Shrenuj Bansal | a419c79 | 2016-10-20 14:05:11 -0700 | [diff] [blame^] | 1 | /* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/file.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/uaccess.h> |
| 19 | |
| 20 | #include <asm/current.h> |
| 21 | |
| 22 | #include "kgsl_sync.h" |
| 23 | |
| 24 | static void kgsl_sync_timeline_signal(struct sync_timeline *timeline, |
| 25 | unsigned int timestamp); |
| 26 | |
| 27 | static struct sync_pt *kgsl_sync_pt_create(struct sync_timeline *timeline, |
| 28 | struct kgsl_context *context, unsigned int timestamp) |
| 29 | { |
| 30 | struct sync_pt *pt; |
| 31 | |
| 32 | pt = sync_pt_create(timeline, (int) sizeof(struct kgsl_sync_pt)); |
| 33 | if (pt) { |
| 34 | struct kgsl_sync_pt *kpt = (struct kgsl_sync_pt *) pt; |
| 35 | |
| 36 | kpt->context = context; |
| 37 | kpt->timestamp = timestamp; |
| 38 | } |
| 39 | return pt; |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | * This should only be called on sync_pts which have been created but |
| 44 | * not added to a fence. |
| 45 | */ |
| 46 | static void kgsl_sync_pt_destroy(struct sync_pt *pt) |
| 47 | { |
| 48 | sync_pt_free(pt); |
| 49 | } |
| 50 | |
| 51 | static struct sync_pt *kgsl_sync_pt_dup(struct sync_pt *pt) |
| 52 | { |
| 53 | struct kgsl_sync_pt *kpt = (struct kgsl_sync_pt *) pt; |
| 54 | |
| 55 | return kgsl_sync_pt_create(sync_pt_parent(pt), |
| 56 | kpt->context, kpt->timestamp); |
| 57 | } |
| 58 | |
| 59 | static int kgsl_sync_pt_has_signaled(struct sync_pt *pt) |
| 60 | { |
| 61 | struct kgsl_sync_pt *kpt = (struct kgsl_sync_pt *) pt; |
| 62 | struct kgsl_sync_timeline *ktimeline = |
| 63 | (struct kgsl_sync_timeline *) sync_pt_parent(pt); |
| 64 | unsigned int ts = kpt->timestamp; |
| 65 | int ret = 0; |
| 66 | |
| 67 | spin_lock(&ktimeline->lock); |
| 68 | ret = (timestamp_cmp(ktimeline->last_timestamp, ts) >= 0); |
| 69 | spin_unlock(&ktimeline->lock); |
| 70 | |
| 71 | return ret; |
| 72 | } |
| 73 | |
| 74 | static int kgsl_sync_pt_compare(struct sync_pt *a, struct sync_pt *b) |
| 75 | { |
| 76 | struct kgsl_sync_pt *kpt_a = (struct kgsl_sync_pt *) a; |
| 77 | struct kgsl_sync_pt *kpt_b = (struct kgsl_sync_pt *) b; |
| 78 | unsigned int ts_a = kpt_a->timestamp; |
| 79 | unsigned int ts_b = kpt_b->timestamp; |
| 80 | |
| 81 | return timestamp_cmp(ts_a, ts_b); |
| 82 | } |
| 83 | |
| 84 | struct kgsl_fence_event_priv { |
| 85 | struct kgsl_context *context; |
| 86 | unsigned int timestamp; |
| 87 | }; |
| 88 | |
| 89 | /** |
| 90 | * kgsl_fence_event_cb - Event callback for a fence timestamp event |
| 91 | * @device - The KGSL device that expired the timestamp |
| 92 | * @context- Pointer to the context that owns the event |
| 93 | * @priv: Private data for the callback |
| 94 | * @result - Result of the event (retired or canceled) |
| 95 | * |
| 96 | * Signal a fence following the expiration of a timestamp |
| 97 | */ |
| 98 | |
| 99 | static void kgsl_fence_event_cb(struct kgsl_device *device, |
| 100 | struct kgsl_event_group *group, void *priv, int result) |
