                 unsigned long handle = m_node->buf_info.handles[i];
 497                 if (handle)
 498                         exynos_drm_gem_put_dma_addr(drm_dev, handle,
 499                                                         c_node->filp);
 500         }
 501
 502         list_del(&m_node->list);
 503         kfree(m_node);
 504
 505         return 0;
 506 }
 507
 508 static struct drm_exynos_ipp_mem_node
 509                 *ipp_get_mem_node(struct drm_device *drm_dev,
 510                 struct drm_exynos_ipp_cmd_node *c_node,
 511                 struct drm_exynos_ipp_queue_buf *qbuf)
 512 {
 513         struct drm_exynos_ipp_mem_node *m_node;
 514         struct drm_exynos_ipp_buf_info *buf_info;
 515         int i;
 516
 517         m_node = kzalloc(sizeof(*m_node), GFP_KERNEL);
 518         if (!m_node)
 519                 return ERR_PTR(-ENOMEM);
 520
 521         buf_info = &m_node->buf_info;
 522
 523         /* operations, buffer id */
 524         m_node->ops_id = qbuf->ops_id;
 525         m_node->prop_id = qbuf->prop_id;
 526         m_node->buf_id = qbuf->buf_id;
 527         INIT_LIST_HEAD(&m_node->list);
 528
 529         DRM_DEBUG_KMS("m_node[0x%x]ops_id[%d]\n", (int)m_node, qbuf->ops_id);
 530         DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]\n", qbuf->prop_id, m_node->buf_id);
 531
 532         for_each_ipp_planar(i) {
 533                 DRM_DEBUG_KMS("i[%d]handle[0x%x]\n", i, qbuf->handle[i]);
 534
 535                 /* get dma address by handle */
 536                 if (qbuf->handle[i]) {
 537                         dma_addr_t *addr;
 538
 539                         addr = exynos_drm_gem_get_dma_addr(drm_dev,
 540                                         qbuf->handle[i], c_node->filp);
 541                         if (IS_ERR(addr)) {
 542                                 DRM_ERROR("failed to get addr.\n");
 543                                 ipp_put_mem_node(drm_dev, c_node, m_node);
 544                                 return ERR_PTR(-EFAULT);
 545                         }
 546
 547                         buf_info->handles[i] = qbuf->handle[i];
 548                         buf_info->base[i] = *addr;
 549                         DRM_DEBUG_KMS("i[%d]base[0x%x]hd[0x%lx]\n", i,
 550                                       buf_info->base[i], buf_info->handles[i]);
 551                 }
 552         }
 553
 554         mutex_lock(&c_node->mem_lock);
 555         list_add_tail(&m_node->list, &c_node->mem_list[qbuf->ops_id]);
 556         mutex_unlock(&c_node->mem_lock);
 557
 558         return m_node;
 559 }
 560
 561 static void ipp_clean_mem_nodes(struct drm_device *drm_dev,
 562                                struct drm_exynos_ipp_cmd_node *c_node, int ops)
 563 {
 564         struct drm_exynos_ipp_mem_node *m_node, *tm_node;
 565         struct list_head *head = &c_node->mem_list[ops];
 566
 567         mutex_lock(&c_node->mem_lock);
 568
 569         list_for_each_entry_safe(m_node, tm_node, head, list) {
 570                 int ret;
 571
 572                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
 573                 if (ret)
 574                         DRM_ERROR("failed to put m_node.\n");
 575         }
 576
 577         mutex_unlock(&c_node->mem_lock);
 578 }
 579
 580 static void ipp_free_event(struct drm_pending_event *event)
 581 {
 582         kfree(event);
 583 }
 584
 585 static int ipp_get_event(struct drm_device *drm_dev,
 586                 struct drm_exynos_ipp_cmd_node *c_node,
 587                 struct drm_exynos_ipp_queue_buf *qbuf)
 588 {
 589         struct drm_exynos_ipp_send_event *e;
 590         unsigned long flags;
 591
 592         DRM_DEBUG_KMS("ops_id[%d]buf_id[%d]\n", qbuf->ops_id, qbuf->buf_id);
 593
 594         e = kzalloc(sizeof(*e), GFP_KERNEL);
 595         if (!e) {
 596                 spin_lock_irqsave(&drm_dev->event_lock, flags);
 597                 c_node->filp->event_space += sizeof(e->event);
 598                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 599                 return -ENOMEM;
 600         }
 601
 602         /* make event */
 603         e->event.base.type = DRM_EXYNOS_IPP_EVENT;
 604         e->event.base.length = sizeof(e->event);
 605         e->event.user_data = qbuf->user_data;
 606         e->event.prop_id = qbuf->prop_id;
 607         e->event.buf_id[EXYNOS_DRM_OPS_DST] = qbuf->buf_id;
 608         e->base.event = &e->event.base;
 609         e->base.file_priv = c_node->filp;
 610         e->base.destroy = ipp_free_event;
 611         mutex_lock(&c_node->event_lock);
 612         list_add_tail(&e->base.link, &c_node->event_list);
 613         mutex_unlock(&c_node->event_lock);
 614
 615         return 0;
 616 }
 617
 618 static void ipp_put_event(struct drm_exynos_ipp_cmd_node *c_node,
 619                 struct drm_exynos_ipp_queue_buf *qbuf)
 620 {
 621         struct drm_exynos_ipp_send_event *e, *te;
 622         int count = 0;
 623
 624         mutex_lock(&c_node->event_lock);
 625         list_for_each_entry_safe(e, te, &c_node->event_list, base.link) {
 626                 DRM_DEBUG_KMS("count[%d]e[0x%x]\n", count++, (int)e);
 627
 628                 /*
 629                  * qbuf == NULL condition means all event deletion.
 630                  * stop operations want to delete all event list.
 631                  * another case delete only same buf id.
