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 2012-2013 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
  17 #include <linux/file.h>
  18 #include <linux/seq_file.h>
  19 #include <linux/module.h>
  20
  21 struct mali_sync_pt {
  22         struct sync_pt         sync_pt;
  23         struct mali_sync_flag *flag;
  24 };
  25
  26 /**
  27  * The sync flag is used to connect sync fences to the Mali Timeline system.  Sync fences can be
  28  * created from a sync flag, and when the flag is signaled, the sync fences will also be signaled.
  29  */
  30 struct mali_sync_flag {
  31         struct sync_timeline *sync_tl;  /**< Sync timeline this flag is connected to. */
  32         u32                   point;    /**< Point on timeline. */
  33         int                   status;   /**< 0 if unsignaled, 1 if signaled without error or negative if signaled with error. */
  34         struct kref           refcount; /**< Reference count. */
  35 };
  36
  37 MALI_STATIC_INLINE struct mali_sync_pt *to_mali_sync_pt(struct sync_pt *pt)
  38 {
  39         return container_of(pt, struct mali_sync_pt, sync_pt);
  40 }
  41
  42 static struct sync_pt *timeline_dup(struct sync_pt *pt)
  43 {
  44         struct mali_sync_pt *mpt, *new_mpt;
  45         struct sync_pt *new_pt;
  46
  47         MALI_DEBUG_ASSERT_POINTER(pt);
  48         mpt = to_mali_sync_pt(pt);
  49
  50         new_pt = sync_pt_create(pt->parent, sizeof(struct mali_sync_pt));
  51         if (NULL == new_pt) return NULL;
  52
  53         new_mpt = to_mali_sync_pt(new_pt);
  54
  55         mali_sync_flag_get(mpt->flag);
  56         new_mpt->flag = mpt->flag;
  57
  58         return new_pt;
  59 }
  60
  61 static int timeline_has_signaled(struct sync_pt *pt)
  62 {
  63         struct mali_sync_pt *mpt;
  64
  65         MALI_DEBUG_ASSERT_POINTER(pt);
  66         mpt = to_mali_sync_pt(pt);
  67
  68         MALI_DEBUG_ASSERT_POINTER(mpt->flag);
  69
  70         return mpt->flag->status;
  71 }
  72
  73 static int timeline_compare(struct sync_pt *pta, struct sync_pt *ptb)
  74 {
  75         struct mali_sync_pt *mpta;
  76         struct mali_sync_pt *mptb;
  77         u32 a, b;
  78
  79         MALI_DEBUG_ASSERT_POINTER(pta);
  80         MALI_DEBUG_ASSERT_POINTER(ptb);
  81         mpta = to_mali_sync_pt(pta);
  82         mptb = to_mali_sync_pt(ptb);
  83
  84         MALI_DEBUG_ASSERT_POINTER(mpta->flag);
  85         MALI_DEBUG_ASSERT_POINTER(mptb->flag);
  86
  87         a = mpta->flag->point;
  88         b = mpta->flag->point;
  89
  90         if (a == b) return 0;
  91
  92         return ((b - a) < (a - b) ? -1 : 1);
  93 }
  94
  95 static void timeline_free_pt(struct sync_pt *pt)
  96 {
  97         struct mali_sync_pt *mpt;
  98
  99         MALI_DEBUG_ASSERT_POINTER(pt);
 100         mpt = to_mali_sync_pt(pt);
 101
 102         mali_sync_flag_put(mpt->flag);
 103 }
 104
 105 static void timeline_release(struct sync_timeline *sync_timeline)
 106 {
 107         module_put(THIS_MODULE);
 108 }
 109
 110 static void timeline_print_pt(struct seq_file *s, struct sync_pt *sync_pt)
 111 {
 112         struct mali_sync_pt *mpt;
 113
 114         MALI_DEBUG_ASSERT_POINTER(s);
 115         MALI_DEBUG_ASSERT_POINTER(sync_pt);
 116
 117         mpt = to_mali_sync_pt(sync_pt);
 118         MALI_DEBUG_ASSERT_POINTER(mpt->flag);
 119
 120         seq_printf(s, "%u", mpt->flag->point);
 121 }
 122
 123 static struct sync_timeline_ops mali_timeline_ops = {
 124         .driver_name    = "Mali",
 125         .dup            = timeline_dup,
 126         .has_signaled   = timeline_has_signaled,
 127         .compare        = timeline_compare,
 128         .free_pt        = timeline_free_pt,
 129         .release_obj    = timeline_release,
 130         .print_pt       = timeline_print_pt,
 131 };
 132
 133 struct sync_timeline *mali_sync_timeline_create(const char *name)
 134 {
 135         struct sync_timeline *sync_tl;
 136
 137         sync_tl = sync_timeline_create(&mali_timeline_ops, sizeof(struct sync_timeline), name);
 138         if (NULL == sync_tl) return NULL;
 139
 140         /* Grab a reference on the module to ensure the callbacks are present
 141          * as long some timeline exists. The reference is released when the
 142          * timeline is freed.
