drivers/gpu/drm/exynos/exynos_drm_ipp.c

   1 /*
   2  * Copyright (C) 2017 Samsung Electronics Co.Ltd
   3  * Authors:
   4  *      Marek Szyprowski <m.szyprowski@samsung.com>
   5  *
   6  * Exynos DRM Image Post Processing (IPP) related functions
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  */
  18
  19
  20 #include <drm/drmP.h>
  21 #include <drm/drm_mode.h>
  22 #include <uapi/drm/exynos_drm.h>
  23
  24 #include "exynos_drm_drv.h"
  25 #include "exynos_drm_gem.h"
  26 #include "exynos_drm_ipp.h"
  27
  28 static int num_ipp;
  29 static LIST_HEAD(ipp_list);
  30
  31 /**
  32  * exynos_drm_ipp_register - Register a new picture processor hardware module
  33  * @dev: DRM device
  34  * @ipp: ipp module to init
  35  * @funcs: callbacks for the new ipp object
  36  * @caps: bitmask of ipp capabilities (%DRM_EXYNOS_IPP_CAP_*)
  37  * @formats: array of supported formats
  38  * @num_formats: size of the supported formats array
  39  * @name: name (for debugging purposes)
  40  *
  41  * Initializes a ipp module.
  42  *
  43  * Returns:
  44  * Zero on success, error code on failure.
  45  */
  46 int exynos_drm_ipp_register(struct drm_device *dev, struct exynos_drm_ipp *ipp,
  47                 const struct exynos_drm_ipp_funcs *funcs, unsigned int caps,
  48                 const struct exynos_drm_ipp_formats *formats,
  49                 unsigned int num_formats, const char *name)
  50 {
  51         WARN_ON(!ipp);
  52         WARN_ON(!funcs);
  53         WARN_ON(!formats);
  54         WARN_ON(!num_formats);
  55
  56         spin_lock_init(&ipp->lock);
  57         INIT_LIST_HEAD(&ipp->todo_list);
  58         init_waitqueue_head(&ipp->done_wq);
  59         ipp->dev = dev;
  60         ipp->funcs = funcs;
  61         ipp->capabilities = caps;
  62         ipp->name = name;
  63         ipp->formats = formats;
  64         ipp->num_formats = num_formats;
  65
  66         /* ipp_list modification is serialized by component framework */
  67         list_add_tail(&ipp->head, &ipp_list);
  68         ipp->id = num_ipp++;
  69
  70         DRM_DEBUG_DRIVER("Registered ipp %d\n", ipp->id);
  71
  72         return 0;
  73 }
  74
  75 /**
  76  * exynos_drm_ipp_unregister - Unregister the picture processor module
  77  * @dev: DRM device
  78  * @ipp: ipp module
  79  */
  80 void exynos_drm_ipp_unregister(struct drm_device *dev,
  81                                struct exynos_drm_ipp *ipp)
  82 {
  83         WARN_ON(ipp->task);
  84         WARN_ON(!list_empty(&ipp->todo_list));
  85         list_del(&ipp->head);
  86 }
  87
  88 /**
  89  * exynos_drm_ipp_ioctl_get_res_ioctl - enumerate all ipp modules
  90  * @dev: DRM device
  91  * @data: ioctl data
  92  * @file_priv: DRM file info
  93  *
  94  * Construct a list of ipp ids.
  95  *
  96  * Called by the user via ioctl.
  97  *
  98  * Returns:
  99  * Zero on success, negative errno on failure.
 100  */
 101 int exynos_drm_ipp_get_res_ioctl(struct drm_device *dev, void *data,
 102                                  struct drm_file *file_priv)
 103 {
 104         struct drm_exynos_ioctl_ipp_get_res *resp = data;
 105         struct exynos_drm_ipp *ipp;
 106         uint32_t __user *ipp_ptr = (uint32_t __user *)
 107                                                 (unsigned long)resp->ipp_id_ptr;
 108         unsigned int count = num_ipp, copied = 0;
 109
 110         /*
 111          * This ioctl is called twice, once to determine how much space is
 112          * needed, and the 2nd time to fill it.
 113          */
 114         if (count && resp->count_ipps >= count) {
 115                 list_for_each_entry(ipp, &ipp_list, head) {
 116                         if (put_user(ipp->id, ipp_ptr + copied))
 117                                 return -EFAULT;
 118                         copied++;
 119                 }
 120         }
 121         resp->count_ipps = count;
 122
 123         return 0;
 124 }
 125
 126 static inline struct exynos_drm_ipp *__ipp_get(uint32_t id)
 127 {
 128         struct exynos_drm_ipp *ipp;
 129
 130         list_for_each_entry(ipp, &ipp_list, head)
 131                 if (ipp->id == id)
 132                         return ipp;
 133         return NULL;
 134 }
 135
 136 /**
 137  * exynos_drm_ipp_ioctl_get_caps - get ipp module capabilities and formats
 138  * @dev: DRM device
 139  * @data: ioctl data
 140  * @file_priv: DRM file info
 141  *
 142  * Construct a structure describing ipp module capabilities.
