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amdkfd: Implement the Get Clock Counters IOCTL 

Signed-off-by: Evgeny Pinchuk <evgeny.pinchuk@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
This commit is contained in:
Evgeny Pinchuk 2014-07-17 01:47:58 +03:00 committed by Oded Gabbay
parent 41a286fa54
commit 4fac47c820
1 changed files with 28 additions and 1 deletions
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29
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -401,7 +401,34 @@ out:
static long kfd_ioctl_get_clock_counters(struct file *filep,
struct kfd_process *p, void __user *arg)
{
return -ENODEV;
struct kfd_ioctl_get_clock_counters_args args;
struct kfd_dev *dev;
struct timespec time;
if (copy_from_user(&args, arg, sizeof(args)))
return -EFAULT;
dev = kfd_device_by_id(args.gpu_id);
if (dev == NULL)
return -EINVAL;
/* Reading GPU clock counter from KGD */
args.gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
/* No access to rdtsc. Using raw monotonic time */
getrawmonotonic(&time);
args.cpu_clock_counter = (uint64_t)timespec_to_ns(&time);
get_monotonic_boottime(&time);
args.system_clock_counter = (uint64_t)timespec_to_ns(&time);
/* Since the counter is in nano-seconds we use 1GHz frequency */
args.system_clock_freq = 1000000000;
if (copy_to_user(arg, &args, sizeof(args)))
return -EFAULT;
return 0;
}