 143          * Since this function is called from a ioctl on an open file we know
 144          * we already have a reference, so using __module_get is safe. */
 145         __module_get(THIS_MODULE);
 146
 147         return sync_tl;
 148 }
 149
 150 mali_bool mali_sync_timeline_is_ours(struct sync_timeline *sync_tl)
 151 {
 152         MALI_DEBUG_ASSERT_POINTER(sync_tl);
 153         return (sync_tl->ops == &mali_timeline_ops) ? MALI_TRUE : MALI_FALSE;
 154 }
 155
 156 s32 mali_sync_fence_fd_alloc(struct sync_fence *sync_fence)
 157 {
 158         s32 fd = -1;
 159
 160         fd = get_unused_fd();
 161         if (fd < 0) {
 162                 sync_fence_put(sync_fence);
 163                 MALI_DEBUG_PRINT(1, ("get_unused_fd() got fd < 0, fd=%x\n", fd));
 164                 return -1;
 165         }
 166         sync_fence_install(sync_fence, fd);
 167
 168         return fd;
 169 }
 170
 171 struct sync_fence *mali_sync_fence_merge(struct sync_fence *sync_fence1, struct sync_fence *sync_fence2)
 172 {
 173         struct sync_fence *sync_fence;
 174
 175         MALI_DEBUG_ASSERT_POINTER(sync_fence1);
 176         MALI_DEBUG_ASSERT_POINTER(sync_fence1);
 177
 178         sync_fence = sync_fence_merge("mali_merge_fence", sync_fence1, sync_fence2);
 179         sync_fence_put(sync_fence1);
 180         sync_fence_put(sync_fence2);
 181
 182         return sync_fence;
 183 }
 184
 185 struct sync_fence *mali_sync_timeline_create_signaled_fence(struct sync_timeline *sync_tl)
 186 {
 187         struct mali_sync_flag *flag;
 188         struct sync_fence *sync_fence;
 189
 190         MALI_DEBUG_ASSERT_POINTER(sync_tl);
 191
 192         flag = mali_sync_flag_create(sync_tl, 0);
 193         if (NULL == flag) return NULL;
 194
 195         sync_fence = mali_sync_flag_create_fence(flag);
 196
 197         mali_sync_flag_signal(flag, 0);
 198         mali_sync_flag_put(flag);
 199
 200         return sync_fence;
 201 }
 202
 203 struct mali_sync_flag *mali_sync_flag_create(struct sync_timeline *sync_tl, mali_timeline_point point)
 204 {
 205         struct mali_sync_flag *flag;
 206
 207         if (NULL == sync_tl) return NULL;
 208
 209         flag = _mali_osk_calloc(1, sizeof(*flag));
 210         if (NULL == flag) return NULL;
 211
 212         flag->sync_tl = sync_tl;
 213         flag->point = point;
 214
 215         flag->status = 0;
 216         kref_init(&flag->refcount);
 217
 218         return flag;
 219 }
 220
 221 void mali_sync_flag_get(struct mali_sync_flag *flag)
 222 {
 223         MALI_DEBUG_ASSERT_POINTER(flag);
 224         kref_get(&flag->refcount);
 225 }
 226
 227 /**
 228  * Free sync flag.
 229  *
 230  * @param ref kref object embedded in sync flag that should be freed.
 231  */
 232 static void mali_sync_flag_free(struct kref *ref)
 233 {
 234         struct mali_sync_flag *flag;
 235
 236         MALI_DEBUG_ASSERT_POINTER(ref);
 237         flag = container_of(ref, struct mali_sync_flag, refcount);
 238
 239         _mali_osk_free(flag);
 240 }
 241
 242 void mali_sync_flag_put(struct mali_sync_flag *flag)
 243 {
 244         MALI_DEBUG_ASSERT_POINTER(flag);
 245         kref_put(&flag->refcount, mali_sync_flag_free);
 246 }
 247
 248 void mali_sync_flag_signal(struct mali_sync_flag *flag, int error)
 249 {
 250         MALI_DEBUG_ASSERT_POINTER(flag);
 251
 252         MALI_DEBUG_ASSERT(0 == flag->status);
 253         flag->status = (0 > error) ? error : 1;
 254
 255         _mali_osk_write_mem_barrier();
 256
 257         sync_timeline_signal(flag->sync_tl);
 258 }
 259
 260 /**
 261  * Create a sync point attached to given sync flag.
 262  *
 263  * @note Sync points must be triggered in *exactly* the same order as they are created.
 264  *
 265  * @param flag Sync flag.
 266  * @return New sync point if successful, NULL if not.
 267  */
 268 static struct sync_pt *mali_sync_flag_create_pt(struct mali_sync_flag *flag)
 269 {
 270         struct sync_pt *pt;
 271         struct mali_sync_pt *mpt;
 272
 273         MALI_DEBUG_ASSERT_POINTER(flag);
 274         MALI_DEBUG_ASSERT_POINTER(flag->sync_tl);
 275
 276         pt = sync_pt_create(flag->sync_tl, sizeof(struct mali_sync_pt));
 277         if (NULL == pt) return NULL;
 278
 279         mali_sync_flag_get(flag);
 280
 281         mpt = to_mali_sync_pt(pt);
 282         mpt->flag = flag;
 283
 284         return pt;
 285 }
 286
 287 struct sync_fence *mali_sync_flag_create_fence(struct mali_sync_flag *flag)
 288 {
 289         struct sync_pt    *sync_pt;
 290         struct sync_fence *sync_fence;
 291
 292         MALI_DEBUG_ASSERT_POINTER(flag);
 293         MALI_DEBUG_ASSERT_POINTER(flag->sync_tl);
 294
 295         sync_pt = mali_sync_flag_create_pt(flag);
 296         if (NULL == sync_pt) return NULL;
 297
 298         sync_fence = sync_fence_create("mali_flag_fence", sync_pt);
 299         if (NULL == sync_fence) {
 300                 sync_pt_free(sync_pt);
 301                 return NULL;
 302         }
 303
 304         return sync_fence;
 305 }