 143  *
 144  * Called by the user via ioctl.
 145  *
 146  * Returns:
 147  * Zero on success, negative errno on failure.
 148  */
 149 int exynos_drm_ipp_get_caps_ioctl(struct drm_device *dev, void *data,
 150                                   struct drm_file *file_priv)
 151 {
 152         struct drm_exynos_ioctl_ipp_get_caps *resp = data;
 153         void __user *ptr = (void __user *)(unsigned long)resp->formats_ptr;
 154         struct exynos_drm_ipp *ipp;
 155         int i;
 156
 157         ipp = __ipp_get(resp->ipp_id);
 158         if (!ipp)
 159                 return -ENOENT;
 160
 161         resp->ipp_id = ipp->id;
 162         resp->capabilities = ipp->capabilities;
 163
 164         /*
 165          * This ioctl is called twice, once to determine how much space is
 166          * needed, and the 2nd time to fill it.
 167          */
 168         if (resp->formats_count >= ipp->num_formats) {
 169                 for (i = 0; i < ipp->num_formats; i++) {
 170                         struct drm_exynos_ipp_format tmp = {
 171                                 .fourcc = ipp->formats[i].fourcc,
 172                                 .type = ipp->formats[i].type,
 173                                 .modifier = ipp->formats[i].modifier,
 174                         };
 175
 176                         if (copy_to_user(ptr, &tmp, sizeof(tmp)))
 177                                 return -EFAULT;
 178                         ptr += sizeof(tmp);
 179                 }
 180         }
 181         resp->formats_count = ipp->num_formats;
 182
 183         return 0;
 184 }
 185
 186 static inline const struct exynos_drm_ipp_formats *__ipp_format_get(
 187                                 struct exynos_drm_ipp *ipp, uint32_t fourcc,
 188                                 uint64_t mod, unsigned int type)
 189 {
 190         int i;
 191
 192         for (i = 0; i < ipp->num_formats; i++) {
 193                 if ((ipp->formats[i].type & type) &&
 194                     ipp->formats[i].fourcc == fourcc &&
 195                     ipp->formats[i].modifier == mod)
 196                         return &ipp->formats[i];
 197         }
 198         return NULL;
 199 }
 200
 201 /**
 202  * exynos_drm_ipp_get_limits_ioctl - get ipp module limits
 203  * @dev: DRM device
 204  * @data: ioctl data
 205  * @file_priv: DRM file info
 206  *
 207  * Construct a structure describing ipp module limitations for provided
 208  * picture format.
 209  *
 210  * Called by the user via ioctl.
 211  *
 212  * Returns:
 213  * Zero on success, negative errno on failure.
 214  */
 215 int exynos_drm_ipp_get_limits_ioctl(struct drm_device *dev, void *data,
 216                                     struct drm_file *file_priv)
 217 {
 218         struct drm_exynos_ioctl_ipp_get_limits *resp = data;
 219         void __user *ptr = (void __user *)(unsigned long)resp->limits_ptr;
 220         const struct exynos_drm_ipp_formats *format;
 221         struct exynos_drm_ipp *ipp;
 222
 223         if (resp->type != DRM_EXYNOS_IPP_FORMAT_SOURCE &&
 224             resp->type != DRM_EXYNOS_IPP_FORMAT_DESTINATION)
 225                 return -EINVAL;
 226
 227         ipp = __ipp_get(resp->ipp_id);
 228         if (!ipp)
 229                 return -ENOENT;
 230
 231         format = __ipp_format_get(ipp, resp->fourcc, resp->modifier,
 232                                   resp->type);
 233         if (!format)
 234                 return -EINVAL;
 235
 236         /*
 237          * This ioctl is called twice, once to determine how much space is
 238          * needed, and the 2nd time to fill it.
