drivers/gpu/drm/exynos/exynos_drm_ipp.c

   1 /*
   2  * Copyright (C) 2017 Samsung Electronics Co.Ltd
   3  * Authors:
   4  *      Marek Szyprowski <[email protected]>
   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         /* get GEM buffers and check their size */
 349         for (i = 0; i < buf->format->num_planes; i++) {
 350                 unsigned int height = (i == 0) ? buf->buf.height :
 351                              DIV_ROUND_UP(buf->buf.height, buf->format->vsub);
 352                 unsigned long size = height * buf->buf.pitch[i];
 353                 struct exynos_drm_gem *gem = exynos_drm_gem_get(filp,
 354                                                             buf->buf.gem_id[i]);
 355                 if (!gem) {
 356                         ret = -ENOENT;
 357                         goto gem_free;
 358                 }
 359                 buf->exynos_gem[i] = gem;
 360
 361                 if (size + buf->buf.offset[i] > buf->exynos_gem[i]->size) {
 362                         i++;
 363                         ret = -EINVAL;
 364                         goto gem_free;
 365                 }
 366                 buf->dma_addr[i] = buf->exynos_gem[i]->dma_addr +
 367                                    buf->buf.offset[i];
 368         }
 369
 370         return 0;
 371 gem_free:
 372         while (i--) {
 373                 exynos_drm_gem_put(buf->exynos_gem[i]);
 374                 buf->exynos_gem[i] = NULL;
 375         }
 376         return ret;
 377 }
 378
 379 static void exynos_drm_ipp_task_release_buf(struct exynos_drm_ipp_buffer *buf)
 380 {
 381         int i;
 382
 383         if (!buf->exynos_gem[0])
 384                 return;
 385         for (i = 0; i < buf->format->num_planes; i++)
 386                 exynos_drm_gem_put(buf->exynos_gem[i]);
 387 }
 388
 389 static void exynos_drm_ipp_task_free(struct exynos_drm_ipp *ipp,
 390                                  struct exynos_drm_ipp_task *task)
 391 {
 392         DRM_DEBUG_DRIVER("Freeing task %pK\n", task);
 393
 394         exynos_drm_ipp_task_release_buf(&task->src);
 395         exynos_drm_ipp_task_release_buf(&task->dst);
 396         if (task->event)
 397                 drm_event_cancel_free(ipp->dev, &task->event->base);
 398         kfree(task);
 399 }
 400
 401 struct drm_ipp_limit {
 402         struct drm_exynos_ipp_limit_val h;
 403         struct drm_exynos_ipp_limit_val v;
 404 };
 405
 406 enum drm_ipp_size_id {
 407         IPP_LIMIT_BUFFER, IPP_LIMIT_AREA, IPP_LIMIT_ROTATED, IPP_LIMIT_MAX
 408 };
 409
 410 static const enum drm_exynos_ipp_limit_type limit_id_fallback[IPP_LIMIT_MAX][4] = {
 411         [IPP_LIMIT_BUFFER]  = { DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 412         [IPP_LIMIT_AREA]    = { DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
 413                                 DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 414         [IPP_LIMIT_ROTATED] = { DRM_EXYNOS_IPP_LIMIT_SIZE_ROTATED,
 415                                 DRM_EXYNOS_IPP_LIMIT_SIZE_AREA,
 416                                 DRM_EXYNOS_IPP_LIMIT_SIZE_BUFFER },
 417 };
 418
 419 static inline void __limit_set_val(unsigned int *ptr, unsigned int val)
 420 {
 421         if (!*ptr)
 422                 *ptr = val;
 423 }
 424
 425 static void __get_size_limit(const struct drm_exynos_ipp_limit *limits,
 426                              unsigned int num_limits, enum drm_ipp_size_id id,
 427                              struct drm_ipp_limit *res)
 428 {
 429         const struct drm_exynos_ipp_limit *l = limits;
 430         int i = 0;
 431
 432         memset(res, 0, sizeof(*res));
 433         for (i = 0; limit_id_fallback[id][i]; i++)
 434                 for (l = limits; l - limits < num_limits; l++) {
 435                         if (((l->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) !=
 436                               DRM_EXYNOS_IPP_LIMIT_TYPE_SIZE) ||
 437                             ((l->type & DRM_EXYNOS_IPP_LIMIT_SIZE_MASK) !=
 438                                                      limit_id_fallback[id][i]))
