[PATCH 131/459] drm/amdkfd: Parameterize queue_preemption_timeout_ms

[Alex Deucher]

From: Oak Zeng <Oak.Zeng at amd.com>

Added a module parameter queue_preemption_timeout_ms. This is helpful
for debugging kfd on emulator environment which is much slower than
a real chip so the fence wait timeout value should be much bigger.

Signed-off-by: Oak Zeng <Oak.Zeng at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c               | 8 ++++++++
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h | 2 --
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h                 | 7 +++++++
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 9646de2daa02..4a0000aa2144 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -693,6 +693,14 @@ MODULE_PARM_DESC(halt_if_hws_hang, "Halt if HWS hang is detected (0 = off (defau
 bool hws_gws_support;
 module_param(hws_gws_support, bool, 0444);
 MODULE_PARM_DESC(hws_gws_support, "MEC FW support gws barriers (false = not supported (Default), true = supported)");
+
+/**
+  * DOC: queue_preemption_timeout_ms (int)
+  * queue preemption timeout in ms (1 = Minimum, 9000 = default)
+  */
+int queue_preemption_timeout_ms;
+module_param(queue_preemption_timeout_ms, int, 0644);
+MODULE_PARM_DESC(queue_preemption_timeout_ms, "queue preemption timeout in ms (1 = Minimum, 9000 = default)");
 #endif
 
 /**
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 632e510b5396..e71978b06fe7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -1302,7 +1302,7 @@ static int unmap_queues_cpsch(struct device_queue_manager *dqm,
 				KFD_FENCE_COMPLETED);
 	/* should be timed out */
 	retval = amdkfd_fence_wait_timeout(dqm->fence_addr, KFD_FENCE_COMPLETED,
-				QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS);
+				queue_preemption_timeout_ms);
 	if (retval)
 		return retval;
 
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
index ff9cdc584120..90db2c9275f6 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
@@ -31,8 +31,6 @@
 #include "kfd_priv.h"
 #include "kfd_mqd_manager.h"
 
-#define KFD_UNMAP_LATENCY_MS			(4000)
-#define QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS (2 * KFD_UNMAP_LATENCY_MS + 1000)
 
 struct device_process_node {
 	struct qcm_process_device *qpd;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 40e40d1e4dd2..a4b81db19082 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -104,6 +104,8 @@
 
 #define KFD_KERNEL_QUEUE_SIZE 2048
 
+#define KFD_UNMAP_LATENCY_MS	(4000)
+
 /*
  * 512 = 0x200
  * The doorbell index distance between SDMA RLC (2*i) and (2*i+1) in the
@@ -166,6 +168,11 @@ extern int halt_if_hws_hang;
  */
 extern bool hws_gws_support;
 
+/*
+ * Queue preemption timeout in ms
+ */
+extern int queue_preemption_timeout_ms;
+
 enum cache_policy {
 	cache_policy_coherent,
 	cache_policy_noncoherent
-- 
2.20.1