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                 goto err_remove_id;
 430         }
 431
 432         c_node->stop_work = ipp_create_cmd_work();
 433         if (IS_ERR(c_node->stop_work)) {
 434                 DRM_ERROR("failed to create stop work.\n");
 435                 goto err_free_start;
 436         }
 437
 438         c_node->event_work = ipp_create_event_work();
 439         if (IS_ERR(c_node->event_work)) {
 440                 DRM_ERROR("failed to create event work.\n");
 441                 goto err_free_stop;
 442         }
 443
 444         mutex_init(&c_node->lock);
 445         mutex_init(&c_node->mem_lock);
 446         mutex_init(&c_node->event_lock);
 447
 448         init_completion(&c_node->start_complete);
 449         init_completion(&c_node->stop_complete);
 450
 451         for_each_ipp_ops(i)
 452                 INIT_LIST_HEAD(&c_node->mem_list[i]);
 453
 454         INIT_LIST_HEAD(&c_node->event_list);
 455         mutex_lock(&ippdrv->cmd_lock);
 456         list_add_tail(&c_node->list, &ippdrv->cmd_list);
 457         mutex_unlock(&ippdrv->cmd_lock);
 458
 459         /* make dedicated state without m2m */
 460         if (!ipp_is_m2m_cmd(property->cmd))
 461                 ippdrv->dedicated = true;
 462
 463         return 0;
 464
 465 err_free_stop:
 466         kfree(c_node->stop_work);
 467 err_free_start:
 468         kfree(c_node->start_work);
 469 err_remove_id:
 470         ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock, property->prop_id);
 471 err_clear:
 472         kfree(c_node);
 473         return ret;
 474 }
 475
 476 static int ipp_put_mem_node(struct drm_device *drm_dev,
 477                 struct drm_exynos_ipp_cmd_node *c_node,
 478                 struct drm_exynos_ipp_mem_node *m_node)
 479 {
 480         int i;
 481
 482         DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
 483
 484         if (!m_node) {
 485                 DRM_ERROR("invalid dequeue node.\n");
 486                 return -EFAULT;
 487         }
 488
 489         DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
 490
 491         /* put gem buffer */
 492         for_each_ipp_planar(i) {
 493                 unsigned long handle = m_node->buf_info.handles[i];
 494                 if (handle)
 495                         exynos_drm_gem_put_dma_addr(drm_dev, handle,
 496                                                         c_node->filp);
 497         }
 498
 499         list_del(&m_node->list);
 500         kfree(m_node);
 501
 502         return 0;
 503 }
 504
 505 static struct drm_exynos_ipp_mem_node
 506                 *ipp_get_mem_node(struct drm_device *drm_dev,
 507                 struct drm_exynos_ipp_cmd_node *c_node,
 508                 struct drm_exynos_ipp_queue_buf *qbuf)
 509 {
 510         struct drm_exynos_ipp_mem_node *m_node;
 511         struct drm_exynos_ipp_buf_info *buf_info;
 512         int i;
 513
 514         m_node = kzalloc(sizeof(*m_node), GFP_KERNEL);
 515         if (!m_node)
 516                 return ERR_PTR(-ENOMEM);
 517
 518         buf_info = &m_node->buf_info;
 519
 520         /* operations, buffer id */
 521         m_node->ops_id = qbuf->ops_id;
 522         m_node->prop_id = qbuf->prop_id;
 523         m_node->buf_id = qbuf->buf_id;
 524         INIT_LIST_HEAD(&m_node->list);
 525
 526         DRM_DEBUG_KMS("m_node[0x%x]ops_id[%d]\n", (int)m_node, qbuf->ops_id);
 527         DRM_DEBUG_KMS("prop_id[%d]buf_id[%d]\n", qbuf->prop_id, m_node->buf_id);
 528
 529         for_each_ipp_planar(i) {
 530                 DRM_DEBUG_KMS("i[%d]handle[0x%x]\n", i, qbuf->handle[i]);
 531
 532                 /* get dma address by handle */
 533                 if (qbuf->handle[i]) {
 534                         dma_addr_t *addr;
 535
 536                         addr = exynos_drm_gem_get_dma_addr(drm_dev,
 537                                         qbuf->handle[i], c_node->filp);
 538                         if (IS_ERR(addr)) {
 539                                 DRM_ERROR("failed to get addr.\n");
 540                                 ipp_put_mem_node(drm_dev, c_node, m_node);
 541                                 return ERR_PTR(-EFAULT);
 542                         }
 543
 544                         buf_info->handles[i] = qbuf->handle[i];
 545                         buf_info->base[i] = *addr;
 546                         DRM_DEBUG_KMS("i[%d]base[0x%x]hd[0x%lx]\n", i,
 547                                       buf_info->base[i], buf_info->handles[i]);
 548                 }
 549         }
 550
 551         mutex_lock(&c_node->mem_lock);
 552         list_add_tail(&m_node->list, &c_node->mem_list[qbuf->ops_id]);
 553         mutex_unlock(&c_node->mem_lock);
 554
 555         return m_node;
 556 }
 557
 558 static void ipp_clean_mem_nodes(struct drm_device *drm_dev,
 559                                struct drm_exynos_ipp_cmd_node *c_node, int ops)
 560 {
 561         struct drm_exynos_ipp_mem_node *m_node, *tm_node;
 562         struct list_head *head = &c_node->mem_list[ops];
 563
 564         mutex_lock(&c_node->mem_lock);
 565
 566         list_for_each_entry_safe(m_node, tm_node, head, list) {
 567                 int ret;
 568
 569                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
 570                 if (ret)
 571                         DRM_ERROR("failed to put m_node.\n");
 572         }
 573
 574         mutex_unlock(&c_node->mem_lock);
 575 }
 576
 577 static void ipp_free_event(struct drm_pending_event *event)
 578 {
 579         kfree(event);
 580 }
 581
 582 static int ipp_get_event(struct drm_device *drm_dev,
 583                 struct drm_exynos_ipp_cmd_node *c_node,
 584                 struct drm_exynos_ipp_queue_buf *qbuf)
 585 {
 586         struct drm_exynos_ipp_send_event *e;
 587         unsigned long flags;
 588
 589         DRM_DEBUG_KMS("ops_id[%d]buf_id[%d]\n", qbuf->ops_id, qbuf->buf_id);
 590
 591         e = kzalloc(sizeof(*e), GFP_KERNEL);
 592         if (!e) {
 593                 spin_lock_irqsave(&drm_dev->event_lock, flags);
 594                 c_node->filp->event_space += sizeof(e->event);
 595                 spin_unlock_irqrestore(&drm_dev->event_lock, flags);
 596                 return -ENOMEM;
 597         }
 598
 599         /* make event */
 600         e->event.base.type = DRM_EXYNOS_IPP_EVENT;
 601         e->event.base.length = sizeof(e->event);
 602         e->event.user_data = qbuf->user_data;
 603         e->event.prop_id = qbuf->prop_id;
 604         e->event.buf_id[EXYNOS_DRM_OPS_DST] = qbuf->buf_id;
 605         e->base.event = &e->event.base;
 606         e->base.file_priv = c_node->filp;
 607         e->base.destroy = ipp_free_event;
 608         mutex_lock(&c_node->event_lock);
 609         list_add_tail(&e->base.link, &c_node->event_list);
 610         mutex_unlock(&c_node->event_lock);
 611
 612         return 0;
 613 }
 614
 615 static void ipp_put_event(struct drm_exynos_ipp_cmd_node *c_node,
 616                 struct drm_exynos_ipp_queue_buf *qbuf)
 617 {
 618         struct drm_exynos_ipp_send_event *e, *te;
 619         int count = 0;
 620
 621         mutex_lock(&c_node->event_lock);
 622         list_for_each_entry_safe(e, te, &c_node->event_list, base.link) {
 623                 DRM_DEBUG_KMS("count[%d]e[0x%x]\n", count++, (int)e);
 624
 625                 /*
 626                  * qbuf == NULL condition means all event deletion.