 439                                 continue;
 440                         __limit_set_val(&res->h.min, l->h.min);
 441                         __limit_set_val(&res->h.max, l->h.max);
 442                         __limit_set_val(&res->h.align, l->h.align);
 443                         __limit_set_val(&res->v.min, l->v.min);
 444                         __limit_set_val(&res->v.max, l->v.max);
 445                         __limit_set_val(&res->v.align, l->v.align);
 446                 }
 447 }
 448
 449 static inline bool __align_check(unsigned int val, unsigned int align)
 450 {
 451         if (align && (val & (align - 1))) {
 452                 DRM_DEBUG_DRIVER("Value %d exceeds HW limits (align %d)\n",
 453                                  val, align);
 454                 return false;
 455         }
 456         return true;
 457 }
 458
 459 static inline bool __size_limit_check(unsigned int val,
 460                                  struct drm_exynos_ipp_limit_val *l)
 461 {
 462         if ((l->min && val < l->min) || (l->max && val > l->max)) {
 463                 DRM_DEBUG_DRIVER("Value %d exceeds HW limits (min %d, max %d)\n",
 464                                  val, l->min, l->max);
 465                 return false;
 466         }
 467         return __align_check(val, l->align);
 468 }
 469
 470 static int exynos_drm_ipp_check_size_limits(struct exynos_drm_ipp_buffer *buf,
 471         const struct drm_exynos_ipp_limit *limits, unsigned int num_limits,
 472         bool rotate, bool swap)
 473 {
 474         enum drm_ipp_size_id id = rotate ? IPP_LIMIT_ROTATED : IPP_LIMIT_AREA;
 475         struct drm_ipp_limit l;
 476         struct drm_exynos_ipp_limit_val *lh = &l.h, *lv = &l.v;
 477         int real_width = buf->buf.pitch[0] / buf->format->cpp[0];
 478
 479         if (!limits)
 480                 return 0;
 481
 482         __get_size_limit(limits, num_limits, IPP_LIMIT_BUFFER, &l);
 483         if (!__size_limit_check(real_width, &l.h) ||
 484             !__size_limit_check(buf->buf.height, &l.v))
 485                 return -EINVAL;
 486
 487         if (swap) {
 488                 lv = &l.h;
 489                 lh = &l.v;
 490         }
 491         __get_size_limit(limits, num_limits, id, &l);
 492         if (!__size_limit_check(buf->rect.w, lh) ||
 493             !__align_check(buf->rect.x, lh->align) ||
 494             !__size_limit_check(buf->rect.h, lv) ||
 495             !__align_check(buf->rect.y, lv->align))
 496                 return -EINVAL;
 497
 498         return 0;
 499 }
 500
 501 static inline bool __scale_limit_check(unsigned int src, unsigned int dst,
 502                                        unsigned int min, unsigned int max)
 503 {
 504         if ((max && (dst << 16) > src * max) ||
 505             (min && (dst << 16) < src * min)) {
 506                 DRM_DEBUG_DRIVER("Scale from %d to %d exceeds HW limits (ratio min %d.%05d, max %d.%05d)\n",
 507                          src, dst,
 508                          min >> 16, 100000 * (min & 0xffff) / (1 << 16),
 509                          max >> 16, 100000 * (max & 0xffff) / (1 << 16));
 510                 return false;
 511         }
 512         return true;
 513 }
 514
 515 static int exynos_drm_ipp_check_scale_limits(
 516                                 struct drm_exynos_ipp_task_rect *src,
 517                                 struct drm_exynos_ipp_task_rect *dst,
 518                                 const struct drm_exynos_ipp_limit *limits,
 519                                 unsigned int num_limits, bool swap)
 520 {
 521         const struct drm_exynos_ipp_limit_val *lh, *lv;
 522         int dw, dh;
 523
 524         for (; num_limits; limits++, num_limits--)
 525                 if ((limits->type & DRM_EXYNOS_IPP_LIMIT_TYPE_MASK) ==
 526                     DRM_EXYNOS_IPP_LIMIT_TYPE_SCALE)
 527                         break;
 528         if (!num_limits)
 529                 return 0;
 530
 531         lh = (!swap) ? &limits->h : &limits->v;
 532         lv = (!swap) ? &limits->v : &limits->h;
 533         dw = (!swap) ? dst->w : dst->h;