 632                  */
 633                 if (!qbuf) {
 634                         /* delete list */
 635                         list_del(&e->base.link);
 636                         kfree(e);
 637                 }
 638
 639                 /* compare buffer id */
 640                 if (qbuf && (qbuf->buf_id ==
 641                     e->event.buf_id[EXYNOS_DRM_OPS_DST])) {
 642                         /* delete list */
 643                         list_del(&e->base.link);
 644                         kfree(e);
 645                         goto out_unlock;
 646                 }
 647         }
 648
 649 out_unlock:
 650         mutex_unlock(&c_node->event_lock);
 651         return;
 652 }
 653
 654 static void ipp_clean_cmd_node(struct ipp_context *ctx,
 655                                 struct drm_exynos_ipp_cmd_node *c_node)
 656 {
 657         int i;
 658
 659         /* cancel works */
 660         cancel_work_sync(&c_node->start_work->work);
 661         cancel_work_sync(&c_node->stop_work->work);
 662         cancel_work_sync(&c_node->event_work->work);
 663
 664         /* put event */
 665         ipp_put_event(c_node, NULL);
 666
 667         for_each_ipp_ops(i)
 668                 ipp_clean_mem_nodes(ctx->subdrv.drm_dev, c_node, i);
 669
 670         /* delete list */
 671         list_del(&c_node->list);
 672
 673         ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock,
 674                         c_node->property.prop_id);
 675
 676         /* destroy mutex */
 677         mutex_destroy(&c_node->lock);
 678         mutex_destroy(&c_node->mem_lock);
 679         mutex_destroy(&c_node->event_lock);
 680
 681         /* free command node */
 682         kfree(c_node->start_work);
 683         kfree(c_node->stop_work);
 684         kfree(c_node->event_work);
 685         kfree(c_node);
 686 }
 687
 688 static bool ipp_check_mem_list(struct drm_exynos_ipp_cmd_node *c_node)
 689 {
 690         switch (c_node->property.cmd) {
 691         case IPP_CMD_WB:
 692                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
 693         case IPP_CMD_OUTPUT:
 694                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]);
 695         case IPP_CMD_M2M:
 696         default:
 697                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]) &&
 698                        !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
 699         }
 700 }
 701
 702 static struct drm_exynos_ipp_mem_node
 703                 *ipp_find_mem_node(struct drm_exynos_ipp_cmd_node *c_node,
 704                 struct drm_exynos_ipp_queue_buf *qbuf)
 705 {
 706         struct drm_exynos_ipp_mem_node *m_node;
 707         struct list_head *head;
 708         int count = 0;
 709
 710         DRM_DEBUG_KMS("buf_id[%d]\n", qbuf->buf_id);
 711
 712         /* source/destination memory list */
 713         head = &c_node->mem_list[qbuf->ops_id];
 714
 715         /* find memory node from memory list */
 716         list_for_each_entry(m_node, head, list) {
 717                 DRM_DEBUG_KMS("count[%d]m_node[0x%x]\n", count++, (int)m_node);
 718
 719                 /* compare buffer id */
 720                 if (m_node->buf_id == qbuf->buf_id)
 721                         return m_node;
 722         }
 723
 724         return NULL;
 725 }
 726
 727 static int ipp_set_mem_node(struct exynos_drm_ippdrv *ippdrv,
 728                 struct drm_exynos_ipp_cmd_node *c_node,
 729                 struct drm_exynos_ipp_mem_node *m_node)
 730 {
 731         struct exynos_drm_ipp_ops *ops = NULL;
 732         int ret = 0;
 733
 734         DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
 735
 736         if (!m_node) {
 737                 DRM_ERROR("invalid queue node.\n");
 738                 return -EFAULT;
 739         }
 740
 741         DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
 742
 743         /* get operations callback */
 744         ops = ippdrv->ops[m_node->ops_id];
 745         if (!ops) {
 746                 DRM_ERROR("not support ops.\n");
 747                 return -EFAULT;
 748         }
 749
 750         /* set address and enable irq */
 751         if (ops->set_addr) {
 752                 ret = ops->set_addr(ippdrv->dev, &m_node->buf_info,
 753                         m_node->buf_id, IPP_BUF_ENQUEUE);
 754                 if (ret) {
 755                         DRM_ERROR("failed to set addr.\n");
 756                         return ret;
 757                 }
 758         }
 759
 760         return ret;
 761 }
 762
 763 static void ipp_handle_cmd_work(struct device *dev,
 764                 struct exynos_drm_ippdrv *ippdrv,
 765                 struct drm_exynos_ipp_cmd_work *cmd_work,
 766                 struct drm_exynos_ipp_cmd_node *c_node)
 767 {
 768         struct ipp_context *ctx = get_ipp_context(dev);
 769
 770         cmd_work->ippdrv = ippdrv;
 771         cmd_work->c_node = c_node;
 772         queue_work(ctx->cmd_workq, &cmd_work->work);
 773 }
 774
 775 static int ipp_queue_buf_with_run(struct device *dev,
 776                 struct drm_exynos_ipp_cmd_node *c_node,
 777                 struct drm_exynos_ipp_mem_node *m_node,
 778                 struct drm_exynos_ipp_queue_buf *qbuf)