 627                  * stop operations want to delete all event list.
 628                  * another case delete only same buf id.
 629                  */
 630                 if (!qbuf) {
 631                         /* delete list */
 632                         list_del(&e->base.link);
 633                         kfree(e);
 634                 }
 635
 636                 /* compare buffer id */
 637                 if (qbuf && (qbuf->buf_id ==
 638                     e->event.buf_id[EXYNOS_DRM_OPS_DST])) {
 639                         /* delete list */
 640                         list_del(&e->base.link);
 641                         kfree(e);
 642                         goto out_unlock;
 643                 }
 644         }
 645
 646 out_unlock:
 647         mutex_unlock(&c_node->event_lock);
 648         return;
 649 }
 650
 651 static void ipp_clean_cmd_node(struct ipp_context *ctx,
 652                                 struct drm_exynos_ipp_cmd_node *c_node)
 653 {
 654         int i;
 655
 656         /* cancel works */
 657         cancel_work_sync(&c_node->start_work->work);
 658         cancel_work_sync(&c_node->stop_work->work);
 659         cancel_work_sync(&c_node->event_work->work);
 660
 661         /* put event */
 662         ipp_put_event(c_node, NULL);
 663
 664         for_each_ipp_ops(i)
 665                 ipp_clean_mem_nodes(ctx->subdrv.drm_dev, c_node, i);
 666
 667         /* delete list */
 668         list_del(&c_node->list);
 669
 670         ipp_remove_id(&ctx->prop_idr, &ctx->prop_lock,
 671                         c_node->property.prop_id);
 672
 673         /* destroy mutex */
 674         mutex_destroy(&c_node->lock);
 675         mutex_destroy(&c_node->mem_lock);
 676         mutex_destroy(&c_node->event_lock);
 677
 678         /* free command node */
 679         kfree(c_node->start_work);
 680         kfree(c_node->stop_work);
 681         kfree(c_node->event_work);
 682         kfree(c_node);
 683 }
 684
 685 static bool ipp_check_mem_list(struct drm_exynos_ipp_cmd_node *c_node)
 686 {
 687         switch (c_node->property.cmd) {
 688         case IPP_CMD_WB:
 689                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
 690         case IPP_CMD_OUTPUT:
 691                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]);
 692         case IPP_CMD_M2M:
 693         default:
 694                 return !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_SRC]) &&
 695                        !list_empty(&c_node->mem_list[EXYNOS_DRM_OPS_DST]);
 696         }
 697 }
 698
 699 static struct drm_exynos_ipp_mem_node
 700                 *ipp_find_mem_node(struct drm_exynos_ipp_cmd_node *c_node,
 701                 struct drm_exynos_ipp_queue_buf *qbuf)
 702 {
 703         struct drm_exynos_ipp_mem_node *m_node;
 704         struct list_head *head;
 705         int count = 0;
 706
 707         DRM_DEBUG_KMS("buf_id[%d]\n", qbuf->buf_id);
 708
 709         /* source/destination memory list */
 710         head = &c_node->mem_list[qbuf->ops_id];
 711
 712         /* find memory node from memory list */
 713         list_for_each_entry(m_node, head, list) {
 714                 DRM_DEBUG_KMS("count[%d]m_node[0x%x]\n", count++, (int)m_node);
 715
 716                 /* compare buffer id */
 717                 if (m_node->buf_id == qbuf->buf_id)
 718                         return m_node;
 719         }
 720
 721         return NULL;
 722 }
 723
 724 static int ipp_set_mem_node(struct exynos_drm_ippdrv *ippdrv,
 725                 struct drm_exynos_ipp_cmd_node *c_node,
 726                 struct drm_exynos_ipp_mem_node *m_node)
 727 {
 728         struct exynos_drm_ipp_ops *ops = NULL;
 729         int ret = 0;
 730
 731         DRM_DEBUG_KMS("node[0x%x]\n", (int)m_node);
 732
 733         if (!m_node) {
 734                 DRM_ERROR("invalid queue node.\n");
 735                 return -EFAULT;
 736         }
 737
 738         DRM_DEBUG_KMS("ops_id[%d]\n", m_node->ops_id);
 739
 740         /* get operations callback */
 741         ops = ippdrv->ops[m_node->ops_id];
 742         if (!ops) {
 743                 DRM_ERROR("not support ops.\n");
 744                 return -EFAULT;
 745         }
 746
 747         /* set address and enable irq */
 748         if (ops->set_addr) {
 749                 ret = ops->set_addr(ippdrv->dev, &m_node->buf_info,
 750                         m_node->buf_id, IPP_BUF_ENQUEUE);
 751                 if (ret) {
 752                         DRM_ERROR("failed to set addr.\n");
 753                         return ret;
 754                 }
 755         }
 756
 757         return ret;
 758 }
 759
 760 static void ipp_handle_cmd_work(struct device *dev,
 761                 struct exynos_drm_ippdrv *ippdrv,
 762                 struct drm_exynos_ipp_cmd_work *cmd_work,
 763                 struct drm_exynos_ipp_cmd_node *c_node)
 764 {
 765         struct ipp_context *ctx = get_ipp_context(dev);
 766
 767         cmd_work->ippdrv = ippdrv;
 768         cmd_work->c_node = c_node;
 769         queue_work(ctx->cmd_workq, &cmd_work->work);
 770 }
 771
 772 static int ipp_queue_buf_with_run(struct device *dev,
 773                 struct drm_exynos_ipp_cmd_node *c_node,
 774                 struct drm_exynos_ipp_mem_node *m_node,
