gpu: nvgpu: Add timeouts_disabled_refcount for enabling timeout

-timeouts will be enabled only when timeouts_disabled_refcount
 will reach 0
-timeouts_enabled debugfs will change from u32 type to file type
 to avoid race enabling/disabling timeout from debugfs and ioctl
-unify setting timeouts_enabled from debugfs and ioctl

Bug 1982434

Change-Id: I54bab778f1ae533872146dfb8d80deafd2a685c7
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1588690
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/driver_common.c b/drivers/gpu/nvgpu/common/linux/driver_common.c
index 769f7e03..edc8aca8 100644
--- a/drivers/gpu/nvgpu/common/linux/driver_common.c
+++ b/drivers/gpu/nvgpu/common/linux/driver_common.c
@@ -96,12 +96,15 @@ static void nvgpu_init_timeout(struct gk20a *g)
 {
         struct gk20a_platform *platform = dev_get_drvdata(dev_from_gk20a(g));
 
-        g->gr_idle_timeout_default = NVGPU_DEFAULT_GR_IDLE_TIMEOUT;
-        if (nvgpu_platform_is_silicon(g))
-                g->timeouts_enabled = true;
-        else if (nvgpu_platform_is_fpga(g)) {
+        g->timeouts_disabled_by_user = false;
+        nvgpu_atomic_set(&g->timeouts_disabled_refcount, 0);
+
+        if (nvgpu_platform_is_silicon(g)) {
+                g->gr_idle_timeout_default = NVGPU_DEFAULT_GR_IDLE_TIMEOUT;
+        } else if (nvgpu_platform_is_fpga(g)) {
                 g->gr_idle_timeout_default = GK20A_TIMEOUT_FPGA;
-                g->timeouts_enabled = true;
+        } else {
+                g->gr_idle_timeout_default = (u32)ULONG_MAX;
         }
         g->ch_wdt_timeout_ms = platform->ch_wdt_timeout_ms;
 }