 239          */
 240         if (format->num_limits && resp->limits_count >= format->num_limits)
 241                 if (copy_to_user((void __user *)ptr, format->limits,
 242                                  sizeof(*format->limits) * format->num_limits))
 243                         return -EFAULT;
 244         resp->limits_count = format->num_limits;
 245
 246         return 0;
 247 }
 248
 249 struct drm_pending_exynos_ipp_event {
 250         struct drm_pending_event base;
 251         struct drm_exynos_ipp_event event;
 252 };
 253
 254 static inline struct exynos_drm_ipp_task *
 255                         exynos_drm_ipp_task_alloc(struct exynos_drm_ipp *ipp)
 256 {
 257         struct exynos_drm_ipp_task *task;
 258
 259         task = kzalloc(sizeof(*task), GFP_KERNEL);
 260         if (!task)
 261                 return NULL;
 262
 263         task->dev = ipp->dev;
 264         task->ipp = ipp;
 265
 266         /* some defaults */
 267         task->src.rect.w = task->dst.rect.w = UINT_MAX;
 268         task->src.rect.h = task->dst.rect.h = UINT_MAX;
 269         task->transform.rotation = DRM_MODE_ROTATE_0;
 270
 271         DRM_DEBUG_DRIVER("Allocated task %pK\n", task);
 272
 273         return task;
 274 }
 275
 276 static const struct exynos_drm_param_map {
 277         unsigned int id;
 278         unsigned int size;
 279         unsigned int offset;
 280 } exynos_drm_ipp_params_maps[] = {
 281         {
 282                 DRM_EXYNOS_IPP_TASK_BUFFER | DRM_EXYNOS_IPP_TASK_TYPE_SOURCE,
 283                 sizeof(struct drm_exynos_ipp_task_buffer),
 284                 offsetof(struct exynos_drm_ipp_task, src.buf),
 285         }, {
 286                 DRM_EXYNOS_IPP_TASK_BUFFER |
 287                         DRM_EXYNOS_IPP_TASK_TYPE_DESTINATION,
 288                 sizeof(struct drm_exynos_ipp_task_buffer),
 289                 offsetof(struct exynos_drm_ipp_task, dst.buf),
 290         }, {
 291                 DRM_EXYNOS_IPP_TASK_RECTANGLE | DRM_EXYNOS_IPP_TASK_TYPE_SOURCE,
 292                 sizeof(struct drm_exynos_ipp_task_rect),
 293                 offsetof(struct exynos_drm_ipp_task, src.rect),
 294         }, {
 295                 DRM_EXYNOS_IPP_TASK_RECTANGLE |
 296                         DRM_EXYNOS_IPP_TASK_TYPE_DESTINATION,
 297                 sizeof(struct drm_exynos_ipp_task_rect),
 298                 offsetof(struct exynos_drm_ipp_task, dst.rect),
 299         }, {
 300                 DRM_EXYNOS_IPP_TASK_TRANSFORM,
 301                 sizeof(struct drm_exynos_ipp_task_transform),
 302                 offsetof(struct exynos_drm_ipp_task, transform),
 303         }, {
 304                 DRM_EXYNOS_IPP_TASK_ALPHA,
 305                 sizeof(struct drm_exynos_ipp_task_alpha),
 306                 offsetof(struct exynos_drm_ipp_task, alpha),
 307         },
 308 };
 309
 310 static int exynos_drm_ipp_task_set(struct exynos_drm_ipp_task *task,
 311                                    struct drm_exynos_ioctl_ipp_commit *arg)
 312 {
 313         const struct exynos_drm_param_map *map = exynos_drm_ipp_params_maps;
 314         void __user *params = (void __user *)(unsigned long)arg->params_ptr;
 315         unsigned int size = arg->params_size;
 316         uint32_t id;
 317         int i;
 318
 319         while (size) {
 320                 if (get_user(id, (uint32_t __user *)params))
 321                         return -EFAULT;
 322
 323                 for (i = 0; i < ARRAY_SIZE(exynos_drm_ipp_params_maps); i++)
 324                         if (map[i].id == id)
 325                                 break;
 326                 if (i == ARRAY_SIZE(exynos_drm_ipp_params_maps) ||
 327                     map[i].size > size)
 328                         return -EINVAL;
 329
 330                 if (copy_from_user((void *)task + map[i].offset, params,
 331                                    map[i].size))
 332                         return -EFAULT;
 333
 334                 params += map[i].size;
 335                 size -= map[i].size;
 336         }
 337
 338         DRM_DEBUG_DRIVER("Got task %pK configuration from userspace\n", task);
 339         return 0;
 340 }
 341
 342 static int exynos_drm_ipp_task_setup_buffer(struct exynos_drm_ipp_buffer *buf,
 343                                             struct drm_file *filp)
 344 {
 345         int ret = 0;
 346         int i;
 347
 348         /* basic checks */
 349         if (buf->buf.width == 0 || buf->buf.height == 0)
 350                 return -EINVAL;
 351         buf->format = drm_format_info(buf->buf.fourcc);
 352         for (i = 0; i < buf->format->num_planes; i++) {