 779 {
 780         struct exynos_drm_ippdrv *ippdrv;
 781         struct drm_exynos_ipp_property *property;
 782         struct exynos_drm_ipp_ops *ops;
 783         int ret;
 784
 785         ippdrv = ipp_find_drv_by_handle(qbuf->prop_id);
 786         if (IS_ERR(ippdrv)) {
 787                 DRM_ERROR("failed to get ipp driver.\n");
 788                 return -EFAULT;
 789         }
 790
 791         ops = ippdrv->ops[qbuf->ops_id];
 792         if (!ops) {
 793                 DRM_ERROR("failed to get ops.\n");
 794                 return -EFAULT;
 795         }
 796
 797         property = &c_node->property;
 798
 799         if (c_node->state != IPP_STATE_START) {
 800                 DRM_DEBUG_KMS("bypass for invalid state.\n");
 801                 return 0;
 802         }
 803
 804         mutex_lock(&c_node->mem_lock);
 805         if (!ipp_check_mem_list(c_node)) {
 806                 mutex_unlock(&c_node->mem_lock);
 807                 DRM_DEBUG_KMS("empty memory.\n");
 808                 return 0;
 809         }
 810
 811         /*
 812          * If set destination buffer and enabled clock,
 813          * then m2m operations need start operations at queue_buf
 814          */
 815         if (ipp_is_m2m_cmd(property->cmd)) {
 816                 struct drm_exynos_ipp_cmd_work *cmd_work = c_node->start_work;
 817
 818                 cmd_work->ctrl = IPP_CTRL_PLAY;
 819                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
 820         } else {
 821                 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
 822                 if (ret) {
 823                         mutex_unlock(&c_node->mem_lock);
 824                         DRM_ERROR("failed to set m node.\n");
 825                         return ret;
 826                 }
 827         }
 828         mutex_unlock(&c_node->mem_lock);
 829
 830         return 0;
 831 }
 832
 833 static void ipp_clean_queue_buf(struct drm_device *drm_dev,
 834                 struct drm_exynos_ipp_cmd_node *c_node,
 835                 struct drm_exynos_ipp_queue_buf *qbuf)
 836 {
 837         struct drm_exynos_ipp_mem_node *m_node, *tm_node;
 838
 839         /* delete list */
 840         mutex_lock(&c_node->mem_lock);
 841         list_for_each_entry_safe(m_node, tm_node,
 842                 &c_node->mem_list[qbuf->ops_id], list) {
 843                 if (m_node->buf_id == qbuf->buf_id &&
 844                     m_node->ops_id == qbuf->ops_id)
 845                         ipp_put_mem_node(drm_dev, c_node, m_node);
 846         }
 847         mutex_unlock(&c_node->mem_lock);
 848 }
 849
 850 int exynos_drm_ipp_queue_buf(struct drm_device *drm_dev, void *data,
 851                 struct drm_file *file)
 852 {
 853         struct drm_exynos_file_private *file_priv = file->driver_priv;
 854         struct device *dev = file_priv->ipp_dev;
 855         struct ipp_context *ctx = get_ipp_context(dev);
 856         struct drm_exynos_ipp_queue_buf *qbuf = data;
 857         struct drm_exynos_ipp_cmd_node *c_node;
 858         struct drm_exynos_ipp_mem_node *m_node;
 859         int ret;
 860
 861         if (!qbuf) {
 862                 DRM_ERROR("invalid buf parameter.\n");
 863                 return -EINVAL;
 864         }
 865
 866         if (qbuf->ops_id >= EXYNOS_DRM_OPS_MAX) {
 867                 DRM_ERROR("invalid ops parameter.\n");
 868                 return -EINVAL;
 869         }
 870
 871         DRM_DEBUG_KMS("prop_id[%d]ops_id[%s]buf_id[%d]buf_type[%d]\n",
 872                 qbuf->prop_id, qbuf->ops_id ? "dst" : "src",
 873                 qbuf->buf_id, qbuf->buf_type);
 874
 875         /* find command node */
 876         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
 877                 qbuf->prop_id);
 878         if (!c_node || c_node->filp != file) {
 879                 DRM_ERROR("failed to get command node.\n");
 880                 return -ENODEV;
 881         }
 882
 883         /* buffer control */
 884         switch (qbuf->buf_type) {
 885         case IPP_BUF_ENQUEUE:
 886                 /* get memory node */
 887                 m_node = ipp_get_mem_node(drm_dev, c_node, qbuf);
 888                 if (IS_ERR(m_node)) {
 889                         DRM_ERROR("failed to get m_node.\n");
 890                         return PTR_ERR(m_node);
 891                 }
 892
 893                 /*
 894                  * first step get event for destination buffer.
 895                  * and second step when M2M case run with destination buffer
 896                  * if needed.
 897                  */
 898                 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST) {
 899                         /* get event for destination buffer */
 900                         ret = ipp_get_event(drm_dev, c_node, qbuf);
 901                         if (ret) {
 902                                 DRM_ERROR("failed to get event.\n");
 903                                 goto err_clean_node;
 904                         }
 905
 906                         /*
 907                          * M2M case run play control for streaming feature.
 908                          * other case set address and waiting.
