drivers/misc/mediatek/gpu/mt8127/mali/mali/linux/mali_sync.c

   1 /*
   2  * This confidential and proprietary software may be used only as
   3  * authorised by a licensing agreement from ARM Limited
   4  * (C) COPYRIGHT 2012-2015 ARM Limited
   5  * ALL RIGHTS RESERVED
   6  * The entire notice above must be reproduced on all authorised
   7  * copies and copies may only be made to the extent permitted
   8  * by a licensing agreement from ARM Limited.
   9  */
  10
  11 #include "mali_sync.h"
  12
  13 #include "mali_osk.h"
  14 #include "mali_kernel_common.h"
  15 #include "mali_timeline.h"
  16 #include "mali_executor.h"
  17
  18 #include <linux/file.h>
  19 #include <linux/seq_file.h>
  20 #include <linux/module.h>
  21
  22 struct mali_sync_pt {
  23         struct sync_pt         sync_pt;
  24         struct mali_sync_flag *flag;
  25         struct sync_timeline *sync_tl;  /**< Sync timeline this pt is connected to. */
  26 };
  27
  28 /**
  29  * The sync flag is used to connect sync fences to the Mali Timeline system.  Sync fences can be
  30  * created from a sync flag, and when the flag is signaled, the sync fences will also be signaled.
  31  */
  32 struct mali_sync_flag {
  33         struct sync_timeline *sync_tl;  /**< Sync timeline this flag is connected to. */
  34         u32                   point;    /**< Point on timeline. */
  35         int                   status;   /**< 0 if unsignaled, 1 if signaled without error or negative if signaled with error. */
  36         struct kref           refcount; /**< Reference count. */
  37 };
  38
  39 /**
  40  * Mali sync timeline is used to connect mali timeline to sync_timeline.
  41  * When fence timeout can print more detailed mali timeline system info.
  42  */
  43 struct mali_sync_timeline_container {
  44         struct sync_timeline sync_timeline;
  45         struct mali_timeline *timeline;
  46 };
  47
  48 MALI_STATIC_INLINE struct mali_sync_pt *to_mali_sync_pt(struct sync_pt *pt)
  49 {
  50         return container_of(pt, struct mali_sync_pt, sync_pt);
  51 }
  52
  53 MALI_STATIC_INLINE struct mali_sync_timeline_container *to_mali_sync_tl_container(struct sync_timeline *sync_tl)
  54 {
  55         return container_of(sync_tl, struct mali_sync_timeline_container, sync_timeline);
  56 }
  57
  58 static struct sync_pt *timeline_dup(struct sync_pt *pt)
  59 {
  60         struct mali_sync_pt *mpt, *new_mpt;
  61         struct sync_pt *new_pt;
  62
  63         MALI_DEBUG_ASSERT_POINTER(pt);
  64         mpt = to_mali_sync_pt(pt);
  65
  66         new_pt = sync_pt_create(mpt->sync_tl, sizeof(struct mali_sync_pt));
  67         if (NULL == new_pt) return NULL;
  68
  69         new_mpt = to_mali_sync_pt(new_pt);
  70
  71         mali_sync_flag_get(mpt->flag);
  72         new_mpt->flag = mpt->flag;
  73         new_mpt->sync_tl = mpt->sync_tl;
  74
  75         return new_pt;
  76 }
  77
  78 static int timeline_has_signaled(struct sync_pt *pt)
  79 {
  80         struct mali_sync_pt *mpt;
  81
  82         MALI_DEBUG_ASSERT_POINTER(pt);
  83         mpt = to_mali_sync_pt(pt);
  84
  85         MALI_DEBUG_ASSERT_POINTER(mpt->flag);
  86
  87         return mpt->flag->status;
  88 }
  89
  90 static int timeline_compare(struct sync_pt *pta, struct sync_pt *ptb)
  91 {
  92         struct mali_sync_pt *mpta;
  93         struct mali_sync_pt *mptb;
  94         u32 a, b;
  95
  96         MALI_DEBUG_ASSERT_POINTER(pta);
  97         MALI_DEBUG_ASSERT_POINTER(ptb);
  98         mpta = to_mali_sync_pt(pta);
  99         mptb = to_mali_sync_pt(ptb);
 100
 101         MALI_DEBUG_ASSERT_POINTER(mpta->flag);