 353                 unsigned int width = (i == 0) ? buf->buf.width :
 354                              DIV_ROUND_UP(buf->buf.width, buf->format->hsub);
 355
 356                 if (buf->buf.pitch[i] == 0)
 357                         buf->buf.pitch[i] = width * buf->format->cpp[i];
 358                 if (buf->buf.pitch[i] < width * buf->format->cpp[i])
 359                         return -EINVAL;
 360                 if (!buf->buf.gem_id[i])
 361                         return -ENOENT;
 362         }
 363
 364         /* pitch for additional planes must match */
 365         if (buf->format->num_planes > 2 &&
 366             buf->buf.pitch[1] != buf->buf.pitch[2])
 367                 return -EINVAL;
 368
 369         /* get GEM buffers and check their size */
 370         for (i = 0; i < buf->format->num_planes; i++) {
 371                 unsigned int height = (i == 0) ? buf->buf.height :
 372                              DIV_ROUND_UP(buf->buf.height, buf->format->vsub);
 373                 unsigned long size = height * buf->buf.pitch[i];
 374                 struct drm_gem_object *obj = drm_gem_object_lookup(filp,
 375                                                             buf->buf.gem_id[i]);
 376                 if (!obj) {
 377                         ret = -ENOENT;
 378                         goto gem_free;
 379                 }
 380                 buf->exynos_gem[i] = to_exynos_gem(obj);
 381
 382                 if (size + buf->buf.offset[i] > buf->exynos_gem[i]->size) {
 383                         i++;
 384                         ret = -EINVAL;
 385                         goto gem_free;
 386                 }
 387                 buf->dma_addr[i] = buf->exynos_gem[i]->dma_addr +
 388                                    buf->buf.offset[i];
 389         }
 390
 391         return 0;
 392 gem_free:
 393         while (i--) {
 394                 drm_gem_object_put_unlocked(&buf->exynos_gem[i]->base);
 395                 buf->exynos_gem[i] = NULL;
 396         }
 397         return ret;
 398 }
 399
 400 static void exynos_drm_ipp_task_release_buf(struct exynos_drm_ipp_buffer *buf)
 401 {
 402         int i;
 403
 404         if (!buf->exynos_gem[0])
 405                 return;
 406         for (i = 0; i < buf->format->num_planes; i++)
 407                 drm_gem_object_put_unlocked(&buf->exynos_gem[i]->base);
 408 }
 409
 410 static void exynos_drm_ipp_task_free(struct exynos_drm_ipp *ipp,
 411                                  struct exynos_drm_ipp_task *task)
 412 {
 413         DRM_DEBUG_DRIVER("Freeing task %pK\n", task);
 414
 415         exynos_drm_ipp_task_release_buf(&task->src);
 416         exynos_drm_ipp_task_release_buf(&task->dst);
 417         if (task->event)
 418                 drm_event_cancel_free(ipp->dev, &task->event->base);
 419         kfree(task);
 420 }
 421
 422 struct drm_ipp_limit {
 423         struct drm_exynos_ipp_limit_val h;
 424         struct drm_exynos_ipp_limit_val v;
 425 };
 426
 427 enum drm_ipp_size_id {
 428         IPP_LIMIT_BUFFER, IPP_LIMIT_AREA, IPP_LIMIT_ROTATED, IPP_LIMIT_MAX
 429 };
 430
 431 static const enum drm_ipp_size_id limit_id_fallback[IPP_LIMIT_MAX][4] = {
 432         [IPP_LIMIT_BUFFER]  = { DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 433         [IPP_LIMIT_AREA]    = { DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
 434                                 DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 435         [IPP_LIMIT_ROTATED] = { DRM_EXYNOS_IPP_LIMIT_SIZE_ROTATED,
 436                                 DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
 437                                 DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 438 };
 439
 440 static inline void __limit_set_val(unsigned int *ptr, unsigned int val)
 441 {
 442         if (!*ptr)
 443                 *ptr = val;
 444 }
 445
 446 static void __get_size_limit(const struct drm_exynos_ipp_limit *limits,
 447                              unsigned int num_limits, enum drm_ipp_size_id id,
 448                              struct drm_ipp_limit *res)
 449 {
 450         const struct drm_exynos_ipp_limit *l = limits;
 451         int i = 0;
 452
 453         memset(res, 0, sizeof(*res));
 454         for (i = 0; limit_id_fallback[id][i]; i++)
 455                 for (l = limits; l - limits < num_limits; l++) {
 456                         if (((l->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) !=
 457                               DRM_EXYNOS_IPP_LIMIT_TYPE_SIZE) ||
 458                             ((l->type & DRM_EXYNOS_IPP_LIMIT_SIZE_MASK) !=