 775                 struct drm_exynos_ipp_queue_buf *qbuf)
 776 {
 777         struct exynos_drm_ippdrv *ippdrv;
 778         struct drm_exynos_ipp_property *property;
 779         struct exynos_drm_ipp_ops *ops;
 780         int ret;
 781
 782         ippdrv = ipp_find_drv_by_handle(qbuf->prop_id);
 783         if (IS_ERR(ippdrv)) {
 784                 DRM_ERROR("failed to get ipp driver.\n");
 785                 return -EFAULT;
 786         }
 787
 788         ops = ippdrv->ops[qbuf->ops_id];
 789         if (!ops) {
 790                 DRM_ERROR("failed to get ops.\n");
 791                 return -EFAULT;
 792         }
 793
 794         property = &c_node->property;
 795
 796         if (c_node->state != IPP_STATE_START) {
 797                 DRM_DEBUG_KMS("bypass for invalid state.\n");
 798                 return 0;
 799         }
 800
 801         mutex_lock(&c_node->mem_lock);
 802         if (!ipp_check_mem_list(c_node)) {
 803                 mutex_unlock(&c_node->mem_lock);
 804                 DRM_DEBUG_KMS("empty memory.\n");
 805                 return 0;
 806         }
 807
 808         /*
 809          * If set destination buffer and enabled clock,
 810          * then m2m operations need start operations at queue_buf
 811          */
 812         if (ipp_is_m2m_cmd(property->cmd)) {
 813                 struct drm_exynos_ipp_cmd_work *cmd_work = c_node->start_work;
 814
 815                 cmd_work->ctrl = IPP_CTRL_PLAY;
 816                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
 817         } else {
 818                 ret = ipp_set_mem_node(ippdrv, c_node, m_node);
 819                 if (ret) {
 820                         mutex_unlock(&c_node->mem_lock);
 821                         DRM_ERROR("failed to set m node.\n");
 822                         return ret;
 823                 }
 824         }
 825         mutex_unlock(&c_node->mem_lock);
 826
 827         return 0;
 828 }
 829
 830 static void ipp_clean_queue_buf(struct drm_device *drm_dev,
 831                 struct drm_exynos_ipp_cmd_node *c_node,
 832                 struct drm_exynos_ipp_queue_buf *qbuf)
 833 {
 834         struct drm_exynos_ipp_mem_node *m_node, *tm_node;
 835
 836         /* delete list */
 837         mutex_lock(&c_node->mem_lock);
 838         list_for_each_entry_safe(m_node, tm_node,
 839                 &c_node->mem_list[qbuf->ops_id], list) {
 840                 if (m_node->buf_id == qbuf->buf_id &&
 841                     m_node->ops_id == qbuf->ops_id)
 842                         ipp_put_mem_node(drm_dev, c_node, m_node);
 843         }
 844         mutex_unlock(&c_node->mem_lock);
 845 }
 846
 847 int exynos_drm_ipp_queue_buf(struct drm_device *drm_dev, void *data,
 848                 struct drm_file *file)
 849 {
 850         struct drm_exynos_file_private *file_priv = file->driver_priv;
 851         struct device *dev = file_priv->ipp_dev;
 852         struct ipp_context *ctx = get_ipp_context(dev);
 853         struct drm_exynos_ipp_queue_buf *qbuf = data;
 854         struct drm_exynos_ipp_cmd_node *c_node;
 855         struct drm_exynos_ipp_mem_node *m_node;
 856         int ret;
 857
 858         if (!qbuf) {
 859                 DRM_ERROR("invalid buf parameter.\n");
 860                 return -EINVAL;
 861         }
 862
 863         if (qbuf->ops_id >= EXYNOS_DRM_OPS_MAX) {
 864                 DRM_ERROR("invalid ops parameter.\n");
 865                 return -EINVAL;
 866         }
 867
 868         DRM_DEBUG_KMS("prop_id[%d]ops_id[%s]buf_id[%d]buf_type[%d]\n",
 869                 qbuf->prop_id, qbuf->ops_id ? "dst" : "src",
 870                 qbuf->buf_id, qbuf->buf_type);
 871
 872         /* find command node */
 873         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
 874                 qbuf->prop_id);
 875         if (!c_node || c_node->filp != file) {
 876                 DRM_ERROR("failed to get command node.\n");
 877                 return -ENODEV;
 878         }
 879
 880         /* buffer control */
 881         switch (qbuf->buf_type) {
 882         case IPP_BUF_ENQUEUE:
 883                 /* get memory node */
 884                 m_node = ipp_get_mem_node(drm_dev, c_node, qbuf);
 885                 if (IS_ERR(m_node)) {
 886                         DRM_ERROR("failed to get m_node.\n");
 887                         return PTR_ERR(m_node);
 888                 }
 889
 890                 /*
 891                  * first step get event for destination buffer.
 892                  * and second step when M2M case run with destination buffer
 893                  * if needed.
 894                  */
 895                 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST) {
 896                         /* get event for destination buffer */
 897                         ret = ipp_get_event(drm_dev, c_node, qbuf);
 898                         if (ret) {
 899                                 DRM_ERROR("failed to get event.\n");
 900                                 goto err_clean_node;
 901                         }
 902
 903                         /*
 904                          * M2M case run play control for streaming feature.
 905                          * other case set address and waiting.