 909                          */
 910                         ret = ipp_queue_buf_with_run(dev, c_node, m_node, qbuf);
 911                         if (ret) {
 912                                 DRM_ERROR("failed to run command.\n");
 913                                 goto err_clean_node;
 914                         }
 915                 }
 916                 break;
 917         case IPP_BUF_DEQUEUE:
 918                 mutex_lock(&c_node->lock);
 919
 920                 /* put event for destination buffer */
 921                 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST)
 922                         ipp_put_event(c_node, qbuf);
 923
 924                 ipp_clean_queue_buf(drm_dev, c_node, qbuf);
 925
 926                 mutex_unlock(&c_node->lock);
 927                 break;
 928         default:
 929                 DRM_ERROR("invalid buffer control.\n");
 930                 return -EINVAL;
 931         }
 932
 933         return 0;
 934
 935 err_clean_node:
 936         DRM_ERROR("clean memory nodes.\n");
 937
 938         ipp_clean_queue_buf(drm_dev, c_node, qbuf);
 939         return ret;
 940 }
 941
 942 static bool exynos_drm_ipp_check_valid(struct device *dev,
 943                 enum drm_exynos_ipp_ctrl ctrl, enum drm_exynos_ipp_state state)
 944 {
 945         if (ctrl != IPP_CTRL_PLAY) {
 946                 if (pm_runtime_suspended(dev)) {
 947                         DRM_ERROR("pm:runtime_suspended.\n");
 948                         goto err_status;
 949                 }
 950         }
 951
 952         switch (ctrl) {
 953         case IPP_CTRL_PLAY:
 954                 if (state != IPP_STATE_IDLE)
 955                         goto err_status;
 956                 break;
 957         case IPP_CTRL_STOP:
 958                 if (state == IPP_STATE_STOP)
 959                         goto err_status;
 960                 break;
 961         case IPP_CTRL_PAUSE:
 962                 if (state != IPP_STATE_START)
 963                         goto err_status;
 964                 break;
 965         case IPP_CTRL_RESUME:
 966                 if (state != IPP_STATE_STOP)
 967                         goto err_status;
 968                 break;
 969         default:
 970                 DRM_ERROR("invalid state.\n");
 971                 goto err_status;
 972         }
 973
 974         return true;
 975
 976 err_status:
 977         DRM_ERROR("invalid status:ctrl[%d]state[%d]\n", ctrl, state);
 978         return false;
 979 }
 980
 981 int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
 982                 struct drm_file *file)
 983 {
 984         struct drm_exynos_file_private *file_priv = file->driver_priv;
 985         struct exynos_drm_ippdrv *ippdrv = NULL;
 986         struct device *dev = file_priv->ipp_dev;
 987         struct ipp_context *ctx = get_ipp_context(dev);
 988         struct drm_exynos_ipp_cmd_ctrl *cmd_ctrl = data;
 989         struct drm_exynos_ipp_cmd_work *cmd_work;
 990         struct drm_exynos_ipp_cmd_node *c_node;
 991
 992         if (!ctx) {
 993                 DRM_ERROR("invalid context.\n");
 994                 return -EINVAL;
 995         }
 996
 997         if (!cmd_ctrl) {
 998                 DRM_ERROR("invalid control parameter.\n");
 999                 return -EINVAL;
1000         }
1001
1002         DRM_DEBUG_KMS("ctrl[%d]prop_id[%d]\n",
1003                 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1004
1005         ippdrv = ipp_find_drv_by_handle(cmd_ctrl->prop_id);
1006         if (IS_ERR(ippdrv)) {
1007                 DRM_ERROR("failed to get ipp driver.\n");
1008                 return PTR_ERR(ippdrv);
1009         }
1010
1011         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
1012                 cmd_ctrl->prop_id);
1013         if (!c_node || c_node->filp != file) {
1014                 DRM_ERROR("invalid command node list.\n");
1015                 return -ENODEV;
1016         }
1017
1018         if (!exynos_drm_ipp_check_valid(ippdrv->dev, cmd_ctrl->ctrl,
1019             c_node->state)) {
1020                 DRM_ERROR("invalid state.\n");
1021                 return -EINVAL;
1022         }
1023
1024         switch (cmd_ctrl->ctrl) {
1025         case IPP_CTRL_PLAY:
1026                 if (pm_runtime_suspended(ippdrv->dev))
1027                         pm_runtime_get_sync(ippdrv->dev);
1028
1029                 c_node->state = IPP_STATE_START;
1030
1031                 cmd_work = c_node->start_work;
1032                 cmd_work->ctrl = cmd_ctrl->ctrl;
1033                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1034                 break;
1035         case IPP_CTRL_STOP:
1036                 cmd_work = c_node->stop_work;
1037                 cmd_work->ctrl = cmd_ctrl->ctrl;
1038                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1039
1040                 if (!wait_for_completion_timeout(&c_node->stop_complete,
1041                     msecs_to_jiffies(300))) {
1042                         DRM_ERROR("timeout stop:prop_id[%d]\n",
1043                                 c_node->property.prop_id);
1044                 }
1045
1046                 c_node->state = IPP_STATE_STOP;
1047                 ippdrv->dedicated = false;
1048                 mutex_lock(&ippdrv->cmd_lock);
1049                 ipp_clean_cmd_node(ctx, c_node);
1050
1051                 if (list_empty(&ippdrv->cmd_list))
1052                         pm_runtime_put_sync(ippdrv->dev);
1053                 mutex_unlock(&ippdrv->cmd_lock);
1054                 break;
1055         case IPP_CTRL_PAUSE:
1056                 cmd_work = c_node->stop_work;
1057                 cmd_work->ctrl = cmd_ctrl->ctrl;
1058                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1059
1060                 if (!wait_for_completion_timeout(&c_node->stop_complete,
1061                     msecs_to_jiffies(200))) {
1062                         DRM_ERROR("timeout stop:prop_id[%d]\n",
1063                                 c_node->property.prop_id);
1064                 }
1065
1066                 c_node->state = IPP_STATE_STOP;
1067                 break;
1068         case IPP_CTRL_RESUME:
1069                 c_node->state = IPP_STATE_START;
1070                 cmd_work = c_node->start_work;
1071                 cmd_work->ctrl = cmd_ctrl->ctrl;
1072                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1073                 break;
1074         default:
1075                 DRM_ERROR("could not support this state currently.\n");
1076                 return -EINVAL;
1077         }
1078
1079         DRM_DEBUG_KMS("done ctrl[%d]prop_id[%d]\n",
1080                 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1081
1082         return 0;
1083 }
1084
1085 int exynos_drm_ippnb_register(struct notifier_block *nb)
1086 {
1087         return blocking_notifier_chain_register(
1088                 &exynos_drm_ippnb_list, nb);
1089 }
1090
1091 int exynos_drm_ippnb_unregister(struct notifier_block *nb)
1092 {
1093         return blocking_notifier_chain_unregister(
1094                 &exynos_drm_ippnb_list, nb);
1095 }
1096
1097 int exynos_drm_ippnb_send_event(unsigned long val, void *v)
1098 {
1099         return blocking_notifier_call_chain(
1100                 &exynos_drm_ippnb_list, val, v);
1101 }
1102
1103 static int ipp_set_property(struct exynos_drm_ippdrv *ippdrv,
1104                 struct drm_exynos_ipp_property *property)
1105 {
1106         struct exynos_drm_ipp_ops *ops = NULL;
1107         bool swap = false;
1108         int ret, i;
1109
1110         if (!property) {
1111                 DRM_ERROR("invalid property parameter.\n");
1112                 return -EINVAL;
1113         }
1114
1115         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1116
1117         /* reset h/w block */