| 101 | { |
| 102 | struct kgsl_fence_event_priv *ev = priv; |
| 103 | |
| 104 | kgsl_sync_timeline_signal(ev->context->timeline, ev->timestamp); |
| 105 | kgsl_context_put(ev->context); |
| 106 | kfree(ev); |
| 107 | } |
| 108 | |
| 109 | static int _add_fence_event(struct kgsl_device *device, |
| 110 | struct kgsl_context *context, unsigned int timestamp) |
| 111 | { |
| 112 | struct kgsl_fence_event_priv *event; |
| 113 | int ret; |
| 114 | |
| 115 | event = kmalloc(sizeof(*event), GFP_KERNEL); |
| 116 | if (event == NULL) |
| 117 | return -ENOMEM; |
| 118 | |
| 119 | /* |
| 120 | * Increase the refcount for the context to keep it through the |
| 121 | * callback |
| 122 | */ |
| 123 | if (!_kgsl_context_get(context)) { |
| 124 | kfree(event); |
| 125 | return -ENOENT; |
| 126 | } |
| 127 | |
| 128 | event->context = context; |
| 129 | event->timestamp = timestamp; |
| 130 | event->context = context; |
| 131 | |
| 132 | ret = kgsl_add_event(device, &context->events, timestamp, |
| 133 | kgsl_fence_event_cb, event); |
| 134 | |
| 135 | if (ret) { |
| 136 | kgsl_context_put(context); |
| 137 | kfree(event); |
| 138 | } |
| 139 | |
| 140 | return ret; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * kgsl_add_fence_event - Create a new fence event |
| 145 | * @device - KGSL device to create the event on |
| 146 | * @timestamp - Timestamp to trigger the event |
| 147 | * @data - Return fence fd stored in struct kgsl_timestamp_event_fence |
| 148 | * @len - length of the fence event |
| 149 | * @owner - driver instance that owns this event |
| 150 | * @returns 0 on success or error code on error |
| 151 | * |
| 152 | * Create a fence and register an event to signal the fence when |
| 153 | * the timestamp expires |
| 154 | */ |
| 155 | |
| 156 | int kgsl_add_fence_event(struct kgsl_device *device, |
| 157 | u32 context_id, u32 timestamp, void __user *data, int len, |
| 158 | struct kgsl_device_private *owner) |
| 159 | { |
| 160 | struct kgsl_timestamp_event_fence priv; |
| 161 | struct kgsl_context *context; |
| 162 | struct sync_pt *pt; |
| 163 | struct sync_fence *fence = NULL; |
| 164 | int ret = -EINVAL; |
| 165 | char fence_name[sizeof(fence->name)] = {}; |
| 166 | unsigned int cur; |
| 167 | |
| 168 | priv.fence_fd = -1; |
| 169 | |
| 170 | if (len != sizeof(priv)) |
| 171 | return -EINVAL; |
| 172 | |
| 173 | context = kgsl_context_get_owner(owner, context_id); |
| 174 | |
| 175 | if (context == NULL) |
| 176 | return -EINVAL; |
| 177 | |
| 178 | if (test_bit(KGSL_CONTEXT_PRIV_INVALID, &context->priv)) |
| 179 | goto out; |
| 180 | |
| 181 | pt = kgsl_sync_pt_create(context->timeline, context, timestamp); |
| 182 | if (pt == NULL) { |
| 183 | KGSL_DRV_CRIT_RATELIMIT(device, "kgsl_sync_pt_create failed\n"); |
| 184 | ret = -ENOMEM; |
| 185 | goto out; |
| 186 | } |
| 187 | snprintf(fence_name, sizeof(fence_name), |
| 188 | "%s-pid-%d-ctx-%d-ts-%d", |
| 189 | device->name, current->group_leader->pid, |
| 190 | context_id, timestamp); |
| 191 | |
| 192 | |
