diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2020-02-17 14:58:02 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2020-04-07 14:37:50 +1000 |
| commit | ed3d1489d2717a13f3b47b296bb2faa7ce4168da (patch) | |
| tree | ba6236e37fa207cc5432773063a3a7dff3041547 /drivers/gpu/drm/nouveau/include/nvif | |
| parent | 58e92b5ee8743ebb77b824cce3330521f049bbac (diff) | |
drm/nouveau/nvif: protect waits against GPU falling off the bus
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/include/nvif')
| -rw-r--r-- | drivers/gpu/drm/nouveau/include/nvif/device.h | 21 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/include/nvif/timer.h | 35 |
2 files changed, 35 insertions, 21 deletions
diff --git a/drivers/gpu/drm/nouveau/include/nvif/device.h b/drivers/gpu/drm/nouveau/include/nvif/device.h index 25d969dcf67d..c2a572c67a76 100644 --- a/drivers/gpu/drm/nouveau/include/nvif/device.h +++ b/drivers/gpu/drm/nouveau/include/nvif/device.h @@ -23,27 +23,6 @@ int nvif_device_init(struct nvif_object *, u32 handle, s32 oclass, void *, u32, void nvif_device_fini(struct nvif_device *); u64 nvif_device_time(struct nvif_device *); -/* Delay based on GPU time (ie. PTIMER). - * - * Will return -ETIMEDOUT unless the loop was terminated with 'break', - * where it will return the number of nanoseconds taken instead. - */ -#define nvif_nsec(d,n,cond...) ({ \ - struct nvif_device *_device = (d); \ - u64 _nsecs = (n), _time0 = nvif_device_time(_device); \ - s64 _taken = 0; \ - \ - do { \ - cond \ - } while (_taken = nvif_device_time(_device) - _time0, _taken < _nsecs);\ - \ - if (_taken >= _nsecs) \ - _taken = -ETIMEDOUT; \ - _taken; \ -}) -#define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond) -#define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond) - /*XXX*/ #include <subdev/bios.h> #include <subdev/fb.h> diff --git a/drivers/gpu/drm/nouveau/include/nvif/timer.h b/drivers/gpu/drm/nouveau/include/nvif/timer.h new file mode 100644 index 000000000000..57587a985c4b --- /dev/null +++ b/drivers/gpu/drm/nouveau/include/nvif/timer.h @@ -0,0 +1,35 @@ +#ifndef __NVIF_TIMER_H__ +#define __NVIF_TIMER_H__ +#include <nvif/os.h> + +struct nvif_timer_wait { + struct nvif_device *device; + u64 limit; + u64 time0; + u64 time1; + int reads; +}; + +void nvif_timer_wait_init(struct nvif_device *, u64 nsec, + struct nvif_timer_wait *); +s64 nvif_timer_wait_test(struct nvif_timer_wait *); + +/* Delay based on GPU time (ie. PTIMER). + * + * Will return -ETIMEDOUT unless the loop was terminated with 'break', + * where it will return the number of nanoseconds taken instead. + */ +#define nvif_nsec(d,n,cond...) ({ \ + struct nvif_timer_wait _wait; \ + s64 _taken = 0; \ + \ + nvif_timer_wait_init((d), (n), &_wait); \ + do { \ + cond \ + } while ((_taken = nvif_timer_wait_test(&_wait)) >= 0); \ + \ + _taken; \ +}) +#define nvif_usec(d,u,cond...) nvif_nsec((d), (u) * 1000, ##cond) +#define nvif_msec(d,m,cond...) nvif_usec((d), (m) * 1000, ##cond) +#endif |