 534         dh = (!swap) ? dst->h : dst->w;
 535
 536         if (!__scale_limit_check(src->w, dw, lh->min, lh->max) ||
 537             !__scale_limit_check(src->h, dh, lv->min, lv->max))
 538                 return -EINVAL;
 539
 540         return 0;
 541 }
 542
 543 static int exynos_drm_ipp_check_format(struct exynos_drm_ipp_task *task,
 544                                        struct exynos_drm_ipp_buffer *buf,
 545                                        struct exynos_drm_ipp_buffer *src,
 546                                        struct exynos_drm_ipp_buffer *dst,
 547                                        bool rotate, bool swap)
 548 {
 549         const struct exynos_drm_ipp_formats *fmt;
 550         int ret, i;
 551
 552         fmt = __ipp_format_get(task->ipp, buf->buf.fourcc, buf->buf.modifier,
 553                                buf == src ? DRM_EXYNOS_IPP_FORMAT_SOURCE :
 554                                             DRM_EXYNOS_IPP_FORMAT_DESTINATION);
 555         if (!fmt) {
 556                 DRM_DEBUG_DRIVER("Task %pK: %s format not supported\n", task,
 557                                  buf == src ? "src" : "dst");
 558                 return -EINVAL;
 559         }
 560
 561         /* basic checks */
 562         if (buf->buf.width == 0 || buf->buf.height == 0)
 563                 return -EINVAL;
 564
 565         buf->format = drm_format_info(buf->buf.fourcc);
 566         for (i = 0; i < buf->format->num_planes; i++) {
 567                 unsigned int width = (i == 0) ? buf->buf.width :
 568                              DIV_ROUND_UP(buf->buf.width, buf->format->hsub);
 569
 570                 if (buf->buf.pitch[i] == 0)
 571                         buf->buf.pitch[i] = width * buf->format->cpp[i];
 572                 if (buf->buf.pitch[i] < width * buf->format->cpp[i])
 573                         return -EINVAL;
 574                 if (!buf->buf.gem_id[i])
 575                         return -ENOENT;
 576         }
 577
 578         /* pitch for additional planes must match */
 579         if (buf->format->num_planes > 2 &&
 580             buf->buf.pitch[1] != buf->buf.pitch[2])
 581                 return -EINVAL;
 582
 583         /* check driver limits */
 584         ret = exynos_drm_ipp_check_size_limits(buf, fmt->limits,
 585                                                fmt->num_limits,
 586                                                rotate,
 587                                                buf == dst ? swap : false);
 588         if (ret)
 589                 return ret;
 590         ret = exynos_drm_ipp_check_scale_limits(&src->rect, &dst->rect,
 591                                                 fmt->limits,
 592                                                 fmt->num_limits, swap);
 593         return ret;
 594 }
 595
 596 static int exynos_drm_ipp_task_check(struct exynos_drm_ipp_task *task)
 597 {
 598         struct exynos_drm_ipp *ipp = task->ipp;
 599         struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
 600         unsigned int rotation = task->transform.rotation;
 601         int ret = 0;
 602         bool swap = drm_rotation_90_or_270(rotation);
 603         bool rotate = (rotation != DRM_MODE_ROTATE_0);
 604         bool scale = false;
 605
 606         DRM_DEBUG_DRIVER("Checking task %pK\n", task);
 607
 608         if (src->rect.w == UINT_MAX)
 609                 src->rect.w = src->buf.width;
 610         if (src->rect.h == UINT_MAX)
 611                 src->rect.h = src->buf.height;
 612         if (dst->rect.w == UINT_MAX)
 613                 dst->rect.w = dst->buf.width;
 614         if (dst->rect.h == UINT_MAX)
 615                 dst->rect.h = dst->buf.height;
 616
 617         if (src->rect.x + src->rect.w > (src->buf.width) ||
 618             src->rect.y + src->rect.h > (src->buf.height) ||
 619             dst->rect.x + dst->rect.w > (dst->buf.width) ||
 620             dst->rect.y + dst->rect.h > (dst->buf.height)) {
 621                 DRM_DEBUG_DRIVER("Task %pK: defined area is outside provided buffers\n",
 622                                  task);
 623                 return -EINVAL;