 102         MALI_DEBUG_ASSERT_POINTER(mptb->flag);
 103
 104         a = mpta->flag->point;
 105         b = mptb->flag->point;
 106
 107         if (a == b) return 0;
 108
 109         return ((b - a) < (a - b) ? -1 : 1);
 110 }
 111
 112 static void timeline_free_pt(struct sync_pt *pt)
 113 {
 114         struct mali_sync_pt *mpt;
 115
 116         MALI_DEBUG_ASSERT_POINTER(pt);
 117         mpt = to_mali_sync_pt(pt);
 118
 119         mali_sync_flag_put(mpt->flag);
 120 }
 121
 122 static void timeline_release(struct sync_timeline *sync_timeline)
 123 {
 124         struct mali_sync_timeline_container *mali_sync_tl = NULL;
 125         struct mali_timeline *mali_tl = NULL;
 126
 127         MALI_DEBUG_ASSERT_POINTER(sync_timeline);
 128
 129         mali_sync_tl = to_mali_sync_tl_container(sync_timeline);
 130         MALI_DEBUG_ASSERT_POINTER(mali_sync_tl);
 131
 132         mali_tl = mali_sync_tl->timeline;
 133
 134         /* always signaled timeline didn't have mali container */
 135         if (mali_tl) {
 136                 if (NULL != mali_tl->spinlock) {
 137                         mali_spinlock_reentrant_term(mali_tl->spinlock);
 138                 }
 139                 _mali_osk_free(mali_tl);
 140         }
 141
 142         module_put(THIS_MODULE);
 143 }
 144
 145 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
 146 static void timeline_print_pt(struct seq_file *s, struct sync_pt *sync_pt)
 147 {
 148         struct mali_sync_pt *mpt;
 149
 150         MALI_DEBUG_ASSERT_POINTER(s);
 151         MALI_DEBUG_ASSERT_POINTER(sync_pt);
 152
 153         mpt = to_mali_sync_pt(sync_pt);
 154
 155         /* It is possible this sync point is just under construct,
 156          * make sure the flag is valid before accessing it
 157         */
 158         if (mpt->flag) {
 159                 seq_printf(s, "%u", mpt->flag->point);
 160         } else {
 161                 seq_printf(s, "uninitialized");
 162         }
 163 }
 164
 165 static void timeline_print_obj(struct seq_file *s, struct sync_timeline *sync_tl)
 166 {
 167         struct mali_sync_timeline_container *mali_sync_tl = NULL;
 168         struct mali_timeline *mali_tl = NULL;
 169
 170         MALI_DEBUG_ASSERT_POINTER(sync_tl);
 171
 172         mali_sync_tl = to_mali_sync_tl_container(sync_tl);
 173         MALI_DEBUG_ASSERT_POINTER(mali_sync_tl);
 174
 175         mali_tl = mali_sync_tl->timeline;
 176
 177         if (NULL != mali_tl) {
 178                 seq_printf(s, "oldest (%u) ", mali_tl->point_oldest);
 179                 seq_printf(s, "next (%u)", mali_tl->point_next);
 180                 seq_printf(s, "\n");
 181
 182 #if defined(MALI_TIMELINE_DEBUG_FUNCTIONS)
 183                 {
 184                         u32 tid = _mali_osk_get_tid();
 185                         struct mali_timeline_system *system = mali_tl->system;
 186
 187                         mali_spinlock_reentrant_wait(mali_tl->spinlock, tid);
 188                         if (!mali_tl->destroyed) {
 189                                 mali_spinlock_reentrant_wait(system->spinlock, tid);
 190                                 mali_timeline_debug_print_timeline(mali_tl, s);
 191                                 mali_spinlock_reentrant_signal(system->spinlock, tid);
 192                         }
 193                         mali_spinlock_reentrant_signal(mali_tl->spinlock, tid);
 194
 195                         /* dump job queue status and group running status */
 196                         mali_executor_status_dump();
 197                 }
 198 #endif
 199         }
 200 }
 201 #else
 202 static void timeline_pt_value_str(struct sync_pt *pt, char *str, int size)
