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

   1#ifndef __NVIF_TIMER_H__
   2#define __NVIF_TIMER_H__
   3#include <nvif/os.h>
   4
   5struct nvif_timer_wait {
   6        struct nvif_device *device;
   7        u64 limit;
   8        u64 time0;
   9        u64 time1;
  10        int reads;
  11};
  12
  13void nvif_timer_wait_init(struct nvif_device *, u64 nsec,
  14                          struct nvif_timer_wait *);
  15s64 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
  36