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>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 1020faf..473f8e1 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -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;
 }