 203 {
 204         struct mali_sync_pt *mpt;
 205
 206         MALI_DEBUG_ASSERT_POINTER(str);
 207         MALI_DEBUG_ASSERT_POINTER(pt);
 208
 209         mpt = to_mali_sync_pt(pt);
 210
 211         /* It is possible this sync point is just under construct,
 212          * make sure the flag is valid before accessing it
 213         */
 214         if (mpt->flag) {
 215                 _mali_osk_snprintf(str, size, "%u", mpt->flag->point);
 216         } else {
 217                 _mali_osk_snprintf(str, size, "uninitialized");
 218         }
 219 }
 220
 221 static void timeline_value_str(struct sync_timeline *timeline, char *str, int size)
 222 {
 223         struct mali_sync_timeline_container *mali_sync_tl = NULL;
 224         struct mali_timeline *mali_tl = NULL;
 225
 226         MALI_DEBUG_ASSERT_POINTER(timeline);
 227
 228         mali_sync_tl = to_mali_sync_tl_container(timeline);
 229         MALI_DEBUG_ASSERT_POINTER(mali_sync_tl);
 230
 231         mali_tl = mali_sync_tl->timeline;
 232
 233         if (NULL != mali_tl) {
 234                 _mali_osk_snprintf(str, size, "oldest (%u) ", mali_tl->point_oldest);
 235                 _mali_osk_snprintf(str, size, "next (%u)", mali_tl->point_next);
 236                 _mali_osk_snprintf(str, size, "\n");
 237
 238 #if defined(MALI_TIMELINE_DEBUG_FUNCTIONS)
 239                 {
 240                         u32 tid = _mali_osk_get_tid();
 241                         struct mali_timeline_system *system = mali_tl->system;
 242
 243                         mali_spinlock_reentrant_wait(mali_tl->spinlock, tid);
 244                         if (!mali_tl->destroyed) {
 245                                 mali_spinlock_reentrant_wait(system->spinlock, tid);
 246                                 mali_timeline_debug_direct_print_timeline(mali_tl);
 247                                 mali_spinlock_reentrant_signal(system->spinlock, tid);
 248                         }
 249                         mali_spinlock_reentrant_signal(mali_tl->spinlock, tid);
 250
 251                         /* dump job queue status and group running status */
 252                         mali_executor_status_dump();
 253                 }
 254 #endif
 255         }
 256 }
 257 #endif
 258
 259
 260 static struct sync_timeline_ops mali_timeline_ops = {
 261         .driver_name    = "Mali",
 262         .dup            = timeline_dup,
 263         .has_signaled   = timeline_has_signaled,
 264         .compare        = timeline_compare,
 265         .free_pt        = timeline_free_pt,
 266         .release_obj    = timeline_release,
 267 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
 268         .print_pt       = timeline_print_pt,
 269         .print_obj      = timeline_print_obj,
 270 #else
 271         .pt_value_str = timeline_pt_value_str,
 272         .timeline_value_str = timeline_value_str,
 273 #endif
 274 };
 275
 276 struct sync_timeline *mali_sync_timeline_create(struct mali_timeline *timeline, const char *name)
 277 {
 278         struct sync_timeline *sync_tl;
 279         struct mali_sync_timeline_container *mali_sync_tl;
 280
 281         sync_tl = sync_timeline_create(&mali_timeline_ops, sizeof(struct mali_sync_timeline_container), name);
 282         if (NULL == sync_tl) return NULL;
 283
 284         mali_sync_tl = to_mali_sync_tl_container(sync_tl);
 285         mali_sync_tl->timeline = timeline;
 286
 287         /* Grab a reference on the module to ensure the callbacks are present
 288          * as long some timeline exists. The reference is released when the
 289          * timeline is freed.