 906                          */
 907                         ret = ipp_queue_buf_with_run(dev, c_node, m_node, qbuf);
 908                         if (ret) {
 909                                 DRM_ERROR("failed to run command.\n");
 910                                 goto err_clean_node;
 911                         }
 912                 }
 913                 break;
 914         case IPP_BUF_DEQUEUE:
 915                 mutex_lock(&c_node->lock);
 916
 917                 /* put event for destination buffer */
 918                 if (qbuf->ops_id == EXYNOS_DRM_OPS_DST)
 919                         ipp_put_event(c_node, qbuf);
 920
 921                 ipp_clean_queue_buf(drm_dev, c_node, qbuf);
 922
 923                 mutex_unlock(&c_node->lock);
 924                 break;
 925         default:
 926                 DRM_ERROR("invalid buffer control.\n");
 927                 return -EINVAL;
 928         }
 929
 930         return 0;
 931
 932 err_clean_node:
 933         DRM_ERROR("clean memory nodes.\n");
 934
 935         ipp_clean_queue_buf(drm_dev, c_node, qbuf);
 936         return ret;
 937 }
 938
 939 static bool exynos_drm_ipp_check_valid(struct device *dev,
 940                 enum drm_exynos_ipp_ctrl ctrl, enum drm_exynos_ipp_state state)
 941 {
 942         if (ctrl != IPP_CTRL_PLAY) {
 943                 if (pm_runtime_suspended(dev)) {
 944                         DRM_ERROR("pm:runtime_suspended.\n");
 945                         goto err_status;
 946                 }
 947         }
 948
 949         switch (ctrl) {
 950         case IPP_CTRL_PLAY:
 951                 if (state != IPP_STATE_IDLE)
 952                         goto err_status;
 953                 break;
 954         case IPP_CTRL_STOP:
 955                 if (state == IPP_STATE_STOP)
 956                         goto err_status;
 957                 break;
 958         case IPP_CTRL_PAUSE:
 959                 if (state != IPP_STATE_START)
 960                         goto err_status;
 961                 break;
 962         case IPP_CTRL_RESUME:
 963                 if (state != IPP_STATE_STOP)
 964                         goto err_status;
 965                 break;
 966         default:
 967                 DRM_ERROR("invalid state.\n");
 968                 goto err_status;
 969         }
 970
 971         return true;
 972
 973 err_status:
 974         DRM_ERROR("invalid status:ctrl[%d]state[%d]\n", ctrl, state);
 975         return false;
 976 }
 977
 978 int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
 979                 struct drm_file *file)
 980 {
 981         struct drm_exynos_file_private *file_priv = file->driver_priv;
 982         struct exynos_drm_ippdrv *ippdrv = NULL;
 983         struct device *dev = file_priv->ipp_dev;
 984         struct ipp_context *ctx = get_ipp_context(dev);
 985         struct drm_exynos_ipp_cmd_ctrl *cmd_ctrl = data;
 986         struct drm_exynos_ipp_cmd_work *cmd_work;
 987         struct drm_exynos_ipp_cmd_node *c_node;
 988
 989         if (!ctx) {
 990                 DRM_ERROR("invalid context.\n");
 991                 return -EINVAL;
 992         }
 993
 994         if (!cmd_ctrl) {
 995                 DRM_ERROR("invalid control parameter.\n");
 996                 return -EINVAL;
 997         }
 998
 999         DRM_DEBUG_KMS("ctrl[%d]prop_id[%d]\n",
1000                 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1001
1002         ippdrv = ipp_find_drv_by_handle(cmd_ctrl->prop_id);
1003         if (IS_ERR(ippdrv)) {
1004                 DRM_ERROR("failed to get ipp driver.\n");
1005                 return PTR_ERR(ippdrv);
1006         }
1007
1008         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
1009                 cmd_ctrl->prop_id);
1010         if (!c_node || c_node->filp != file) {
1011                 DRM_ERROR("invalid command node list.\n");
1012                 return -ENODEV;
1013         }
1014
1015         if (!exynos_drm_ipp_check_valid(ippdrv->dev, cmd_ctrl->ctrl,
1016             c_node->state)) {
1017                 DRM_ERROR("invalid state.\n");
1018                 return -EINVAL;
1019         }
1020
1021         switch (cmd_ctrl->ctrl) {
1022         case IPP_CTRL_PLAY:
1023                 if (pm_runtime_suspended(ippdrv->dev))
1024                         pm_runtime_get_sync(ippdrv->dev);
1025
1026                 c_node->state = IPP_STATE_START;
1027
1028                 cmd_work = c_node->start_work;
1029                 cmd_work->ctrl = cmd_ctrl->ctrl;
1030                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1031                 break;
1032         case IPP_CTRL_STOP:
1033                 cmd_work = c_node->stop_work;
1034                 cmd_work->ctrl = cmd_ctrl->ctrl;
1035                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1036
1037                 if (!wait_for_completion_timeout(&c_node->stop_complete,
1038                     msecs_to_jiffies(300))) {
1039                         DRM_ERROR("timeout stop:prop_id[%d]\n",
1040                                 c_node->property.prop_id);
1041                 }
1042
1043                 c_node->state = IPP_STATE_STOP;
1044                 ippdrv->dedicated = false;
1045                 mutex_lock(&ippdrv->cmd_lock);
1046                 ipp_clean_cmd_node(ctx, c_node);
1047
1048                 if (list_empty(&ippdrv->cmd_list))
1049                         pm_runtime_put_sync(ippdrv->dev);
1050                 mutex_unlock(&ippdrv->cmd_lock);
1051                 break;
1052         case IPP_CTRL_PAUSE:
1053                 cmd_work = c_node->stop_work;
1054                 cmd_work->ctrl = cmd_ctrl->ctrl;
1055                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1056
1057                 if (!wait_for_completion_timeout(&c_node->stop_complete,
1058                     msecs_to_jiffies(200))) {
1059                         DRM_ERROR("timeout stop:prop_id[%d]\n",
1060                                 c_node->property.prop_id);
1061                 }
1062
1063                 c_node->state = IPP_STATE_STOP;
1064                 break;
1065         case IPP_CTRL_RESUME:
1066                 c_node->state = IPP_STATE_START;
1067                 cmd_work = c_node->start_work;
1068                 cmd_work->ctrl = cmd_ctrl->ctrl;
1069                 ipp_handle_cmd_work(dev, ippdrv, cmd_work, c_node);
1070                 break;
1071         default:
1072                 DRM_ERROR("could not support this state currently.\n");
1073                 return -EINVAL;
1074         }
1075
1076         DRM_DEBUG_KMS("done ctrl[%d]prop_id[%d]\n",
1077                 cmd_ctrl->ctrl, cmd_ctrl->prop_id);
1078
1079         return 0;
1080 }
1081
1082 int exynos_drm_ippnb_register(struct notifier_block *nb)
1083 {
1084         return blocking_notifier_chain_register(
1085                 &exynos_drm_ippnb_list, nb);
1086 }
1087
1088 int exynos_drm_ippnb_unregister(struct notifier_block *nb)
1089 {
1090         return blocking_notifier_chain_unregister(
1091                 &exynos_drm_ippnb_list, nb);
1092 }
1093
1094 int exynos_drm_ippnb_send_event(unsigned long val, void *v)
1095 {
1096         return blocking_notifier_call_chain(
1097                 &exynos_drm_ippnb_list, val, v);
1098 }
1099
1100 static int ipp_set_property(struct exynos_drm_ippdrv *ippdrv,
1101                 struct drm_exynos_ipp_property *property)
1102 {
1103         struct exynos_drm_ipp_ops *ops = NULL;
1104         bool swap = false;
1105         int ret, i;
1106
1107         if (!property) {
1108                 DRM_ERROR("invalid property parameter.\n");
1109                 return -EINVAL;
1110         }
1111
1112         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1113
1114         /* reset h/w block */