| 193 | fence = sync_fence_create(fence_name, pt); |
| 194 | if (fence == NULL) { |
| 195 | /* only destroy pt when not added to fence */ |
| 196 | kgsl_sync_pt_destroy(pt); |
| 197 | KGSL_DRV_CRIT_RATELIMIT(device, "sync_fence_create failed\n"); |
| 198 | ret = -ENOMEM; |
| 199 | goto out; |
| 200 | } |
| 201 | |
| 202 | priv.fence_fd = get_unused_fd_flags(0); |
| 203 | if (priv.fence_fd < 0) { |
| 204 | KGSL_DRV_CRIT_RATELIMIT(device, |
| 205 | "Unable to get a file descriptor: %d\n", |
| 206 | priv.fence_fd); |
| 207 | ret = priv.fence_fd; |
| 208 | goto out; |
| 209 | } |
| 210 | |
| 211 | /* |
| 212 | * If the timestamp hasn't expired yet create an event to trigger it. |
| 213 | * Otherwise, just signal the fence - there is no reason to go through |
| 214 | * the effort of creating a fence we don't need. |
| 215 | */ |
| 216 | |
| 217 | kgsl_readtimestamp(device, context, KGSL_TIMESTAMP_RETIRED, &cur); |
| 218 | |
| 219 | if (timestamp_cmp(cur, timestamp) >= 0) { |
| 220 | ret = 0; |
| 221 | kgsl_sync_timeline_signal(context->timeline, cur); |
| 222 | } else { |
| 223 | ret = _add_fence_event(device, context, timestamp); |
| 224 | if (ret) |
| 225 | goto out; |
| 226 | } |
| 227 | |
| 228 | if (copy_to_user(data, &priv, sizeof(priv))) { |
| 229 | ret = -EFAULT; |
| 230 | goto out; |
| 231 | } |
| 232 | sync_fence_install(fence, priv.fence_fd); |
| 233 | out: |
| 234 | kgsl_context_put(context); |
| 235 | if (ret) { |
| 236 | if (priv.fence_fd >= 0) |
| 237 | put_unused_fd(priv.fence_fd); |
| 238 | |
| 239 | if (fence) |
| 240 | sync_fence_put(fence); |
| 241 | } |
| 242 | return ret; |
| 243 | } |
| 244 | |
| 245 | static unsigned int kgsl_sync_get_timestamp( |
| 246 | struct kgsl_sync_timeline *ktimeline, enum kgsl_timestamp_type type) |
| 247 | { |
| 248 | unsigned int ret = 0; |
| 249 | struct kgsl_context *context; |
| 250 | |
| 251 | if (ktimeline->device == NULL) |
| 252 | return 0; |
| 253 | |
| 254 | context = kgsl_context_get(ktimeline->device, |
| 255 | ktimeline->context_id); |
| 256 | |
| 257 | if (context) |
| 258 | kgsl_readtimestamp(ktimeline->device, context, type, &ret); |
| 259 | |
| 260 | kgsl_context_put(context); |
| 261 | return ret; |
| 262 | } |
| 263 | |
| 264 | static void kgsl_sync_timeline_value_str(struct sync_timeline *sync_timeline, |
| 265 | char *str, int size) |
| 266 | { |
| 267 | struct kgsl_sync_timeline *ktimeline = |
| 268 | (struct kgsl_sync_timeline *) sync_timeline; |
| 269 | |
| 270 | /* |
| 271 | * This callback can be called before the device and spinlock are |
| 272 | * initialized in struct kgsl_sync_timeline. kgsl_sync_get_timestamp() |
| 273 | * will check if device is NULL and return 0. Queued and retired |
| 274 | * timestamp of the context will be reported as 0, which is correct |
| 275 | * because the context and timeline are just getting initialized. |
| 276 | */ |
| 277 | unsigned int timestamp_retired = kgsl_sync_get_timestamp(ktimeline, |
| 278 | KGSL_TIMESTAMP_RETIRED); |
| 279 | unsigned int timestamp_queued = kgsl_sync_get_timestamp(ktimeline, |
