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 /* 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 drm_gem_object *obj = drm_gem_object_lookup(filp, 354 buf->buf.gem_id[i]); 355 if (!obj) { 356 ret = -ENOENT; 357 goto gem_free; 358 } 359 buf->exynos_gem[i] = to_exynos_gem(obj); 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 drm_gem_object_put_unlocked(&buf->exynos_gem[i]->base); 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 drm_gem_object_put_unlocked(&buf->exynos_gem[i]->base); 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_ipp_size_id 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 } 923