drivers/gpu/drm/nouveau/include/nvif/timer.h

   1 #ifndef __NVIF_TIMER_H__
   2 #define __NVIF_TIMER_H__
   3 #include <nvif/os.h>
   4
   5 struct nvif_timer_wait {
   6         struct nvif_device *device;
   7         u64 limit;
   8         u64 time0;
   9         u64 time1;
  10         int reads;
  11 };
  12
  13 void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
  14                           struct nvif_timer_wait *);
  15 s64 nvif_timer_wait_test(struct nvif_timer_wait *);
  16
  17 /* Delay based on GPU time (ie. PTIMER).
  18  *
  19  * Will return -ETIMEDOUT unless the loop was terminated with 'break',
  20  * where it will return the number of nanoseconds taken instead.
  21  */
  22 #define nvif_nsec(d,n,cond...) ({                                              \
  23         struct nvif_timer_wait _wait;                                          \
  24         s64 _taken = 0;                                                        \
  25                                                                                \
  26         nvif_timer_wait_init((d), (n), &_wait);                                \
  27         do {                                                                   \
  28                 cond                                                           \
  29         } while ((_taken = nvif_timer_wait_test(&_wait)) >= 0);                \
  30                                                                                \
  31         _taken;                                                                \
  32 })
  33 #define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond)
  34 #define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond)
  35 #endif