gpu: nvgpu: Abstraction for *sleep, *delay

Add abstractions for the following:

  msleep()
  udelay()
  usleep_range()

These functions are only a subset of the available Linux delay and sleep
functions but this seems to be what we use and what is actually useful
for driver development.

Bug 1799159
Jira NVGPU-16

Change-Id: I1a25b66314f365432f2f0a5ff1b3a0a5689fc047
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1309087
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-by: David Martinez Nieto <dmartineznie@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/include/nvgpu/timers.h b/drivers/gpu/nvgpu/include/nvgpu/timers.h
index abf8b736..0aadd0df 100644
--- a/drivers/gpu/nvgpu/include/nvgpu/timers.h
+++ b/drivers/gpu/nvgpu/include/nvgpu/timers.h
@@ -89,4 +89,12 @@ int nvgpu_timeout_peek_expired(struct nvgpu_timeout *timeout);
 int __nvgpu_timeout_expired_msg(struct nvgpu_timeout *timeout,
                               void *caller, const char *fmt, ...);
 
+
+/*
+ * Waits and delays.
+ */
+void nvgpu_msleep(unsigned int msecs);
+void nvgpu_usleep_range(unsigned int min_us, unsigned int max_us);
+void nvgpu_udelay(unsigned int usecs);
+
 #endif