 459                                                      limit_id_fallback[id][i]))
 460                                 continue;
 461                         __limit_set_val(&res->h.min, l->h.min);
 462                         __limit_set_val(&res->h.max, l->h.max);
 463                         __limit_set_val(&res->h.align, l->h.align);
 464                         __limit_set_val(&res->v.min, l->v.min);
 465                         __limit_set_val(&res->v.max, l->v.max);
 466                         __limit_set_val(&res->v.align, l->v.align);
 467                 }
 468 }
 469
 470 static inline bool __align_check(unsigned int val, unsigned int align)
 471 {
 472         if (align && (val & (align - 1))) {
 473                 DRM_DEBUG_DRIVER("Value %d exceeds HW limits (align %d)\n",
 474                                  val, align);
 475                 return false;
 476         }
 477         return true;
 478 }
 479
 480 static inline bool __size_limit_check(unsigned int val,
 481                                  struct drm_exynos_ipp_limit_val *l)
 482 {
 483         if ((l->min && val < l->min) || (l->max && val > l->max)) {
 484                 DRM_DEBUG_DRIVER("Value %d exceeds HW limits (min %d, max %d)\n",
 485                                  val, l->min, l->max);
 486                 return false;
 487         }
 488         return __align_check(val, l->align);
 489 }
 490
 491 static int exynos_drm_ipp_check_size_limits(struct exynos_drm_ipp_buffer *buf,
 492         const struct drm_exynos_ipp_limit *limits, unsigned int num_limits,
 493         bool rotate, bool swap)
 494 {
 495         enum drm_ipp_size_id id = rotate ? IPP_LIMIT_ROTATED : IPP_LIMIT_AREA;
 496         struct drm_ipp_limit l;
 497         struct drm_exynos_ipp_limit_val *lh = &l.h, *lv = &l.v;
 498
 499         if (!limits)
 500                 return 0;
 501
 502         __get_size_limit(limits, num_limits, IPP_LIMIT_BUFFER, &l);
 503         if (!__size_limit_check(buf->buf.width, &l.h) ||
 504             !__size_limit_check(buf->buf.height, &l.v))
 505                 return -EINVAL;
 506
 507         if (swap) {
 508                 lv = &l.h;
 509                 lh = &l.v;
 510         }
 511         __get_size_limit(limits, num_limits, id, &l);
 512         if (!__size_limit_check(buf->rect.w, lh) ||
 513             !__align_check(buf->rect.x, lh->align) ||
 514             !__size_limit_check(buf->rect.h, lv) ||
 515             !__align_check(buf->rect.y, lv->align))
 516                 return -EINVAL;
 517
 518         return 0;
 519 }
 520
 521 static inline bool __scale_limit_check(unsigned int src, unsigned int dst,
 522                                        unsigned int min, unsigned int max)
 523 {
 524         if ((max && (dst << 16) > src * max) ||
 525             (min && (dst << 16) < src * min)) {
 526                 DRM_DEBUG_DRIVER("Scale from %d to %d exceeds HW limits (ratio min %d.%05d, max %d.%05d)\n",
 527                          src, dst,
 528                          min >> 16, 100000 * (min & 0xffff) / (1 << 16),
 529                          max >> 16, 100000 * (max & 0xffff) / (1 << 16));
 530                 return false;
 531         }
 532         return true;
 533 }
 534
 535 static int exynos_drm_ipp_check_scale_limits(
 536                                 struct drm_exynos_ipp_task_rect *src,
 537                                 struct drm_exynos_ipp_task_rect *dst,
 538                                 const struct drm_exynos_ipp_limit *limits,
 539                                 unsigned int num_limits, bool swap)
 540 {
 541         const struct drm_exynos_ipp_limit_val *lh, *lv;
 542         int dw, dh;
 543
 544         for (; num_limits; limits++, num_limits--)
 545                 if ((limits->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) ==
 546                     DRM_EXYNOS_IPP_LIMIT_TYPE_SCALE)
 547                         break;
 548         if (!num_limits)
 549                 return 0;
 550
 551         lh = (!swap) ? &limits->h : &limits->v;
 552         lv = (!swap) ? &limits->v : &limits->h;
 553         dw = (!swap) ? dst->w : dst->h;
 554         dh = (!swap) ? dst->h : dst->w;
 555
 556         if (!__scale_limit_check(src->w, dw, lh->min, lh->max) ||
 557             !__scale_limit_check(src->h, dh, lv->min, lv->max))
 558                 return -EINVAL;
 559
 560         return 0;
 561 }
 562
 563 static int exynos_drm_ipp_task_check(struct exynos_drm_ipp_task *task)
 564 {
 565         struct exynos_drm_ipp *ipp = task->ipp;
 566         const struct exynos_drm_ipp_formats *src_fmt, *dst_fmt;
 567         struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