 624         }
 625
 626         if ((!swap && (src->rect.w != dst->rect.w ||
 627                        src->rect.h != dst->rect.h)) ||
 628             (swap && (src->rect.w != dst->rect.h ||
 629                       src->rect.h != dst->rect.w)))
 630                 scale = true;
 631
 632         if ((!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CROP) &&
 633              (src->rect.x || src->rect.y || dst->rect.x || dst->rect.y)) ||
 634             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_ROTATE) && rotate) ||
 635             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_SCALE) && scale) ||
 636             (!(ipp->capabilities & DRM_EXYNOS_IPP_CAP_CONVERT) &&
 637              src->buf.fourcc != dst->buf.fourcc)) {
 638                 DRM_DEBUG_DRIVER("Task %pK: hw capabilities exceeded\n", task);
 639                 return -EINVAL;
 640         }
 641
 642         ret = exynos_drm_ipp_check_format(task, src, src, dst, rotate, swap);
 643         if (ret)
 644                 return ret;
 645
 646         ret = exynos_drm_ipp_check_format(task, dst, src, dst, false, swap);
 647         if (ret)
 648                 return ret;
 649
 650         DRM_DEBUG_DRIVER("Task %pK: all checks done.\n", task);
 651
 652         return ret;
 653 }
 654
 655 static int exynos_drm_ipp_task_setup_buffers(struct exynos_drm_ipp_task *task,
 656                                      struct drm_file *filp)
 657 {
 658         struct exynos_drm_ipp_buffer *src = &task->src, *dst = &task->dst;
 659         int ret = 0;
 660
 661         DRM_DEBUG_DRIVER("Setting buffer for task %pK\n", task);
 662
 663         ret = exynos_drm_ipp_task_setup_buffer(src, filp);
 664         if (ret) {
 665                 DRM_DEBUG_DRIVER("Task %pK: src buffer setup failed\n", task);
 666                 return ret;
 667         }
 668         ret = exynos_drm_ipp_task_setup_buffer(dst, filp);
 669         if (ret) {
 670                 DRM_DEBUG_DRIVER("Task %pK: dst buffer setup failed\n", task);
 671                 return ret;
 672         }
 673
 674         DRM_DEBUG_DRIVER("Task %pK: buffers prepared.\n", task);
 675
 676         return ret;
 677 }
 678
 679
 680 static int exynos_drm_ipp_event_create(struct exynos_drm_ipp_task *task,
 681                                  struct drm_file *file_priv, uint64_t user_data)
 682 {
 683         struct drm_pending_exynos_ipp_event *e = NULL;
 684         int ret;
 685
 686         e = kzalloc(sizeof(*e), GFP_KERNEL);
 687         if (!e)
 688                 return -ENOMEM;
 689
 690         e->event.base.type = DRM_EXYNOS_IPP_EVENT;
 691         e->event.base.length = sizeof(e->event);
 692         e->event.user_data = user_data;
 693
 694         ret = drm_event_reserve_init(task->dev, file_priv, &e->base,
 695                                      &e->event.base);
 696         if (ret)
 697                 goto free;
 698
 699         task->event = e;
 700         return 0;
 701 free:
 702         kfree(e);
 703         return ret;
 704 }
 705
 706 static void exynos_drm_ipp_event_send(struct exynos_drm_ipp_task *task)
 707 {
 708         struct timespec64 now;
 709
 710         ktime_get_ts64(&now);
 711         task->event->event.tv_sec = now.tv_sec;
 712         task->event->event.tv_usec = now.tv_nsec / NSEC_PER_USEC;
 713         task->event->event.sequence = atomic_inc_return(&task->ipp->sequence);
 714
 715         drm_send_event(task->dev, &task->event->base);
 716 }
 717
 718 static int exynos_drm_ipp_task_cleanup(struct exynos_drm_ipp_task *task)
 719 {
 720         int ret = task->ret;
 721
 722         if (ret == 0 && task->event) {
 723                 exynos_drm_ipp_event_send(task);
 724                 /* ensure event won't be canceled on task free */
 725                 task->event = NULL;
 726         }
 727
 728         exynos_drm_ipp_task_free(task->ipp, task);
 729         return ret;
 730 }
 731
 732 static void exynos_drm_ipp_cleanup_work(struct work_struct *work)
 733 {
 734         struct exynos_drm_ipp_task *task = container_of(work,
 735                                       struct exynos_drm_ipp_task, cleanup_work);
