LXR linux/drivers/gpu/drm/nouveau/include/nvkm/subdev/timer.h

   1/* SPDX-License-Identifier: MIT */
   2#ifndef __NVKM_TIMER_H__
   3#define __NVKM_TIMER_H__
   4#include <core/subdev.h>
   5
   6struct nvkm_alarm {
   7        struct list_head head;
   8        struct list_head exec;
   9        u64 timestamp;
  10        void (*func)(struct nvkm_alarm *);
  11};
  12
  13static inline void
  14nvkm_alarm_init(struct nvkm_alarm *alarm, void (*func)(struct nvkm_alarm *))
  15{
  16        INIT_LIST_HEAD(&alarm->head);
  17        alarm->func = func;
  18}
  19
  20struct nvkm_timer {
  21        const struct nvkm_timer_func *func;
  22        struct nvkm_subdev subdev;
  23
  24        struct list_head alarms;
  25        spinlock_t lock;
  26};
  27
  28u64 nvkm_timer_read(struct nvkm_timer *);
  29void nvkm_timer_alarm(struct nvkm_timer *, u32 nsec, struct nvkm_alarm *);
  30
  31struct nvkm_timer_wait {
  32        struct nvkm_timer *tmr;
  33        u64 limit;
  34        u64 time0;
  35        u64 time1;
  36        int reads;
  37};
  38
  39void nvkm_timer_wait_init(struct nvkm_device *, u64 nsec,
  40                          struct nvkm_timer_wait *);
  41s64 nvkm_timer_wait_test(struct nvkm_timer_wait *);
  42
  43/* Delay based on GPU time (ie. PTIMER).
  44 *
  45 * Will return -ETIMEDOUT unless the loop was terminated with 'break',
  46 * where it will return the number of nanoseconds taken instead.
  47 *
  48 * NVKM_DELAY can be passed for 'cond' to disable the timeout warning,
  49 * which is useful for unconditional delay loops.
  50 */
  51#define NVKM_DELAY _warn = false;
  52#define nvkm_nsec(d,n,cond...) ({                                              \
  53        struct nvkm_timer_wait _wait;                                          \
  54        bool _warn = true;                                                     \
  55        s64 _taken = 0;                                                        \
  56                                                                               \
  57        nvkm_timer_wait_init((d), (n), &_wait);                                \
  58        do {                                                                   \
  59                cond                                                           \
  60        } while ((_taken = nvkm_timer_wait_test(&_wait)) >= 0);                \
  61                                                                               \
  62        if (_warn && _taken < 0)                                               \
  63                dev_WARN(_wait.tmr->subdev.device->dev, "timeout\n");          \
  64        _taken;                                                                \
  65})
  66#define nvkm_usec(d, u, cond...) nvkm_nsec((d), (u) * 1000ULL, ##cond)
  67#define nvkm_msec(d, m, cond...) nvkm_usec((d), (m) * 1000ULL, ##cond)
  68
  69#define nvkm_wait_nsec(d,n,addr,mask,data)                                     \
  70        nvkm_nsec(d, n,                                                        \
  71                if ((nvkm_rd32(d, (addr)) & (mask)) == (data))                 \
  72                        break;                                                 \
  73                )
  74#define nvkm_wait_usec(d,u,addr,mask,data)                                     \
  75        nvkm_wait_nsec((d), (u) * 1000, (addr), (mask), (data))
  76#define nvkm_wait_msec(d,m,addr,mask,data)                                     \
  77        nvkm_wait_usec((d), (m) * 1000, (addr), (mask), (data))
  78
  79int nv04_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);
  80int nv40_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);
  81int nv41_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);
  82int gk20a_timer_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_timer **);
  83#endif
  84