 568         unsigned int rotation = task->transform.rotation;
 569         int ret = 0;
 570         bool swap = drm_rotation_90_or_270(rotation);
 571         bool rotate = (rotation != DRM_MODE_ROTATE_0);
 572         bool scale = false;
 573
 574         DRM_DEBUG_DRIVER("Checking task %pK\n", task);
 575
 576         if (src->rect.w == UINT_MAX)
 577                 src->rect.w = src->buf.width;
 578         if (src->rect.h == UINT_MAX)
 579                 src->rect.h = src->buf.height;
 580         if (dst->rect.w == UINT_MAX)
 581                 dst->rect.w = dst->buf.width;
 582         if (dst->rect.h == UINT_MAX)
 583                 dst->rect.h = dst->buf.height;
 584
 585         if (src->rect.x + src->rect.w > (src->buf.width) ||
 586             src->rect.y + src->rect.h > (src->buf.height) ||
 587             dst->rect.x + dst->rect.w > (dst->buf.width) ||
 588             dst->rect.y + dst->rect.h > (dst->buf.height)) {
 589                 DRM_DEBUG_DRIVER("Task %pK: defined area is outside provided buffers\n",
 590                                  task);
 591                 return -EINVAL;
 592         }
 593
 594         if ((!swap && (src->rect.w != dst->rect.w ||
 595                        src->rect.h != dst->rect.h)) ||
 596             (swap && (src->rect.w != dst->rect.h ||
 597                       src->rect.h != dst->rect.w)))
 598                 scale = true;
 599
 600         if ((!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CROP) &&
 601              (src->rect.x || src->rect.y || dst->rect.x || dst->rect.y)) ||
 602             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_ROTATE) && rotate) ||
 603             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_SCALE) && scale) ||
 604             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CONVERT) &&
 605              src->buf.fourcc != dst->buf.fourcc)) {
 606                 DRM_DEBUG_DRIVER("Task %pK: hw capabilities exceeded\n", task);
 607                 return -EINVAL;
 608         }
 609
 610         src_fmt = __ipp_format_get(ipp, src->buf.fourcc, src->buf.modifier,
 611                                    DRM_EXYNOS_IPP_FORMAT_SOURCE);
 612         if (!src_fmt) {
 613                 DRM_DEBUG_DRIVER("Task %pK: src format not supported\n", task);
 614                 return -EINVAL;
 615         }
 616         ret = exynos_drm_ipp_check_size_limits(src, src_fmt->limits,
 617                                                src_fmt->num_limits,
 618                                                rotate, false);
 619         if (ret)
 620                 return ret;
 621         ret = exynos_drm_ipp_check_scale_limits(&src->rect, &dst->rect,
 622                                                 src_fmt->limits,
 623                                                 src_fmt->num_limits, swap);
 624         if (ret)
 625                 return ret;
 626
 627         dst_fmt = __ipp_format_get(ipp, dst->buf.fourcc, dst->buf.modifier,
 628                                    DRM_EXYNOS_IPP_FORMAT_DESTINATION);
 629         if (!dst_fmt) {
 630                 DRM_DEBUG_DRIVER("Task %pK: dst format not supported\n", task);
 631                 return -EINVAL;
 632         }
 633         ret = exynos_drm_ipp_check_size_limits(dst, dst_fmt->limits,
 634                                                dst_fmt->num_limits,
 635                                                false, swap);
 636         if (ret)
 637                 return ret;
 638         ret = exynos_drm_ipp_check_scale_limits(&src->rect, &dst->rect,
 639                                                 dst_fmt->limits,
 640                                                 dst_fmt->num_limits, swap);
 641         if (ret)
 642                 return ret;
 643
 644         DRM_DEBUG_DRIVER("Task %pK: all checks done.\n", task);
 645
 646         return ret;
 647 }
 648
 649 static int exynos_drm_ipp_task_setup_buffers(struct exynos_drm_ipp_task *task,
 650                                      struct drm_file *filp)
 651 {
 652         struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
 653         int ret = 0;
 654
 655         DRM_DEBUG_DRIVER("Setting buffer for task %pK\n", task);
 656
 657         ret = exynos_drm_ipp_task_setup_buffer(src, filp);
 658         if (ret) {
 659                 DRM_DEBUG_DRIVER("Task %pK: src buffer setup failed\n", task);
 660                 return ret;
 661         }
 662         ret = exynos_drm_ipp_task_setup_buffer(dst, filp);
 663         if (ret) {
 664                 DRM_DEBUG_DRIVER("Task %pK: dst buffer setup failed\n", task);