1115         if (ippdrv->reset &&
1116             ippdrv->reset(ippdrv->dev)) {
1117                 return -EINVAL;
1118         }
1119
1120         /* set source,destination operations */
1121         for_each_ipp_ops(i) {
1122                 struct drm_exynos_ipp_config *config =
1123                         &property->config[i];
1124
1125                 ops = ippdrv->ops[i];
1126                 if (!ops || !config) {
1127                         DRM_ERROR("not support ops and config.\n");
1128                         return -EINVAL;
1129                 }
1130
1131                 /* set format */
1132                 if (ops->set_fmt) {
1133                         ret = ops->set_fmt(ippdrv->dev, config->fmt);
1134                         if (ret)
1135                                 return ret;
1136                 }
1137
1138                 /* set transform for rotation, flip */
1139                 if (ops->set_transf) {
1140                         ret = ops->set_transf(ippdrv->dev, config->degree,
1141                                 config->flip, &swap);
1142                         if (ret)
1143                                 return ret;
1144                 }
1145
1146                 /* set size */
1147                 if (ops->set_size) {
1148                         ret = ops->set_size(ippdrv->dev, swap, &config->pos,
1149                                 &config->sz);
1150                         if (ret)
1151                                 return ret;
1152                 }
1153         }
1154
1155         return 0;
1156 }
1157
1158 static int ipp_start_property(struct exynos_drm_ippdrv *ippdrv,
1159                 struct drm_exynos_ipp_cmd_node *c_node)
1160 {
1161         struct drm_exynos_ipp_mem_node *m_node;
1162         struct drm_exynos_ipp_property *property = &c_node->property;
1163         struct list_head *head;
1164         int ret, i;
1165
1166         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1167
1168         /* store command info in ippdrv */
1169         ippdrv->c_node = c_node;
1170
1171         mutex_lock(&c_node->mem_lock);
1172         if (!ipp_check_mem_list(c_node)) {
1173                 DRM_DEBUG_KMS("empty memory.\n");
1174                 ret = -ENOMEM;
1175                 goto err_unlock;
1176         }
1177
1178         /* set current property in ippdrv */
1179         ret = ipp_set_property(ippdrv, property);
1180         if (ret) {
1181                 DRM_ERROR("failed to set property.\n");
1182                 ippdrv->c_node = NULL;
1183                 goto err_unlock;
1184         }
1185
1186         /* check command */
1187         switch (property->cmd) {
1188         case IPP_CMD_M2M:
1189                 for_each_ipp_ops(i) {
1190                         /* source/destination memory list */
1191                         head = &c_node->mem_list[i];
1192
1193                         m_node = list_first_entry(head,
1194                                 struct drm_exynos_ipp_mem_node, list);
1195
1196                         DRM_DEBUG_KMS("m_node[0x%x]\n", (int)m_node);
1197
1198                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1199                         if (ret) {
1200                                 DRM_ERROR("failed to set m node.\n");
1201                                 goto err_unlock;
1202                         }
1203                 }
1204                 break;
1205         case IPP_CMD_WB:
1206                 /* destination memory list */
1207                 head = &c_node->mem_list[EXYNOS_DRM_OPS_DST];
1208
1209                 list_for_each_entry(m_node, head, list) {
1210                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1211                         if (ret) {
1212                                 DRM_ERROR("failed to set m node.\n");
1213                                 goto err_unlock;
1214                         }
1215                 }
1216                 break;
1217         case IPP_CMD_OUTPUT:
1218                 /* source memory list */
1219                 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1220
1221                 list_for_each_entry(m_node, head, list) {
1222                         ret = ipp_set_mem_node(ippdrv, c_node, m_node);
1223                         if (ret) {
1224                                 DRM_ERROR("failed to set m node.\n");
1225                                 goto err_unlock;
1226                         }
1227                 }
1228                 break;
1229         default:
1230                 DRM_ERROR("invalid operations.\n");
1231                 ret = -EINVAL;
1232                 goto err_unlock;
1233         }
1234         mutex_unlock(&c_node->mem_lock);
1235
1236         DRM_DEBUG_KMS("cmd[%d]\n", property->cmd);
1237
1238         /* start operations */
1239         if (ippdrv->start) {
1240                 ret = ippdrv->start(ippdrv->dev, property->cmd);
1241                 if (ret) {
1242                         DRM_ERROR("failed to start ops.\n");
1243                         ippdrv->c_node = NULL;
1244                         return ret;
1245                 }
1246         }
1247
1248         return 0;
1249
1250 err_unlock:
1251         mutex_unlock(&c_node->mem_lock);
1252         ippdrv->c_node = NULL;
1253         return ret;
1254 }
1255
1256 static int ipp_stop_property(struct drm_device *drm_dev,
1257                 struct exynos_drm_ippdrv *ippdrv,
1258                 struct drm_exynos_ipp_cmd_node *c_node)
1259 {
1260         struct drm_exynos_ipp_property *property = &c_node->property;
1261         int i;
1262
1263         DRM_DEBUG_KMS("prop_id[%d]\n", property->prop_id);
1264
1265         /* stop operations */
1266         if (ippdrv->stop)
1267                 ippdrv->stop(ippdrv->dev, property->cmd);
1268
1269         /* check command */
1270         switch (property->cmd) {
1271         case IPP_CMD_M2M:
1272                 for_each_ipp_ops(i)
1273                         ipp_clean_mem_nodes(drm_dev, c_node, i);
1274                 break;
1275         case IPP_CMD_WB:
1276                 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_DST);
1277                 break;
1278         case IPP_CMD_OUTPUT:
1279                 ipp_clean_mem_nodes(drm_dev, c_node, EXYNOS_DRM_OPS_SRC);
1280                 break;
1281         default:
1282                 DRM_ERROR("invalid operations.\n");
1283                 return -EINVAL;
1284         }
1285
1286         return 0;
1287 }
1288
1289 void ipp_sched_cmd(struct work_struct *work)
1290 {
1291         struct drm_exynos_ipp_cmd_work *cmd_work =
1292                 container_of(work, struct drm_exynos_ipp_cmd_work, work);
1293         struct exynos_drm_ippdrv *ippdrv;
1294         struct drm_exynos_ipp_cmd_node *c_node;
1295         struct drm_exynos_ipp_property *property;
1296         int ret;
1297
1298         ippdrv = cmd_work->ippdrv;
1299         if (!ippdrv) {
1300                 DRM_ERROR("invalid ippdrv list.\n");
1301                 return;
1302         }
1303
1304         c_node = cmd_work->c_node;
1305         if (!c_node) {
1306                 DRM_ERROR("invalid command node list.\n");
1307                 return;
1308         }
1309
1310         mutex_lock(&c_node->lock);
1311
1312         property = &c_node->property;
1313
1314         switch (cmd_work->ctrl) {
1315         case IPP_CTRL_PLAY:
1316         case IPP_CTRL_RESUME:
1317                 ret = ipp_start_property(ippdrv, c_node);
1318                 if (ret) {
1319                         DRM_ERROR("failed to start property:prop_id[%d]\n",
1320                                 c_node->property.prop_id);
1321                         goto err_unlock;
1322                 }
1323
1324                 /*
1325                  * M2M case supports wait_completion of transfer.