 736
 737         exynos_drm_ipp_task_cleanup(task);
 738 }
 739
 740 static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp);
 741
 742 /**
 743  * exynos_drm_ipp_task_done - finish given task and set return code
 744  * @task: ipp task to finish
 745  * @ret: error code or 0 if operation has been performed successfully
 746  */
 747 void exynos_drm_ipp_task_done(struct exynos_drm_ipp_task *task, int ret)
 748 {
 749         struct exynos_drm_ipp *ipp = task->ipp;
 750         unsigned long flags;
 751
 752         DRM_DEBUG_DRIVER("ipp: %d, task %pK done: %d\n", ipp->id, task, ret);
 753
 754         spin_lock_irqsave(&ipp->lock, flags);
 755         if (ipp->task == task)
 756                 ipp->task = NULL;
 757         task->flags |= DRM_EXYNOS_IPP_TASK_DONE;
 758         task->ret = ret;
 759         spin_unlock_irqrestore(&ipp->lock, flags);
 760
 761         exynos_drm_ipp_next_task(ipp);
 762         wake_up(&ipp->done_wq);
 763
 764         if (task->flags & DRM_EXYNOS_IPP_TASK_ASYNC) {
 765                 INIT_WORK(&task->cleanup_work, exynos_drm_ipp_cleanup_work);
 766                 schedule_work(&task->cleanup_work);
 767         }
 768 }
 769
 770 static void exynos_drm_ipp_next_task(struct exynos_drm_ipp *ipp)
 771 {
 772         struct exynos_drm_ipp_task *task;
 773         unsigned long flags;
 774         int ret;
 775
 776         DRM_DEBUG_DRIVER("ipp: %d, try to run new task\n", ipp->id);
 777
 778         spin_lock_irqsave(&ipp->lock, flags);
 779
 780         if (ipp->task || list_empty(&ipp->todo_list)) {
 781                 spin_unlock_irqrestore(&ipp->lock, flags);
 782                 return;
 783         }
 784
 785         task = list_first_entry(&ipp->todo_list, struct exynos_drm_ipp_task,
 786                                 head);
 787         list_del_init(&task->head);
 788         ipp->task = task;
 789
 790         spin_unlock_irqrestore(&ipp->lock, flags);
 791
 792         DRM_DEBUG_DRIVER("ipp: %d, selected task %pK to run\n", ipp->id, task);
 793
 794         ret = ipp->funcs->commit(ipp, task);
 795         if (ret)
 796                 exynos_drm_ipp_task_done(task, ret);
 797 }
 798
 799 static void exynos_drm_ipp_schedule_task(struct exynos_drm_ipp *ipp,
 800                                          struct exynos_drm_ipp_task *task)
 801 {
 802         unsigned long flags;
 803
 804         spin_lock_irqsave(&ipp->lock, flags);
 805         list_add(&task->head, &ipp->todo_list);
 806         spin_unlock_irqrestore(&ipp->lock, flags);
 807
 808         exynos_drm_ipp_next_task(ipp);
 809 }
 810
 811 static void exynos_drm_ipp_task_abort(struct exynos_drm_ipp *ipp,
 812                                       struct exynos_drm_ipp_task *task)
 813 {
 814         unsigned long flags;
 815
 816         spin_lock_irqsave(&ipp->lock, flags);
 817         if (task->flags & DRM_EXYNOS_IPP_TASK_DONE) {
 818                 /* already completed task */
 819                 exynos_drm_ipp_task_cleanup(task);
 820         } else if (ipp->task != task) {
 821                 /* task has not been scheduled for execution yet */
 822                 list_del_init(&task->head);
 823                 exynos_drm_ipp_task_cleanup(task);
 824         } else {
 825                 /*
 826                  * currently processed task, call abort() and perform
 827                  * cleanup with async worker
 828                  */
 829                 task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
 830                 spin_unlock_irqrestore(&ipp->lock, flags);
 831                 if (ipp->funcs->abort)
 832                         ipp->funcs->abort(ipp, task);
 833                 return;
 834         }
 835         spin_unlock_irqrestore(&ipp->lock, flags);
 836 }
 837
 838 /**
 839  * exynos_drm_ipp_commit_ioctl - perform image processing operation
 840  * @dev: DRM device
 841  * @data: ioctl data
 842  * @file_priv: DRM file info
 843  *
 844  * Construct a ipp task from the set of properties provided from the user
 845  * and try to schedule it to framebuffer processor hardware.