1118         if (ippdrv->reset &&
1119             ippdrv->reset(ippdrv->dev)) {
1120                 return -EINVAL;
1121         }
1122
1123         /* set source,destination operations */
1124         for_each_ipp_ops(i) {
1125                 struct drm_exynos_ipp_config *config =
1126                         &property->config[i];
1127
1128                 ops = ippdrv->ops[i];
1129                 if (!ops || !config) {
1130                         DRM_ERROR("not support ops and config.\n");
1131                         return -EINVAL;
1132                 }
1133
1134                 /* set format */
1135                 if (ops->set_fmt) {
1136                         ret = ops->set_fmt(ippdrv->dev, config->fmt);
1137                         if (ret)
1138                                 return ret;
1139                 }
1140
1141                 /* set transform for rotation, flip */
1142                 if (ops->set_transf) {
1143                         ret = ops->set_transf(ippdrv->dev, config->degree,
1144                                 config->flip, &swap);
1145                         if (ret)
1146                                 return ret;
1147                 }
1148
1149                 /* set size */
1150                 if (ops->set_size) {
1151                         ret = ops->set_size(ippdrv->dev, swap, &config->pos,
1152                                 &config->sz);
1153                         if (ret)
1154                                 return ret;
1155                 }
1156         }
1157
1158         return 0;
1159 }
1160
1161 static int ipp_start_property(struct exynos_drm_ippdrv *ippdrv,
1162                 struct drm_exynos_ipp_cmd_node *c_node)
1163 {
1164         struct drm_exynos_ipp_mem_node *m_node;
1165         struct drm_exynos_ipp_property *property = &c_node->property;
1166         struct list_head *head;
1167         int ret, i;
1168
1169         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1170
1171         /* store command info in ippdrv */
1172         ippdrv->c_node = c_node;
1173
1174         mutex_lock(&c_node->mem_lock);
1175         if (!ipp_check_mem_list(c_node)) {
1176                 DRM_DEBUG_KMS("empty memory.\n");
1177                 ret = -ENOMEM;
1178                 goto err_unlock;
1179         }
1180
1181         /* set current property in ippdrv */
1182         ret = ipp_set_property(ippdrv, property);
1183         if (ret) {
1184                 DRM_ERROR("failed to set property.\n");
1185                 ippdrv->c_node = NULL;
1186                 goto err_unlock;
1187         }
1188
1189         /* check command */
1190         switch (property->cmd) {
1191         case IPP_CMD_M2M:
1192                 for_each_ipp_ops(i) {
1193                         /* source/destination memory list */
1194                         head = &c_node->mem_list[i];
1195
1196                         m_node = list_first_entry(head,
1197                                 struct drm_exynos_ipp_mem_node, list);
1198
1199                         DRM_DEBUG_KMS("m_node[0x%x]\n", (int)m_node);
1200
1201                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1202                         if (ret) {
1203                                 DRM_ERROR("failed to set m node.\n");
1204                                 goto err_unlock;
1205                         }
1206                 }
1207                 break;
1208         case IPP_CMD_WB:
1209                 /* destination memory list */
1210                 head = &c_node->mem_list[EXYNOS_DRM_OPS_DST];
1211
1212                 list_for_each_entry(m_node, head, list) {
1213                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1214                         if (ret) {
1215                                 DRM_ERROR("failed to set m node.\n");
1216                                 goto err_unlock;
1217                         }
1218                 }
1219                 break;
1220         case IPP_CMD_OUTPUT:
1221                 /* source memory list */
1222                 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1223
1224                 list_for_each_entry(m_node, head, list) {
1225                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1226                         if (ret) {
1227                                 DRM_ERROR("failed to set m node.\n");
1228                                 goto err_unlock;
1229                         }
1230                 }
1231                 break;
1232         default:
1233                 DRM_ERROR("invalid operations.\n");
1234                 ret = -EINVAL;
1235                 goto err_unlock;
1236         }
1237         mutex_unlock(&c_node->mem_lock);
1238
1239         DRM_DEBUG_KMS("cmd[%d]\n", property->cmd);
1240
1241         /* start operations */
1242         if (ippdrv->start) {
1243                 ret = ippdrv->start(ippdrv->dev, property->cmd);
1244                 if (ret) {
1245                         DRM_ERROR("failed to start ops.\n");
1246                         ippdrv->c_node = NULL;
1247                         return ret;
1248                 }
1249         }
1250
1251         return 0;
1252
1253 err_unlock:
1254         mutex_unlock(&c_node->mem_lock);
1255         ippdrv->c_node = NULL;
1256         return ret;
1257 }
1258
1259 static int ipp_stop_property(struct drm_device *drm_dev,
1260                 struct exynos_drm_ippdrv *ippdrv,
1261                 struct drm_exynos_ipp_cmd_node *c_node)
1262 {
1263         struct drm_exynos_ipp_property *property = &c_node->property;
1264         int i;
1265
1266         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1267
1268         /* stop operations */
1269         if (ippdrv->stop)
1270                 ippdrv->stop(ippdrv->dev, property->cmd);
1271
1272         /* check command */
1273         switch (property->cmd) {
1274         case IPP_CMD_M2M:
1275                 for_each_ipp_ops(i)
1276                         ipp_clean_mem_nodes(drm_dev, c_node, i);
1277                 break;
1278         case IPP_CMD_WB:
1279                 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_DST);
1280                 break;
1281         case IPP_CMD_OUTPUT:
1282                 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_SRC);
1283                 break;
1284         default:
1285                 DRM_ERROR("invalid operations.\n");
1286                 return -EINVAL;
1287         }
1288
1289         return 0;
1290 }
1291
1292 void ipp_sched_cmd(struct work_struct *work)
1293 {
1294         struct drm_exynos_ipp_cmd_work *cmd_work =
1295                 container_of(work, struct drm_exynos_ipp_cmd_work, work);
1296         struct exynos_drm_ippdrv *ippdrv;
1297         struct drm_exynos_ipp_cmd_node *c_node;
1298         struct drm_exynos_ipp_property *property;
1299         int ret;
1300
1301         ippdrv = cmd_work->ippdrv;
1302         if (!ippdrv) {
1303                 DRM_ERROR("invalid ippdrv list.\n");
1304                 return;
1305         }
1306
1307         c_node = cmd_work->c_node;
1308         if (!c_node) {
1309                 DRM_ERROR("invalid command node list.\n");
1310                 return;
1311         }
1312
1313         mutex_lock(&c_node->lock);
1314
1315         property = &c_node->property;
1316
1317         switch (cmd_work->ctrl) {
1318         case IPP_CTRL_PLAY:
1319         case IPP_CTRL_RESUME:
1320                 ret = ipp_start_property(ippdrv, c_node);
1321                 if (ret) {
1322                         DRM_ERROR("failed to start property:prop_id[%d]\n",
1323                                 c_node->property.prop_id);
1324                         goto err_unlock;
1325                 }
1326
1327                 /*
1328                  * M2M case supports wait_completion of transfer.