1326                  * because M2M case supports single unit operation
1327                  * with multiple queue.
1328                  * M2M need to wait completion of data transfer.
1329                  */
1330                 if (ipp_is_m2m_cmd(property->cmd)) {
1331                         if (!wait_for_completion_timeout
1332                             (&c_node->start_complete, msecs_to_jiffies(200))) {
1333                                 DRM_ERROR("timeout event:prop_id[%d]\n",
1334                                         c_node->property.prop_id);
1335                                 goto err_unlock;
1336                         }
1337                 }
1338                 break;
1339         case IPP_CTRL_STOP:
1340         case IPP_CTRL_PAUSE:
1341                 ret = ipp_stop_property(ippdrv->drm_dev, ippdrv,
1342                         c_node);
1343                 if (ret) {
1344                         DRM_ERROR("failed to stop property.\n");
1345                         goto err_unlock;
1346                 }
1347
1348                 complete(&c_node->stop_complete);
1349                 break;
1350         default:
1351                 DRM_ERROR("unknown control type\n");
1352                 break;
1353         }
1354
1355         DRM_DEBUG_KMS("ctrl[%d] done.\n", cmd_work->ctrl);
1356
1357 err_unlock:
1358         mutex_unlock(&c_node->lock);
1359 }
1360
1361 static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
1362                 struct drm_exynos_ipp_cmd_node *c_node, int *buf_id)
1363 {
1364         struct drm_device *drm_dev = ippdrv->drm_dev;
1365         struct drm_exynos_ipp_property *property = &c_node->property;
1366         struct drm_exynos_ipp_mem_node *m_node;
1367         struct drm_exynos_ipp_queue_buf qbuf;
1368         struct drm_exynos_ipp_send_event *e;
1369         struct list_head *head;
1370         struct timeval now;
1371         unsigned long flags;
1372         u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, };
1373         int ret, i;
1374
1375         for_each_ipp_ops(i)
1376                 DRM_DEBUG_KMS("%s buf_id[%d]\n", i ? "dst" : "src", buf_id[i]);
1377
1378         if (!drm_dev) {
1379                 DRM_ERROR("failed to get drm_dev.\n");
1380                 return -EINVAL;
1381         }
1382
1383         if (!property) {
1384                 DRM_ERROR("failed to get property.\n");
1385                 return -EINVAL;
1386         }
1387
1388         mutex_lock(&c_node->event_lock);
1389         if (list_empty(&c_node->event_list)) {
1390                 DRM_DEBUG_KMS("event list is empty.\n");
1391                 ret = 0;
1392                 goto err_event_unlock;
1393         }
1394
1395         mutex_lock(&c_node->mem_lock);
1396         if (!ipp_check_mem_list(c_node)) {
1397                 DRM_DEBUG_KMS("empty memory.\n");
1398                 ret = 0;
1399                 goto err_mem_unlock;
1400         }
1401
1402         /* check command */
1403         switch (property->cmd) {
1404         case IPP_CMD_M2M:
1405                 for_each_ipp_ops(i) {
1406                         /* source/destination memory list */
1407                         head = &c_node->mem_list[i];
1408
1409                         m_node = list_first_entry(head,
1410                                 struct drm_exynos_ipp_mem_node, list);
1411
1412                         tbuf_id[i] = m_node->buf_id;
1413                         DRM_DEBUG_KMS("%s buf_id[%d]\n",
1414                                 i ? "dst" : "src", tbuf_id[i]);
1415
1416                         ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1417                         if (ret)
1418                                 DRM_ERROR("failed to put m_node.\n");
1419                 }
1420                 break;
1421         case IPP_CMD_WB:
1422                 /* clear buf for finding */
1423                 memset(&qbuf, 0x0, sizeof(qbuf));
1424                 qbuf.ops_id = EXYNOS_DRM_OPS_DST;
1425                 qbuf.buf_id = buf_id[EXYNOS_DRM_OPS_DST];
1426
1427                 /* get memory node entry */
1428                 m_node = ipp_find_mem_node(c_node, &qbuf);
1429                 if (!m_node) {
1430                         DRM_ERROR("empty memory node.\n");
1431                         ret = -ENOMEM;
1432                         goto err_mem_unlock;
1433                 }
1434
1435                 tbuf_id[EXYNOS_DRM_OPS_DST] = m_node->buf_id;
1436
1437                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1438                 if (ret)
1439                         DRM_ERROR("failed to put m_node.\n");
1440                 break;
1441         case IPP_CMD_OUTPUT:
1442                 /* source memory list */
1443                 head = &c_node->mem_list[EXYNOS_DRM_OPS_SRC];
1444
1445                 m_node = list_first_entry(head,
1446                         struct drm_exynos_ipp_mem_node, list);
1447
1448                 tbuf_id[EXYNOS_DRM_OPS_SRC] = m_node->buf_id;
1449
1450                 ret = ipp_put_mem_node(drm_dev, c_node, m_node);
1451                 if (ret)
1452                         DRM_ERROR("failed to put m_node.\n");
1453                 break;
1454         default:
1455                 DRM_ERROR("invalid operations.\n");
1456                 ret = -EINVAL;
1457                 goto err_mem_unlock;
1458         }
1459         mutex_unlock(&c_node->mem_lock);
1460
1461         if (tbuf_id[EXYNOS_DRM_OPS_DST] != buf_id[EXYNOS_DRM_OPS_DST])
1462                 DRM_ERROR("failed to match buf_id[%d %d]prop_id[%d]\n",
1463                         tbuf_id[1], buf_id[1], property->prop_id);
1464
1465         /*
1466          * command node have event list of destination buffer
1467          * If destination buffer enqueue to mem list,
1468          * then we make event and link to event list tail.