| 280 | KGSL_TIMESTAMP_QUEUED); |
| 281 | |
| 282 | snprintf(str, size, "%u queued:%u retired:%u", |
| 283 | ktimeline->last_timestamp, |
| 284 | timestamp_queued, timestamp_retired); |
| 285 | } |
| 286 | |
| 287 | static void kgsl_sync_pt_value_str(struct sync_pt *sync_pt, |
| 288 | char *str, int size) |
| 289 | { |
| 290 | struct kgsl_sync_pt *kpt = (struct kgsl_sync_pt *) sync_pt; |
| 291 | |
| 292 | snprintf(str, size, "%u", kpt->timestamp); |
| 293 | } |
| 294 | |
| 295 | static int kgsl_sync_fill_driver_data(struct sync_pt *sync_pt, void *data, |
| 296 | int size) |
| 297 | { |
| 298 | struct kgsl_sync_pt *kpt = (struct kgsl_sync_pt *) sync_pt; |
| 299 | |
| 300 | if (size < sizeof(kpt->timestamp)) |
| 301 | return -ENOMEM; |
| 302 | |
| 303 | memcpy(data, &kpt->timestamp, sizeof(kpt->timestamp)); |
| 304 | return sizeof(kpt->timestamp); |
| 305 | } |
| 306 | |
| 307 | static void kgsl_sync_timeline_release_obj(struct sync_timeline *sync_timeline) |
| 308 | { |
| 309 | /* |
| 310 | * Make sure to free the timeline only after destroy flag is set. |
| 311 | * This is to avoid further accessing to the timeline from KGSL and |
| 312 | * also to catch any unbalanced kref of timeline. |
| 313 | */ |
| 314 | BUG_ON(sync_timeline && (sync_timeline->destroyed != true)); |
| 315 | } |
| 316 | static const struct sync_timeline_ops kgsl_sync_timeline_ops = { |
| 317 | .driver_name = "kgsl-timeline", |
| 318 | .dup = kgsl_sync_pt_dup, |
| 319 | .has_signaled = kgsl_sync_pt_has_signaled, |
| 320 | .compare = kgsl_sync_pt_compare, |
| 321 | .timeline_value_str = kgsl_sync_timeline_value_str, |
| 322 | .pt_value_str = kgsl_sync_pt_value_str, |
| 323 | .fill_driver_data = kgsl_sync_fill_driver_data, |
| 324 | .release_obj = kgsl_sync_timeline_release_obj, |
| 325 | }; |
| 326 | |
| 327 | int kgsl_sync_timeline_create(struct kgsl_context *context) |
| 328 | { |
| 329 | struct kgsl_sync_timeline *ktimeline; |
| 330 | |
| 331 | /* |
| 332 | * Generate a name which includes the thread name, thread id, process |
| 333 | * name, process id, and context id. This makes it possible to |
| 334 | * identify the context of a timeline in the sync dump. |
| 335 | */ |
| 336 | char ktimeline_name[sizeof(context->timeline->name)] = {}; |
| 337 | |
| 338 | snprintf(ktimeline_name, sizeof(ktimeline_name), |
| 339 | "%s_%.15s(%d)-%.15s(%d)-%d", |
| 340 | context->device->name, |
| 341 | current->group_leader->comm, current->group_leader->pid, |
| 342 | current->comm, current->pid, context->id); |
| 343 | |
| 344 | context->timeline = sync_timeline_create(&kgsl_sync_timeline_ops, |
| 345 | (int) sizeof(struct kgsl_sync_timeline), ktimeline_name); |
| 346 | if (context->timeline == NULL) |
| 347 | return -EINVAL; |
| 348 | |
| 349 | ktimeline = (struct kgsl_sync_timeline *) context->timeline; |
| 350 | ktimeline->last_timestamp = 0; |
| 351 | ktimeline->device = context->device; |
| 352 | ktimeline->context_id = context->id; |
| 353 | |