1329                  * because M2M case supports single unit operation
1330                  * with multiple queue.
1331                  * M2M need to wait completion of data transfer.
1332                  */
1333                 if (ipp_is_m2m_cmd(property->cmd)) {
1334                         if (!wait_for_completion_timeout
1335                             (&c_node->start_complete, msecs_to_jiffies(200))) {
1336                                 DRM_ERROR("timeout event:prop_id[%d]\n",
1337                                         c_node->property.prop_id);
1338                                 goto err_unlock;
1339                         }
1340                 }
1341                 break;
1342         case IPP_CTRL_STOP:
1343         case IPP_CTRL_PAUSE:
1344                 ret = ipp_stop_property(ippdrv->drm_dev, ippdrv,
1345                         c_node);
1346                 if (ret) {
1347                         DRM_ERROR("failed to stop property.\n");
1348                         goto err_unlock;
1349                 }
1350
1351                 complete(&c_node->stop_complete);
1352                 break;
1353         default:
1354                 DRM_ERROR("unknown control type\n");
1355                 break;
1356         }
1357
1358         DRM_DEBUG_KMS("ctrl[%d] done.\n", cmd_work->ctrl);
1359
1360 err_unlock:
1361         mutex_unlock(&c_node->lock);
1362 }
1363
1364 static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
1365                 struct drm_exynos_ipp_cmd_node *c_node, int *buf_id)
1366 {
1367         struct drm_device *drm_dev = ippdrv->drm_dev;
1368         struct drm_exynos_ipp_property *property = &c_node->property;
1369         struct drm_exynos_ipp_mem_node *m_node;
1370         struct drm_exynos_ipp_queue_buf qbuf;
1371         struct drm_exynos_ipp_send_event *e;
1372         struct list_head *head;
1373         struct timeval now;
1374         unsigned long flags;
1375         u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, };
1376         int ret, i;
1377
1378         for_each_ipp_ops(i)
1379                 DRM_DEBUG_KMS("%s buf_id[%d]\n", i ? "dst" : "src", buf_id[i]);
1380
1381         if (!drm_dev) {
1382                 DRM_ERROR("failed to get drm_dev.\n");
1383                 return -EINVAL;
1384         }
1385
1386         if (!property) {
1387                 DRM_ERROR("failed to get property.\n");
1388                 return -EINVAL;
1389         }
1390
1391         mutex_lock(&c_node->event_lock);
1392         if (list_empty(&c_node->event_list)) {
1393                 DRM_DEBUG_KMS("event list is empty.\n");
1394                 ret = 0;
1395                 goto err_event_unlock;
1396         }
1397
1398         mutex_lock(&c_node->mem_lock);
1399         if (!ipp_check_mem_list(c_node)) {
1400                 DRM_DEBUG_KMS("empty memory.\n");
1401                 ret = 0;
1402                 goto err_mem_unlock;
1403         }
1404
1405         /* check command */
1406         switch (property->cmd) {
1407         case IPP_CMD_M2M:
1408                 for_each_ipp_ops(i) {
1409                         /* source/destination memory list */
1410                         head = &c_node->mem_list[i];
1411
1412                         m_node = list_first_entry(head,
1413                                 struct drm_exynos_ipp_mem_node, list);
1414
1415                         tbuf_id[i] = m_node->buf_id;
1416                         DRM_DEBUG_KMS("%s buf_id[%d]\n",
1417                                 i ? "dst" : "src", tbuf_id[i]);
1418
1419                         ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1420                         if (ret)
1421                                 DRM_ERROR("failed to put m_node.\n");
1422                 }
1423                 break;
1424         case IPP_CMD_WB:
1425                 /* clear buf for finding */
1426                 memset(&qbuf, 0x0, sizeof(qbuf));
1427                 qbuf.ops_id = EXYNOS_DRM_OPS_DST;
1428                 qbuf.buf_id = buf_id[EXYNOS_DRM_OPS_DST];
1429
1430                 /* get memory node entry */
1431                 m_node = ipp_find_mem_node(c_node, &qbuf);
1432                 if (!m_node) {
1433                         DRM_ERROR("empty memory node.\n");
1434                         ret = -ENOMEM;
1435                         goto err_mem_unlock;
1436                 }
1437
1438                 tbuf_id[EXYNOS_DRM_OPS_DST] = m_node->buf_id;
1439
1440                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1441                 if (ret)
1442                         DRM_ERROR("failed to put m_node.\n");
1443                 break;
1444         case IPP_CMD_OUTPUT:
1445                 /* source memory list */
1446                 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1447
1448                 m_node = list_first_entry(head,
1449                         struct drm_exynos_ipp_mem_node, list);
1450
1451                 tbuf_id[EXYNOS_DRM_OPS_SRC] = m_node->buf_id;
1452
1453                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1454                 if (ret)
1455                         DRM_ERROR("failed to put m_node.\n");
1456                 break;
1457         default:
1458                 DRM_ERROR("invalid operations.\n");
1459                 ret = -EINVAL;
1460                 goto err_mem_unlock;
1461         }
1462         mutex_unlock(&c_node->mem_lock);
1463
1464         if (tbuf_id[EXYNOS_DRM_OPS_DST] != buf_id[EXYNOS_DRM_OPS_DST])
1465                 DRM_ERROR("failed to match buf_id[%d %d]prop_id[%d]\n",
1466                         tbuf_id[1], buf_id[1], property->prop_id);
1467
1468         /*
1469          * command node have event list of destination buffer
1470          * If destination buffer enqueue to mem list,
1471          * then we make event and link to event list tail.