1469          * so, we get first event for first enqueued buffer.
1470          */
1471         e = list_first_entry(&c_node->event_list,
1472                 struct drm_exynos_ipp_send_event, base.link);
1473
1474         do_gettimeofday(&now);
1475         DRM_DEBUG_KMS("tv_sec[%ld]tv_usec[%ld]\n", now.tv_sec, now.tv_usec);
1476         e->event.tv_sec = now.tv_sec;
1477         e->event.tv_usec = now.tv_usec;
1478         e->event.prop_id = property->prop_id;
1479
1480         /* set buffer id about source destination */
1481         for_each_ipp_ops(i)
1482                 e->event.buf_id[i] = tbuf_id[i];
1483
1484         spin_lock_irqsave(&drm_dev->event_lock, flags);
1485         list_move_tail(&e->base.link, &e->base.file_priv->event_list);
1486         wake_up_interruptible(&e->base.file_priv->event_wait);
1487         spin_unlock_irqrestore(&drm_dev->event_lock, flags);
1488         mutex_unlock(&c_node->event_lock);
1489
1490         DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
1491                 property->cmd, property->prop_id, tbuf_id[EXYNOS_DRM_OPS_DST]);
1492
1493         return 0;
1494
1495 err_mem_unlock:
1496         mutex_unlock(&c_node->mem_lock);
1497 err_event_unlock:
1498         mutex_unlock(&c_node->event_lock);
1499         return ret;
1500 }
1501
1502 void ipp_sched_event(struct work_struct *work)
1503 {
1504         struct drm_exynos_ipp_event_work *event_work =
1505                 container_of(work, struct drm_exynos_ipp_event_work, work);
1506         struct exynos_drm_ippdrv *ippdrv;
1507         struct drm_exynos_ipp_cmd_node *c_node;
1508         int ret;
1509
1510         if (!event_work) {
1511                 DRM_ERROR("failed to get event_work.\n");
1512                 return;
1513         }
1514
1515         DRM_DEBUG_KMS("buf_id[%d]\n", event_work->buf_id[EXYNOS_DRM_OPS_DST]);
1516
1517         ippdrv = event_work->ippdrv;
1518         if (!ippdrv) {
1519                 DRM_ERROR("failed to get ipp driver.\n");
1520                 return;
1521         }
1522
1523         c_node = ippdrv->c_node;
1524         if (!c_node) {
1525                 DRM_ERROR("failed to get command node.\n");
1526                 return;
1527         }
1528
1529         /*
1530          * IPP supports command thread, event thread synchronization.
1531          * If IPP close immediately from user land, then IPP make
1532          * synchronization with command thread, so make complete event.
1533          * or going out operations.
1534          */
1535         if (c_node->state != IPP_STATE_START) {
1536                 DRM_DEBUG_KMS("bypass state[%d]prop_id[%d]\n",
1537                         c_node->state, c_node->property.prop_id);
1538                 goto err_completion;
1539         }
1540
1541         ret = ipp_send_event(ippdrv, c_node, event_work->buf_id);
1542         if (ret) {
1543                 DRM_ERROR("failed to send event.\n");
1544                 goto err_completion;
1545         }
1546
1547 err_completion:
1548         if (ipp_is_m2m_cmd(c_node->property.cmd))
1549                 complete(&c_node->start_complete);
1550 }
1551
1552 static int ipp_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
1553 {
1554         struct ipp_context *ctx = get_ipp_context(dev);
1555         struct exynos_drm_ippdrv *ippdrv;
1556         int ret, count = 0;
1557
1558         /* get ipp driver entry */
1559         list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1560                 ippdrv->drm_dev = drm_dev;
1561
1562                 ret = ipp_create_id(&ctx->ipp_idr, &ctx->ipp_lock, ippdrv);
1563                 if (ret < 0) {
1564                         DRM_ERROR("failed to create id.\n");
1565                         goto err;
1566                 }
1567                 ippdrv->prop_list.ipp_id = ret;
1568
1569                 DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]ipp_id[%d]\n",
1570                         count++, (int)ippdrv, ret);
1571
1572                 /* store parent device for node */
1573                 ippdrv->parent_dev = dev;
1574
1575                 /* store event work queue and handler */
1576                 ippdrv->event_workq = ctx->event_workq;
1577                 ippdrv->sched_event = ipp_sched_event;
1578                 INIT_LIST_HEAD(&ippdrv->cmd_list);
1579                 mutex_init(&ippdrv->cmd_lock);
1580
1581                 if (is_drm_iommu_supported(drm_dev)) {
1582                         ret = drm_iommu_attach_device(drm_dev, ippdrv->dev);
1583                         if (ret) {
1584                                 DRM_ERROR("failed to activate iommu\n");
1585                                 goto err;
1586                         }
1587                 }
1588         }
1589
1590         return 0;
1591
1592 err:
1593         /* get ipp driver entry */
1594         list_for_each_entry_continue_reverse(ippdrv, &exynos_drm_ippdrv_list,
1595                                                 drv_list) {
1596                 if (is_drm_iommu_supported(drm_dev))
1597                         drm_iommu_detach_device(drm_dev, ippdrv->dev);
1598
1599                 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1600                                 ippdrv->prop_list.ipp_id);
1601         }
1602
1603         return ret;
1604 }
1605
1606 static void ipp_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
1607 {
1608         struct exynos_drm_ippdrv *ippdrv, *t;
1609         struct ipp_context *ctx = get_ipp_context(dev);
1610
1611         /* get ipp driver entry */
1612         list_for_each_entry_safe(ippdrv, t, &exynos_drm_ippdrv_list, drv_list) {
1613                 if (is_drm_iommu_supported(drm_dev))
1614                         drm_iommu_detach_device(drm_dev, ippdrv->dev);
1615
1616                 ipp_remove_id(&ctx->ipp_idr, &ctx->ipp_lock,
1617                                 ippdrv->prop_list.ipp_id);
