gpu: nvgpu: add debug events in open and ioctl

Add debug events for measuring the duration of gk20a channel open and
channel ioctl calls.

Bug 200035111

Change-Id: Ib4837c745e73ee1690814d60bdca021821567153
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/538768
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
index 39a37f6f..0b3b0202 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.c
@@ -817,7 +817,13 @@ int gk20a_channel_open(struct inode *inode, struct file *filp)
 {
         struct gk20a *g = container_of(inode->i_cdev,
                         struct gk20a, channel.cdev);
-        return __gk20a_channel_open(g, filp);
+        int ret;
+
+        gk20a_dbg_fn("start");
+        ret = __gk20a_channel_open(g, filp);
+
+        gk20a_dbg_fn("end");
+        return ret;
 }
 
 /* allocate private cmd buffer.
@@ -2201,6 +2207,8 @@ long gk20a_channel_ioctl(struct file *filp,
         u8 buf[NVHOST_IOCTL_CHANNEL_MAX_ARG_SIZE];
         int err = 0;
 
+        gk20a_dbg_fn("start %d", _IOC_NR(cmd));
+
         if ((_IOC_TYPE(cmd) != NVHOST_IOCTL_MAGIC) ||
                 (_IOC_NR(cmd) == 0) ||
                 (_IOC_NR(cmd) > NVHOST_IOCTL_CHANNEL_LAST) ||
@@ -2444,5 +2452,7 @@ long gk20a_channel_ioctl(struct file *filp,
         if ((err == 0) && (_IOC_DIR(cmd) & _IOC_READ))
                 err = copy_to_user((void __user *)arg, buf, _IOC_SIZE(cmd));
 
+        gk20a_dbg_fn("end");
+
         return err;
 }