| 354 | spin_lock_init(&ktimeline->lock); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | static void kgsl_sync_timeline_signal(struct sync_timeline *timeline, |
| 359 | unsigned int timestamp) |
| 360 | { |
| 361 | struct kgsl_sync_timeline *ktimeline = |
| 362 | (struct kgsl_sync_timeline *) timeline; |
| 363 | |
| 364 | spin_lock(&ktimeline->lock); |
| 365 | if (timestamp_cmp(timestamp, ktimeline->last_timestamp) > 0) |
| 366 | ktimeline->last_timestamp = timestamp; |
| 367 | spin_unlock(&ktimeline->lock); |
| 368 | |
| 369 | sync_timeline_signal(timeline); |
| 370 | } |
| 371 | |
| 372 | void kgsl_sync_timeline_destroy(struct kgsl_context *context) |
| 373 | { |
| 374 | sync_timeline_destroy(context->timeline); |
| 375 | } |
| 376 | |
| 377 | static void kgsl_sync_callback(struct sync_fence *fence, |
| 378 | struct sync_fence_waiter *waiter) |
| 379 | { |
| 380 | struct kgsl_sync_fence_waiter *kwaiter = |
| 381 | (struct kgsl_sync_fence_waiter *) waiter; |
| 382 | kwaiter->func(kwaiter->priv); |
| 383 | sync_fence_put(kwaiter->fence); |
| 384 | kfree(kwaiter); |
| 385 | } |
| 386 | |
| 387 | struct kgsl_sync_fence_waiter *kgsl_sync_fence_async_wait(int fd, |
| 388 | void (*func)(void *priv), void *priv) |
| 389 | { |
| 390 | struct kgsl_sync_fence_waiter *kwaiter; |
| 391 | struct sync_fence *fence; |
| 392 | int status; |
| 393 | |
| 394 | fence = sync_fence_fdget(fd); |
| 395 | if (fence == NULL) |
| 396 | return ERR_PTR(-EINVAL); |
| 397 | |
| 398 | /* create the waiter */ |
| 399 | kwaiter = kzalloc(sizeof(*kwaiter), GFP_ATOMIC); |
| 400 | if (kwaiter == NULL) { |
| 401 | sync_fence_put(fence); |
| 402 | return ERR_PTR(-ENOMEM); |
| 403 | } |
| 404 | |
| 405 | kwaiter->fence = fence; |
| 406 | kwaiter->priv = priv; |
| 407 | kwaiter->func = func; |
| 408 | |
| 409 | strlcpy(kwaiter->name, fence->name, sizeof(kwaiter->name)); |
| 410 | |
| 411 | sync_fence_waiter_init((struct sync_fence_waiter *) kwaiter, |
| 412 | kgsl_sync_callback); |
| 413 | |
| 414 | /* if status then error or signaled */ |
| 415 | status = sync_fence_wait_async(fence, |
| 416 | (struct sync_fence_waiter *) kwaiter); |
| 417 | if (status) { |
| 418 | kfree(kwaiter); |
| 419 | sync_fence_put(fence); |
| 420 | if (status < 0) |
| 421 | kwaiter = ERR_PTR(status); |
| 422 | else |
| 423 | kwaiter = NULL; |
| 424 | } |
| 425 | |
| 426 | return kwaiter; |
| 427 | } |
| 428 | |
| 429 | int kgsl_sync_fence_async_cancel(struct kgsl_sync_fence_waiter *kwaiter) |
| 430 | { |
| 431 | if (kwaiter == NULL) |
| 432 | return 0; |
| 433 | |
| 434 | if (sync_fence_cancel_async(kwaiter->fence, |
| 435 | (struct sync_fence_waiter *) kwaiter) == 0) { |
| 436 | sync_fence_put(kwaiter->fence); |
| 437 | kfree(kwaiter); |
| 438 | return 1; |
| 439 | } |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | #ifdef CONFIG_ONESHOT_SYNC |
| 444 | |
| 445 | #include "oneshot_sync.h" |
| 446 | |
| 447 | struct kgsl_syncsource { |
| 448 | struct kref refcount; |
| 449 | int id; |
| 450 | struct kgsl_process_private *private; |
| 451 | struct oneshot_sync_timeline *oneshot; |
| 452 | }; |
| 453 | |