1618
1619                 ippdrv->drm_dev = NULL;
1620                 exynos_drm_ippdrv_unregister(ippdrv);
1621         }
1622 }
1623
1624 static int ipp_subdrv_open(struct drm_device *drm_dev, struct device *dev,
1625                 struct drm_file *file)
1626 {
1627         struct drm_exynos_file_private *file_priv = file->driver_priv;
1628
1629         file_priv->ipp_dev = dev;
1630
1631         DRM_DEBUG_KMS("done priv[0x%x]\n", (int)dev);
1632
1633         return 0;
1634 }
1635
1636 static void ipp_subdrv_close(struct drm_device *drm_dev, struct device *dev,
1637                 struct drm_file *file)
1638 {
1639         struct exynos_drm_ippdrv *ippdrv = NULL;
1640         struct ipp_context *ctx = get_ipp_context(dev);
1641         struct drm_exynos_ipp_cmd_node *c_node, *tc_node;
1642         int count = 0;
1643
1644         list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
1645                 mutex_lock(&ippdrv->cmd_lock);
1646                 list_for_each_entry_safe(c_node, tc_node,
1647                         &ippdrv->cmd_list, list) {
1648                         DRM_DEBUG_KMS("count[%d]ippdrv[0x%x]\n",
1649                                 count++, (int)ippdrv);
1650
1651                         if (c_node->filp == file) {
1652                                 /*
1653                                  * userland goto unnormal state. process killed.
1654                                  * and close the file.
1655                                  * so, IPP didn't called stop cmd ctrl.
1656                                  * so, we are make stop operation in this state.
1657                                  */
1658                                 if (c_node->state == IPP_STATE_START) {
1659                                         ipp_stop_property(drm_dev, ippdrv,
1660                                                 c_node);
1661                                         c_node->state = IPP_STATE_STOP;
1662                                 }
1663
1664                                 ippdrv->dedicated = false;
1665                                 ipp_clean_cmd_node(ctx, c_node);
1666                                 if (list_empty(&ippdrv->cmd_list))
1667                                         pm_runtime_put_sync(ippdrv->dev);
1668                         }
1669                 }
1670                 mutex_unlock(&ippdrv->cmd_lock);
1671         }
1672
1673         return;
1674 }
1675
1676 static int ipp_probe(struct platform_device *pdev)
1677 {
1678         struct device *dev = &pdev->dev;
1679         struct ipp_context *ctx;
1680         struct exynos_drm_subdrv *subdrv;
1681         int ret;
1682
1683         ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1684         if (!ctx)
1685                 return -ENOMEM;
1686
1687         mutex_init(&ctx->ipp_lock);
1688         mutex_init(&ctx->prop_lock);
1689
1690         idr_init(&ctx->ipp_idr);
1691         idr_init(&ctx->prop_idr);
1692
1693         /*
1694          * create single thread for ipp event
1695          * IPP supports event thread for IPP drivers.
1696          * IPP driver send event_work to this thread.
1697          * and IPP event thread send event to user process.
1698          */
1699         ctx->event_workq = create_singlethread_workqueue("ipp_event");
1700         if (!ctx->event_workq) {
1701                 dev_err(dev, "failed to create event workqueue\n");
1702                 return -EINVAL;
1703         }
1704
1705         /*
1706          * create single thread for ipp command
1707          * IPP supports command thread for user process.
1708          * user process make command node using set property ioctl.
1709          * and make start_work and send this work to command thread.
1710          * and then this command thread start property.
1711          */
1712         ctx->cmd_workq = create_singlethread_workqueue("ipp_cmd");
1713         if (!ctx->cmd_workq) {
1714                 dev_err(dev, "failed to create cmd workqueue\n");
1715                 ret = -EINVAL;
1716                 goto err_event_workq;
1717         }
1718
1719         /* set sub driver informations */
1720         subdrv = &ctx->subdrv;
1721         subdrv->dev = dev;
1722         subdrv->probe = ipp_subdrv_probe;
1723         subdrv->remove = ipp_subdrv_remove;
1724         subdrv->open = ipp_subdrv_open;
1725         subdrv->close = ipp_subdrv_close;
1726
1727         platform_set_drvdata(pdev, ctx);
1728
1729         ret = exynos_drm_subdrv_register(subdrv);
1730         if (ret < 0) {
1731                 DRM_ERROR("failed to register drm ipp device.\n");
1732                 goto err_cmd_workq;
1733         }
1734
1735         dev_info(dev, "drm ipp registered successfully.\n");
1736
1737         return 0;
1738
1739 err_cmd_workq:
1740         destroy_workqueue(ctx->cmd_workq);
1741 err_event_workq:
1742         destroy_workqueue(ctx->event_workq);
1743         return ret;
1744 }
1745
1746 static int ipp_remove(struct platform_device *pdev)
1747 {
1748         struct ipp_context *ctx = platform_get_drvdata(pdev);
1749
1750         /* unregister sub driver */
1751         exynos_drm_subdrv_unregister(&ctx->subdrv);
1752
1753         /* remove,destroy ipp idr */
1754         idr_destroy(&ctx->ipp_idr);
1755         idr_destroy(&ctx->prop_idr);
1756
1757         mutex_destroy(&ctx->ipp_lock);
1758         mutex_destroy(&ctx->prop_lock);
1759
1760         /* destroy command, event work queue */
1761         destroy_workqueue(ctx->cmd_workq);
1762         destroy_workqueue(ctx->event_workq);
1763
1764         return 0;
1765 }
1766
1767 struct platform_driver ipp_driver = {
1768         .probe          = ipp_probe,
1769         .remove         = ipp_remove,
1770         .driver         = {
1771                 .name   = "exynos-drm-ipp",
1772                 .owner  = THIS_MODULE,
1773         },
1774 };
1775