From 79b37d78320bf050a90b3daf3a464f93cad17d7d Mon Sep 17 00:00:00 2001
From: Sagar Kamble <skamble@nvidia.com>
Date: Fri, 25 Feb 2022 16:47:50 +0530
Subject: [PATCH] gpu: nvgpu: dump debug info on semaphore acquire timeout

Channel RAMFC has details about the semaphore operation the channel
is performing. Getting this can be helpful in debugging the semaph-
ore acquire timeout.

Add gk20a_debug_dump to pbdma interrupt handler for this case.

Bug 3430929

Change-Id: Ia5e3b191a77a7e54d02f45ed2d1beb266905b564
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2675344
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
GVS: Gerrit_Virtual_Submit
---
 drivers/gpu/nvgpu/hal/fifo/pbdma_ga10b_fusa.c | 3 +++
 drivers/gpu/nvgpu/hal/fifo/pbdma_gm20b_fusa.c | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/nvgpu/hal/fifo/pbdma_ga10b_fusa.c b/drivers/gpu/nvgpu/hal/fifo/pbdma_ga10b_fusa.c
index 620a48fba..1ae99bc3b 100644
--- a/drivers/gpu/nvgpu/hal/fifo/pbdma_ga10b_fusa.c
+++ b/drivers/gpu/nvgpu/hal/fifo/pbdma_ga10b_fusa.c
@@ -23,6 +23,7 @@
 #include <nvgpu/log.h>
 #include <nvgpu/log2.h>
 #include <nvgpu/utils.h>
+#include <nvgpu/debug.h>
 #include <nvgpu/io.h>
 #include <nvgpu/bitops.h>
 #include <nvgpu/error_notifier.h>
@@ -435,6 +436,8 @@ static bool ga10b_pbdma_handle_intr_0_legacy(struct gk20a *g, u32 pbdma_id,
 			recover = true;
 			nvgpu_err(g, "semaphore acquire timeout!");
 
+			gk20a_debug_dump(g);
+
 			/*
 			 * Note: the error_notifier can be overwritten if
 			 * semaphore_timeout is triggered with pbcrc_pending
diff --git a/drivers/gpu/nvgpu/hal/fifo/pbdma_gm20b_fusa.c b/drivers/gpu/nvgpu/hal/fifo/pbdma_gm20b_fusa.c
index 901393e94..6d145a035 100644
--- a/drivers/gpu/nvgpu/hal/fifo/pbdma_gm20b_fusa.c
+++ b/drivers/gpu/nvgpu/hal/fifo/pbdma_gm20b_fusa.c
@@ -167,6 +167,8 @@ bool gm20b_pbdma_handle_intr_0(struct gk20a *g, u32 pbdma_id,
 			recover = true;
 			nvgpu_err(g, "semaphore acquire timeout!");
 
+			gk20a_debug_dump(g);
+
 			/*
 			 * Note: the error_notifier can be overwritten if
 			 * semaphore_timeout is triggered with pbcrc_pending