| 454 | long kgsl_ioctl_syncsource_create(struct kgsl_device_private *dev_priv, |
| 455 | unsigned int cmd, void *data) |
| 456 | { |
| 457 | struct kgsl_syncsource *syncsource = NULL; |
| 458 | struct kgsl_syncsource_create *param = data; |
| 459 | int ret = -EINVAL; |
| 460 | int id = 0; |
| 461 | struct kgsl_process_private *private = dev_priv->process_priv; |
| 462 | char name[32]; |
| 463 | |
| 464 | syncsource = kzalloc(sizeof(*syncsource), GFP_KERNEL); |
| 465 | if (syncsource == NULL) { |
| 466 | ret = -ENOMEM; |
| 467 | goto out; |
| 468 | } |
| 469 | |
| 470 | snprintf(name, sizeof(name), "kgsl-syncsource-pid-%d", |
| 471 | current->group_leader->pid); |
| 472 | |
| 473 | syncsource->oneshot = oneshot_timeline_create(name); |
| 474 | if (syncsource->oneshot == NULL) { |
| 475 | ret = -ENOMEM; |
| 476 | goto out; |
| 477 | } |
| 478 | |
| 479 | kref_init(&syncsource->refcount); |
| 480 | syncsource->private = private; |
| 481 | |
| 482 | idr_preload(GFP_KERNEL); |
| 483 | spin_lock(&private->syncsource_lock); |
| 484 | id = idr_alloc(&private->syncsource_idr, syncsource, 1, 0, GFP_NOWAIT); |
| 485 | if (id > 0) { |
| 486 | syncsource->id = id; |
| 487 | param->id = id; |
| 488 | ret = 0; |
| 489 | } else { |
| 490 | ret = id; |
| 491 | } |
| 492 | |
| 493 | spin_unlock(&private->syncsource_lock); |
| 494 | idr_preload_end(); |
| 495 | |
| 496 | out: |
| 497 | if (ret) { |
| 498 | if (syncsource && syncsource->oneshot) |
| 499 | oneshot_timeline_destroy(syncsource->oneshot); |
| 500 | kfree(syncsource); |
| 501 | } |
| 502 | |
| 503 | return ret; |
| 504 | } |
| 505 | |
| 506 | static struct kgsl_syncsource * |
| 507 | kgsl_syncsource_get(struct kgsl_process_private *private, int id) |
| 508 | { |
| 509 | int result = 0; |
| 510 | struct kgsl_syncsource *syncsource = NULL; |
| 511 | |
| 512 | spin_lock(&private->syncsource_lock); |
| 513 | |
| 514 | syncsource = idr_find(&private->syncsource_idr, id); |
| 515 | if (syncsource) |
| 516 | result = kref_get_unless_zero(&syncsource->refcount); |
| 517 | |
| 518 | spin_unlock(&private->syncsource_lock); |
| 519 | |
| 520 | return result ? syncsource : NULL; |
| 521 | } |
| 522 | |
| 523 | static void kgsl_syncsource_destroy(struct kref *kref) |
| 524 | { |
| 525 | struct kgsl_syncsource *syncsource = container_of(kref, |
| 526 | struct kgsl_syncsource, |
| 527 | refcount); |
| 528 | |
| 529 | struct kgsl_process_private *private = syncsource->private; |
| 530 | |
| 531 | spin_lock(&private->syncsource_lock); |
| 532 | if (syncsource->id != 0) { |
| 533 | idr_remove(&private->syncsource_idr, syncsource->id); |
| 534 | syncsource->id = 0; |
| 535 | } |
| 536 | oneshot_timeline_destroy(syncsource->oneshot); |
| 537 | spin_unlock(&private->syncsource_lock); |
| 538 | |
| 539 | kfree(syncsource); |
| 540 | } |
| 541 | |
| 542 | void kgsl_syncsource_put(struct kgsl_syncsource *syncsource) |
| 543 | { |
| 544 | if (syncsource) |
| 545 | kref_put(&syncsource->refcount, kgsl_syncsource_destroy); |
| 546 | } |
| 547 | |