1472          * so, we get first event for first enqueued buffer.
1473          */
1474         e = list_first_entry(&c_node->event_list,
1475                 struct drm_exynos_ipp_send_event, base.link);
1476
1477         do_gettimeofday(&now);
1478         DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec);
1479         e->event.tv_sec = now.tv_sec;
1480         e->event.tv_usec = now.tv_usec;
1481         e->event.prop_id = property->prop_id;
1482
1483         /* set buffer id about source destination */
1484         for_each_ipp_ops(i)
1485                 e->event.buf_id[i] = tbuf_id[i];
1486
1487         spin_lock_irqsave(&drm_dev->event_lock, flags);
1488         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
1489         wake_up_interruptible(&e->base.file_priv->event_wait);
1490         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1491         mutex_unlock(&c_node->event_lock);
1492
1493         DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
1494                 property->cmd, property->prop_id, tbuf_id[EXYNOS_DRM_OPS_DST]);
1495
1496         return 0;
1497
1498 err_mem_unlock:
1499         mutex_unlock(&c_node->mem_lock);
1500 err_event_unlock:
1501         mutex_unlock(&c_node->event_lock);
1502         return ret;
1503 }
1504
1505 void ipp_sched_event(struct work_struct *work)
1506 {
1507         struct drm_exynos_ipp_event_work *event_work =
1508                 container_of(work, struct drm_exynos_ipp_event_work, work);
1509         struct exynos_drm_ippdrv *ippdrv;
1510         struct drm_exynos_ipp_cmd_node *c_node;
1511         int ret;
1512
1513         if (!event_work) {
1514                 DRM_ERROR("failed to get event_work.\n");
1515                 return;
1516         }
1517
1518         DRM_DEBUG_KMS("buf_id[%d]\n", event_work->buf_id[EXYNOS_DRM_OPS_DST]);
1519
1520         ippdrv = event_work->ippdrv;
1521         if (!ippdrv) {
1522                 DRM_ERROR("failed to get ipp driver.\n");
1523                 return;
1524         }
1525
1526         c_node = ippdrv->c_node;
1527         if (!c_node) {
1528                 DRM_ERROR("failed to get command node.\n");
1529                 return;
1530         }
1531
1532         /*
1533          * IPP supports command thread, event thread synchronization.
1534          * If IPP close immediately from user land, then IPP make
1535          * synchronization with command thread, so make complete event.
1536          * or going out operations.
1537          */
1538         if (c_node->state != IPP_STATE_START) {
1539                 DRM_DEBUG_KMS("bypass state[%d]prop_id[%d]\n",
1540                         c_node->state, c_node->property.prop_id);
1541                 goto err_completion;
1542         }
1543
1544         ret = ipp_send_event(ippdrv, c_node, event_work->buf_id);
1545         if (ret) {
1546                 DRM_ERROR("failed to send event.\n");
1547                 goto err_completion;
1548         }
1549
1550 err_completion:
1551         if (ipp_is_m2m_cmd(c_node->property.cmd))
1552                 complete(&c_node->start_complete);
1553 }
1554
1555 static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1556 {
1557         struct ipp_context *ctx = get_ipp_context(dev);
1558         struct exynos_drm_ippdrv *ippdrv;
1559         int ret, count = 0;
1560
1561         /* get ipp driver entry */
1562         list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1563                 ippdrv->drm_dev = drm_dev;
1564
1565                 ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv);
1566                 if (ret < 0) {
1567                         DRM_ERROR("failed to create id.\n");
1568                         goto err;
1569                 }
1570                 ippdrv->prop_list.ipp_id = ret;
1571
1572                 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]ipp_id[%d]\n",
1573                         count++, (int)ippdrv, ret);
1574
1575                 /* store parent device for node */
1576                 ippdrv->parent_dev = dev;
1577
1578                 /* store event work queue and handler */
1579                 ippdrv->event_workq = ctx->event_workq;
1580                 ippdrv->sched_event = ipp_sched_event;
1581                 INIT_LIST_HEAD(&ippdrv->cmd_list);
1582                 mutex_init(&ippdrv->cmd_lock);
1583
1584                 if (is_drm_iommu_supported(drm_dev)) {
1585                         ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
1586                         if (ret) {
1587                                 DRM_ERROR("failed to activate iommu\n");
1588                                 goto err;
1589                         }
1590                 }
1591         }
1592
1593         return 0;
1594
1595 err:
1596         /* get ipp driver entry */
1597         list_for_each_entry_continue_reverse(ippdrv, &exynos_drm_ippdrv_list,
1598                                                 drv_list) {
1599                 if (is_drm_iommu_supported(drm_dev))
1600                         drm_iommu_detach_device(drm_dev, ippdrv->dev);
1601
1602                 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1603                                 ippdrv->prop_list.ipp_id);
1604         }
1605
1606         return ret;
1607 }
1608
1609 static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1610 {
1611         struct exynos_drm_ippdrv *ippdrv, *t;
1612         struct ipp_context *ctx = get_ipp_context(dev);
1613
1614         /* get ipp driver entry */
1615         list_for_each_entry_safe(ippdrv, t, &exynos_drm_ippdrv_list, drv_list) {
1616                 if (is_drm_iommu_supported(drm_dev))
1617                         drm_iommu_detach_device(drm_dev, ippdrv->dev);
1618
1619                 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1620                                 ippdrv->prop_list.ipp_id);
1621
1622                 ippdrv->drm_dev = NULL;
1623                 exynos_drm_ippdrv_unregister(ippdrv);
1624         }
1625 }
1626
1627 static int ipp_subdrv_open(struct drm_device *drm_dev, struct device *dev,
1628                 struct drm_file *file)
1629 {
1630         struct drm_exynos_file_private *file_priv = file->driver_priv;
1631
1632         file_priv->ipp_dev = dev;
1633
1634         DRM_DEBUG_KMS("done priv[0x%x]\n", (int)dev);
1635
1636         return 0;
1637 }
1638
1639 static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
1640                 struct drm_file *file)
1641 {
1642         struct exynos_drm_ippdrv *ippdrv = NULL;
1643         struct ipp_context *ctx = get_ipp_context(dev);
1644         struct drm_exynos_ipp_cmd_node *c_node, *tc_node;
1645         int count = 0;
1646
1647         list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1648                 mutex_lock(&ippdrv->cmd_lock);
1649                 list_for_each_entry_safe(c_node, tc_node,
1650                         &ippdrv->cmd_list, list) {
1651                         DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n",
1652                                 count++, (int)ippdrv);
1653
1654                         if (c_node->filp == file) {
1655                                 /*
1656                                  * userland goto unnormal state. process killed.