 846  *
 847  * Called by the user via ioctl.
 848  *
 849  * Returns:
 850  * Zero on success, negative errno on failure.
 851  */
 852 int exynos_drm_ipp_commit_ioctl(struct drm_device *dev, void *data,
 853                                 struct drm_file *file_priv)
 854 {
 855         struct drm_exynos_ioctl_ipp_commit *arg = data;
 856         struct exynos_drm_ipp *ipp;
 857         struct exynos_drm_ipp_task *task;
 858         int ret = 0;
 859
 860         if ((arg->flags & ~DRM_EXYNOS_IPP_FLAGS) || arg->reserved)
 861                 return -EINVAL;
 862
 863         /* can't test and expect an event at the same time */
 864         if ((arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY) &&
 865                         (arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT))
 866                 return -EINVAL;
 867
 868         ipp = __ipp_get(arg->ipp_id);
 869         if (!ipp)
 870                 return -ENOENT;
 871
 872         task = exynos_drm_ipp_task_alloc(ipp);
 873         if (!task)
 874                 return -ENOMEM;
 875
 876         ret = exynos_drm_ipp_task_set(task, arg);
 877         if (ret)
 878                 goto free;
 879
 880         ret = exynos_drm_ipp_task_check(task);
 881         if (ret)
 882                 goto free;
 883
 884         ret = exynos_drm_ipp_task_setup_buffers(task, file_priv);
 885         if (ret || arg->flags & DRM_EXYNOS_IPP_FLAG_TEST_ONLY)
 886                 goto free;
 887
 888         if (arg->flags & DRM_EXYNOS_IPP_FLAG_EVENT) {
 889                 ret = exynos_drm_ipp_event_create(task, file_priv,
 890                                                  arg->user_data);
 891                 if (ret)
 892                         goto free;
 893         }
 894
 895         /*
 896          * Queue task for processing on the hardware. task object will be
 897          * then freed after exynos_drm_ipp_task_done()
 898          */
 899         if (arg->flags & DRM_EXYNOS_IPP_FLAG_NONBLOCK) {
 900                 DRM_DEBUG_DRIVER("ipp: %d, nonblocking processing task %pK\n",
 901                                  ipp->id, task);
 902
 903                 task->flags |= DRM_EXYNOS_IPP_TASK_ASYNC;
 904                 exynos_drm_ipp_schedule_task(task->ipp, task);
 905                 ret = 0;
 906         } else {
 907                 DRM_DEBUG_DRIVER("ipp: %d, processing task %pK\n", ipp->id,
 908                                  task);
 909                 exynos_drm_ipp_schedule_task(ipp, task);
 910                 ret = wait_event_interruptible(ipp->done_wq,
 911                                         task->flags & DRM_EXYNOS_IPP_TASK_DONE);
 912                 if (ret)
 913                         exynos_drm_ipp_task_abort(ipp, task);
 914                 else
 915                         ret = exynos_drm_ipp_task_cleanup(task);
 916         }
 917         return ret;
 918 free:
 919         exynos_drm_ipp_task_free(ipp, task);
 920
 921         return ret;
 922 }