| 548 | long kgsl_ioctl_syncsource_destroy(struct kgsl_device_private *dev_priv, |
| 549 | unsigned int cmd, void *data) |
| 550 | { |
| 551 | struct kgsl_syncsource_destroy *param = data; |
| 552 | struct kgsl_syncsource *syncsource = NULL; |
| 553 | struct kgsl_process_private *private = dev_priv->process_priv; |
| 554 | |
| 555 | spin_lock(&private->syncsource_lock); |
| 556 | syncsource = idr_find(&private->syncsource_idr, param->id); |
| 557 | |
| 558 | if (syncsource) { |
| 559 | idr_remove(&private->syncsource_idr, param->id); |
| 560 | syncsource->id = 0; |
| 561 | } |
| 562 | |
| 563 | spin_unlock(&private->syncsource_lock); |
| 564 | |
| 565 | if (syncsource == NULL) |
| 566 | return -EINVAL; |
| 567 | |
| 568 | /* put reference from syncsource creation */ |
| 569 | kgsl_syncsource_put(syncsource); |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | long kgsl_ioctl_syncsource_create_fence(struct kgsl_device_private *dev_priv, |
| 574 | unsigned int cmd, void *data) |
| 575 | { |
| 576 | struct kgsl_syncsource_create_fence *param = data; |
| 577 | struct kgsl_syncsource *syncsource = NULL; |
| 578 | int ret = -EINVAL; |
| 579 | struct sync_fence *fence = NULL; |
| 580 | int fd = -1; |
| 581 | char name[32]; |
| 582 | |
| 583 | |
| 584 | syncsource = kgsl_syncsource_get(dev_priv->process_priv, |
| 585 | param->id); |
| 586 | if (syncsource == NULL) |
| 587 | goto out; |
| 588 | |
| 589 | snprintf(name, sizeof(name), "kgsl-syncsource-pid-%d-%d", |
| 590 | current->group_leader->pid, syncsource->id); |
| 591 | |
| 592 | fence = oneshot_fence_create(syncsource->oneshot, name); |
| 593 | if (fence == NULL) { |
| 594 | ret = -ENOMEM; |
| 595 | goto out; |
| 596 | } |
| 597 | |
| 598 | fd = get_unused_fd_flags(0); |
| 599 | if (fd < 0) { |
| 600 | ret = -EBADF; |
| 601 | goto out; |
| 602 | } |
| 603 | ret = 0; |
| 604 | |
| 605 | sync_fence_install(fence, fd); |
| 606 | |
| 607 | param->fence_fd = fd; |
| 608 | out: |
| 609 | if (ret) { |
| 610 | if (fence) |
| 611 | sync_fence_put(fence); |
| 612 | if (fd >= 0) |
| 613 | put_unused_fd(fd); |
| 614 | |
| 615 | } |
| 616 | kgsl_syncsource_put(syncsource); |
| 617 | return ret; |
| 618 | } |
| 619 | |
| 620 | long kgsl_ioctl_syncsource_signal_fence(struct kgsl_device_private *dev_priv, |
| 621 | unsigned int cmd, void *data) |
| 622 | { |
| 623 | int ret = -EINVAL; |
| 624 | struct kgsl_syncsource_signal_fence *param = data; |
| 625 | struct kgsl_syncsource *syncsource = NULL; |
| 626 | struct sync_fence *fence = NULL; |
| 627 | |
| 628 | syncsource = kgsl_syncsource_get(dev_priv->process_priv, |
| 629 | param->id); |
| 630 | if (syncsource == NULL) |
| 631 | goto out; |
| 632 | |
| 633 | fence = sync_fence_fdget(param->fence_fd); |
| 634 | if (fence == NULL) { |
| 635 | ret = -EBADF; |
| 636 | goto out; |
| 637 | } |
| 638 | |
| 639 | ret = oneshot_fence_signal(syncsource->oneshot, fence); |
| 640 | out: |
| 641 | if (fence) |
| 642 | sync_fence_put(fence); |
| 643 | kgsl_syncsource_put(syncsource); |
| 644 | return ret; |
| 645 | } |
| 646 | #endif |