1657                                  * and close the file.
1658                                  * so, IPP didn't called stop cmd ctrl.
1659                                  * so, we are make stop operation in this state.
1660                                  */
1661                                 if (c_node->state == IPP_STATE_START) {
1662                                         ipp_stop_property(drm_dev, ippdrv,
1663                                                 c_node);
1664                                         c_node->state = IPP_STATE_STOP;
1665                                 }
1666
1667                                 ippdrv->dedicated = false;
1668                                 ipp_clean_cmd_node(ctx, c_node);
1669                                 if (list_empty(&ippdrv->cmd_list))
1670                                         pm_runtime_put_sync(ippdrv->dev);
1671                         }
1672                 }
1673                 mutex_unlock(&ippdrv->cmd_lock);
1674         }
1675
1676         return;
1677 }
1678
1679 static int ipp_probe(struct platform_device *pdev)
1680 {
1681         struct device *dev = &pdev->dev;
1682         struct ipp_context *ctx;
1683         struct exynos_drm_subdrv *subdrv;
1684         int ret;
1685
1686         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1687         if (!ctx)
1688                 return -ENOMEM;
1689
1690         mutex_init(&ctx->ipp_lock);
1691         mutex_init(&ctx->prop_lock);
1692
1693         idr_init(&ctx->ipp_idr);
1694         idr_init(&ctx->prop_idr);
1695
1696         /*
1697          * create single thread for ipp event
1698          * IPP supports event thread for IPP drivers.
1699          * IPP driver send event_work to this thread.
1700          * and IPP event thread send event to user process.
1701          */
1702         ctx->event_workq = create_singlethread_workqueue("ipp_event");
1703         if (!ctx->event_workq) {
1704                 dev_err(dev, "failed to create event workqueue\n");
1705                 return -EINVAL;
1706         }
1707
1708         /*
1709          * create single thread for ipp command
1710          * IPP supports command thread for user process.
1711          * user process make command node using set property ioctl.
1712          * and make start_work and send this work to command thread.
1713          * and then this command thread start property.
1714          */
1715         ctx->cmd_workq = create_singlethread_workqueue("ipp_cmd");
1716         if (!ctx->cmd_workq) {
1717                 dev_err(dev, "failed to create cmd workqueue\n");
1718                 ret = -EINVAL;
1719                 goto err_event_workq;
1720         }
1721
1722         /* set sub driver informations */
1723         subdrv = &ctx->subdrv;
1724         subdrv->dev = dev;
1725         subdrv->probe = ipp_subdrv_probe;
1726         subdrv->remove = ipp_subdrv_remove;
1727         subdrv->open = ipp_subdrv_open;
1728         subdrv->close = ipp_subdrv_close;
1729
1730         platform_set_drvdata(pdev, ctx);
1731
1732         ret = exynos_drm_subdrv_register(subdrv);
1733         if (ret < 0) {
1734                 DRM_ERROR("failed to register drm ipp device.\n");
1735                 goto err_cmd_workq;
1736         }
1737
1738         dev_info(dev, "drm ipp registered successfully.\n");
1739
1740         return 0;
1741
1742 err_cmd_workq:
1743         destroy_workqueue(ctx->cmd_workq);
1744 err_event_workq:
1745         destroy_workqueue(ctx->event_workq);
1746         return ret;
1747 }
1748
1749 static int ipp_remove(struct platform_device *pdev)
1750 {
1751         struct ipp_context *ctx = platform_get_drvdata(pdev);
1752
1753         /* unregister sub driver */
1754         exynos_drm_subdrv_unregister(&ctx->subdrv);
1755
1756         /* remove,destroy ipp idr */
1757         idr_destroy(&ctx->ipp_idr);
1758         idr_destroy(&ctx->prop_idr);
1759
1760         mutex_destroy(&ctx->ipp_lock);
1761         mutex_destroy(&ctx->prop_lock);
1762
1763         /* destroy command, event work queue */
1764         destroy_workqueue(ctx->cmd_workq);
1765         destroy_workqueue(ctx->event_workq);
1766
1767         return 0;
1768 }
1769
1770 struct platform_driver ipp_driver = {
1771         .probe          = ipp_probe,
1772         .remove         = ipp_remove,
1773         .driver         = {
1774                 .name   = "exynos-drm-ipp",
1775                 .owner  = THIS_MODULE,
1776         },
1777 };
1778