 665                 return ret;
 666         }
 667
 668         DRM_DEBUG_DRIVER("Task %pK: buffers prepared.\n", task);
 669
 670         return ret;
 671 }
 672
 673
 674 static int exynos_drm_ipp_event_create(struct exynos_drm_ipp_task *task,
 675                                  struct drm_file *file_priv, uint64_t user_data)
 676 {
 677         struct drm_pending_exynos_ipp_event *e = NULL;
 678         int ret;
 679
 680         e = kzalloc(sizeof(*e), GFP_KERNEL);
 681         if (!e)
 682                 return -ENOMEM;
 683
 684         e->event.base.type = DRM_EXYNOS_IPP_EVENT;
 685         e->event.base.length = sizeof(e->event);
 686         e->event.user_data = user_data;
 687
 688         ret = drm_event_reserve_init(task->dev, file_priv, &e->base,
 689                                      &e->event.base);
 690         if (ret)
 691                 goto free;
 692
 693         task->event = e;
 694         return 0;
 695 free:
 696         kfree(e);
 697         return ret;
 698 }
 699
 700 static void exynos_drm_ipp_event_send(struct exynos_drm_ipp_task *task)
 701 {
 702         struct timespec64 now;
 703
 704         ktime_get_ts64(&now);
 705         task->event->event.tv_sec = now.tv_sec;
 706         task->event->event.tv_usec = now.tv_nsec / NSEC_PER_USEC;
 707         task->event->event.sequence = atomic_inc_return(&task->ipp->sequence);
 708
 709         drm_send_event(task->dev, &task->event->base);
 710 }
 711
 712 static int exynos_drm_ipp_task_cleanup(struct exynos_drm_ipp_task *task)
 713 {
 714         int ret = task->ret;
 715
 716         if (ret == 0 && task->event) {
 717                 exynos_drm_ipp_event_send(task);
 718                 /* ensure event won't be canceled on task free */
 719                 task->event = NULL;
 720         }
 721
 722         exynos_drm_ipp_task_free(task->ipp, task);
 723         return ret;
 724 }
 725
 726 static void exynos_drm_ipp_cleanup_work(struct work_struct *work)
 727 {
 728         struct exynos_drm_ipp_task *task = container_of(work,
 729                                       struct exynos_drm_ipp_task, cleanup_work);
 730
 731         exynos_drm_ipp_task_cleanup(task);
 732 }
 733
 734 static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp);
 735
 736 /**
 737  * exynos_drm_ipp_task_done - finish given task and set return code
 738  * @task: ipp task to finish
 739  * @ret: error code or 0 if operation has been performed successfully
 740  */
 741 void exynos_drm_ipp_task_done(struct exynos_drm_ipp_task *task, int ret)
 742 {
 743         struct exynos_drm_ipp *ipp = task->ipp;
 744         unsigned long flags;
 745
 746         DRM_DEBUG_DRIVER("ipp: %d, task %pK done: %d\n", ipp->id, task, ret);
 747
 748         spin_lock_irqsave(&ipp->lock, flags);
 749         if (ipp->task == task)
 750                 ipp->task = NULL;
 751         task->flags |= DRM_EXYNOS_IPP_TASK_DONE;
 752         task->ret = ret;
 753         spin_unlock_irqrestore(&ipp->lock, flags);
 754
 755         exynos_drm_ipp_next_task(ipp);
 756         wake_up(&ipp->done_wq);
 757
 758         if (task->flags & DRM_EXYNOS_IPP_TASK_ASYNC) {
 759                 INIT_WORK(&task->cleanup_work, exynos_drm_ipp_cleanup_work);
 760                 schedule_work(&task->cleanup_work);
 761         }
 762 }
 763
 764 static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp)
 765 {
 766         struct exynos_drm_ipp_task *task;
 767         unsigned long flags;
 768         int ret;
 769
 770         DRM_DEBUG_DRIVER("ipp: %d, try to run new task\n", ipp->id);
 771
 772         spin_lock_irqsave(&ipp->lock, flags);
 773
 774         if (ipp->task || list_empty(&ipp->todo_list)) {
 775                 spin_unlock_irqrestore(&ipp->lock, flags);
 776                 return;
 777         }
 778
 779         task = list_first_entry(&ipp->todo_list, struct exynos_drm_ipp_task,
 780                                 head);
 781         list_del_init(&task->head);
 782         ipp->task = task;
 783
 784         spin_unlock_irqrestore(&ipp->lock, flags);
 785
 786         DRM_DEBUG_DRIVER("ipp: %d, selected task %pK to run\n", ipp->id, task);
 787
 788         ret = ipp->funcs->commit(ipp, task);
 789         if (ret)
 790                 exynos_drm_ipp_task_done(task, ret);
 791 }
 792
 793 static void exynos_drm_ipp_schedule_task(struct exynos_drm_ipp *ipp,
 794                                          struct exynos_drm_ipp_task *task)
 795 {
 796         unsigned long flags;
 797
 798         spin_lock_irqsave(&ipp->lock, flags);
 799         list_add(&task->head, &ipp->todo_list);