 290          * Since this function is called from a ioctl on an open file we know
 291          * we already have a reference, so using __module_get is safe. */
 292         __module_get(THIS_MODULE);
 293
 294         return sync_tl;
 295 }
 296
 297 s32 mali_sync_fence_fd_alloc(struct sync_fence *sync_fence)
 298 {
 299         s32 fd = -1;
 300
 301         fd = get_unused_fd();
 302         if (fd < 0) {
 303                 sync_fence_put(sync_fence);
 304                 return -1;
 305         }
 306         sync_fence_install(sync_fence, fd);
 307
 308         return fd;
 309 }
 310
 311 struct sync_fence *mali_sync_fence_merge(struct sync_fence *sync_fence1, struct sync_fence *sync_fence2)
 312 {
 313         struct sync_fence *sync_fence;
 314
 315         MALI_DEBUG_ASSERT_POINTER(sync_fence1);
 316         MALI_DEBUG_ASSERT_POINTER(sync_fence1);
 317
 318         sync_fence = sync_fence_merge("mali_merge_fence", sync_fence1, sync_fence2);
 319         sync_fence_put(sync_fence1);
 320         sync_fence_put(sync_fence2);
 321
 322         return sync_fence;
 323 }
 324
 325 struct sync_fence *mali_sync_timeline_create_signaled_fence(struct sync_timeline *sync_tl)
 326 {
 327         struct mali_sync_flag *flag;
 328         struct sync_fence *sync_fence;
 329
 330         MALI_DEBUG_ASSERT_POINTER(sync_tl);
 331
 332         flag = mali_sync_flag_create(sync_tl, 0);
 333         if (NULL == flag) return NULL;
 334
 335         sync_fence = mali_sync_flag_create_fence(flag);
 336
 337         mali_sync_flag_signal(flag, 0);
 338         mali_sync_flag_put(flag);
 339
 340         return sync_fence;
 341 }
 342
 343 struct mali_sync_flag *mali_sync_flag_create(struct sync_timeline *sync_tl, mali_timeline_point point)
 344 {
 345         struct mali_sync_flag *flag;
 346
 347         if (NULL == sync_tl) return NULL;
 348
 349         flag = _mali_osk_calloc(1, sizeof(*flag));
 350         if (NULL == flag) return NULL;
 351
 352         flag->sync_tl = sync_tl;
 353         flag->point = point;
 354
 355         flag->status = 0;
 356         kref_init(&flag->refcount);
 357
 358         return flag;
 359 }
 360
 361 void mali_sync_flag_get(struct mali_sync_flag *flag)
 362 {
 363         MALI_DEBUG_ASSERT_POINTER(flag);
 364         kref_get(&flag->refcount);
 365 }
 366
 367 /**
 368  * Free sync flag.
 369  *
 370  * @param ref kref object embedded in sync flag that should be freed.
 371  */
 372 static void mali_sync_flag_free(struct kref *ref)
 373 {
 374         struct mali_sync_flag *flag;
 375
 376         MALI_DEBUG_ASSERT_POINTER(ref);
 377         flag = container_of(ref, struct mali_sync_flag, refcount);
 378
 379         _mali_osk_free(flag);
 380 }
 381
 382 void mali_sync_flag_put(struct mali_sync_flag *flag)
 383 {
 384         MALI_DEBUG_ASSERT_POINTER(flag);
 385         kref_put(&flag->refcount, mali_sync_flag_free);
 386 }
 387
 388 void mali_sync_flag_signal(struct mali_sync_flag *flag, int error)
 389 {
 390         MALI_DEBUG_ASSERT_POINTER(flag);
 391
 392         MALI_DEBUG_ASSERT(0 == flag->status);
 393         flag->status = (0 > error) ? error : 1;
 394
 395         _mali_osk_write_mem_barrier();
 396
 397         sync_timeline_signal(flag->sync_tl);
 398 }
 399
 400 /**
 401  * Create a sync point attached to given sync flag.
 402  *
 403  * @note Sync points must be triggered in *exactly* the same order as they are created.
 404  *
 405  * @param flag Sync flag.
 406  * @return New sync point if successful, NULL if not.
 407  */
 408 static struct sync_pt *mali_sync_flag_create_pt(struct mali_sync_flag *flag)
 409 {
 410         struct sync_pt *pt;
 411         struct mali_sync_pt *mpt;
 412
 413         MALI_DEBUG_ASSERT_POINTER(flag);
 414         MALI_DEBUG_ASSERT_POINTER(flag->sync_tl);
 415
 416         pt = sync_pt_create(flag->sync_tl, sizeof(struct mali_sync_pt));
 417         if (NULL == pt) return NULL;
 418
 419         mali_sync_flag_get(flag);
 420
 421         mpt = to_mali_sync_pt(pt);
 422         mpt->flag = flag;
 423         mpt->sync_tl = flag->sync_tl;
 424
 425         return pt;
 426 }
 427
 428 struct sync_fence *mali_sync_flag_create_fence(struct mali_sync_flag *flag)
 429 {
 430         struct sync_pt    *sync_pt;
 431         struct sync_fence *sync_fence;
 432
 433         MALI_DEBUG_ASSERT_POINTER(flag);
 434         MALI_DEBUG_ASSERT_POINTER(flag->sync_tl);
 435
 436         sync_pt = mali_sync_flag_create_pt(flag);
 437         if (NULL == sync_pt) return NULL;
 438
 439         sync_fence = sync_fence_create("mali_flag_fence", sync_pt);
 440         if (NULL == sync_fence) {
 441                 sync_pt_free(sync_pt);
 442                 return NULL;
 443         }
 444
 445         return sync_fence;
 446 }