 800         spin_unlock_irqrestore(&ipp->lock, flags);
 801
 802         exynos_drm_ipp_next_task(ipp);
 803 }
 804
 805 static void exynos_drm_ipp_task_abort(struct exynos_drm_ipp *ipp,
 806                                       struct exynos_drm_ipp_task *task)
 807 {
 808         unsigned long flags;
 809
 810         spin_lock_irqsave(&ipp->lock, flags);
 811         if (task->flags & DRM_EXYNOS_IPP_TASK_DONE) {
 812                 /* already completed task */
 813                 exynos_drm_ipp_task_cleanup(task);
 814         } else if (ipp->task != task) {
 815                 /* task has not been scheduled for execution yet */
 816                 list_del_init(&task->head);
 817                 exynos_drm_ipp_task_cleanup(task);
 818         } else {
 819                 /*
 820                  * currently processed task, call abort() and perform
 821                  * cleanup with async worker
 822                  */
 823                 task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
 824                 spin_unlock_irqrestore(&ipp->lock, flags);
 825                 if (ipp->funcs->abort)
 826                         ipp->funcs->abort(ipp, task);
 827                 return;
 828         }
 829         spin_unlock_irqrestore(&ipp->lock, flags);
 830 }
 831
 832 /**
 833  * exynos_drm_ipp_commit_ioctl - perform image processing operation
 834  * @dev: DRM device
 835  * @data: ioctl data
 836  * @file_priv: DRM file info
 837  *
 838  * Construct a ipp task from the set of properties provided from the user
 839  * and try to schedule it to framebuffer processor hardware.
 840  *
 841  * Called by the user via ioctl.
 842  *
 843  * Returns:
 844  * Zero on success, negative errno on failure.
 845  */
 846 int exynos_drm_ipp_commit_ioctl(struct drm_device *dev, void *data,
 847                                 struct drm_file *file_priv)
 848 {
 849         struct drm_exynos_ioctl_ipp_commit *arg = data;
 850         struct exynos_drm_ipp *ipp;
 851         struct exynos_drm_ipp_task *task;
 852         int ret = 0;
 853
 854         if ((arg->flags & ~DRM_EXYNOS_IPP_FLAGS) || arg->reserved)
 855                 return -EINVAL;
 856
 857         /* can't test and expect an event at the same time */
 858         if ((arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY) &&
 859                         (arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT))
 860                 return -EINVAL;
 861
 862         ipp = __ipp_get(arg->ipp_id);
 863         if (!ipp)
 864                 return -ENOENT;
 865
 866         task = exynos_drm_ipp_task_alloc(ipp);
 867         if (!task)
 868                 return -ENOMEM;
 869
 870         ret = exynos_drm_ipp_task_set(task, arg);
 871         if (ret)
 872                 goto free;
 873
 874         ret = exynos_drm_ipp_task_check(task);
 875         if (ret)
 876                 goto free;
 877
 878         ret = exynos_drm_ipp_task_setup_buffers(task, file_priv);
 879         if (ret || arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY)
 880                 goto free;
 881
 882         if (arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT) {
 883                 ret = exynos_drm_ipp_event_create(task, file_priv,
 884                                                  arg->user_data);
 885                 if (ret)
 886                         goto free;
 887         }
 888
 889         /*
 890          * Queue task for processing on the hardware. task object will be
 891          * then freed after exynos_drm_ipp_task_done()
 892          */
 893         if (arg->flags & DRM_EXYNOS_IPP_FLAG_NONBLOCK) {
 894                 DRM_DEBUG_DRIVER("ipp: %d, nonblocking processing task %pK\n",
 895                                  ipp->id, task);
 896
 897                 task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
 898                 exynos_drm_ipp_schedule_task(task->ipp, task);
 899                 ret = 0;
 900         } else {
 901                 DRM_DEBUG_DRIVER("ipp: %d, processing task %pK\n", ipp->id,
 902                                  task);
 903                 exynos_drm_ipp_schedule_task(ipp, task);
 904                 ret = wait_event_interruptible(ipp->done_wq,
 905                                         task->flags & DRM_EXYNOS_IPP_TASK_DONE);
 906                 if (ret)
 907                         exynos_drm_ipp_task_abort(ipp, task);
 908                 else
 909                         ret = exynos_drm_ipp_task_cleanup(task);
 910         }
 911         return ret;
 912 free:
 913         exynos_drm_ipp_task_free(ipp, task);
 914
 915         return ret;
 916 }