msm: kgsl: Allow draw context to perform only replay on recoveryandroid-o-preview-2_r0.3

Robust context attempts to perform a rendering that takes too long
whether due to an infinite loop in a shader or even just a rendering
operation that takes too long on the given hardware. This type of
attempts can result into GPU faults. Robust context expect driver
to replay IB instead skip IB and if it fails on replay context has
to be invalidated.

KGSL_CONTEXT_INVALIDATE_ON_FAULT flag allows draw context to execute
only replay policy on GPU fault recovery instead of going to default
recovery policy. User space has to set this flag during the context
creation.

Bug: 34887800
Change-Id: If42dc5afc7d5ed1226b73ae5abfa2648d7acf2c3
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>

4 files changed, 14 insertions, 3 deletions

diff --git a/drivers/gpu/msm/adreno_dispatch.c b/drivers/gpu/msm/adreno_dispatch.c
index f5fb59acf282..f5840ffb268d 100644
--- a/drivers/gpu/msm/adreno_dispatch.c
+++ b/drivers/gpu/msm/adreno_dispatch.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2013-2015,2017 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -1024,6 +1024,13 @@ int adreno_dispatcher_queue_cmd(struct adreno_device *adreno_dev,
 
 	if (drawctxt->base.flags & KGSL_CONTEXT_NO_FAULT_TOLERANCE)
 		set_bit(KGSL_FT_DISABLE, &cmdbatch->fault_policy);
+	/*
+	 *  Set the fault tolerance policy to FT_REPLAY - As context wants
+	 *  to invalidate it after a replay attempt fails. This doesn't
+	 *  require to execute the default FT policy.
+	 */
+	else if (drawctxt->base.flags & KGSL_CONTEXT_INVALIDATE_ON_FAULT)
+		set_bit(KGSL_FT_REPLAY, &cmdbatch->fault_policy);
 	else
 		cmdbatch->fault_policy = adreno_dev->ft_policy;
 
diff --git a/drivers/gpu/msm/adreno_drawctxt.c b/drivers/gpu/msm/adreno_drawctxt.c
index f1b723102363..a9107c8036a2 100644
--- a/drivers/gpu/msm/adreno_drawctxt.c
+++ b/drivers/gpu/msm/adreno_drawctxt.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2002,2007-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2002,2007-2015,2017 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -333,6 +333,7 @@ adreno_drawctxt_create(struct kgsl_device_private *dev_priv,
 		KGSL_CONTEXT_PER_CONTEXT_TS |
 		KGSL_CONTEXT_USER_GENERATED_TS |
 		KGSL_CONTEXT_NO_FAULT_TOLERANCE |
+		KGSL_CONTEXT_INVALIDATE_ON_FAULT |
 		KGSL_CONTEXT_CTX_SWITCH |
 		KGSL_CONTEXT_PRIORITY_MASK |
 		KGSL_CONTEXT_TYPE_MASK |
diff --git a/drivers/gpu/msm/kgsl_device.h b/drivers/gpu/msm/kgsl_device.h
index ab03192f94e8..424998a4bfe2 100644
--- a/drivers/gpu/msm/kgsl_device.h
+++ b/drivers/gpu/msm/kgsl_device.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2002,2007-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2002,2007-2015,2017 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -87,6 +87,7 @@ enum kgsl_event_results {
 	{ KGSL_CONTEXT_PER_CONTEXT_TS, "PER_CONTEXT_TS" }, \
 	{ KGSL_CONTEXT_USER_GENERATED_TS, "USER_TS" }, \
 	{ KGSL_CONTEXT_NO_FAULT_TOLERANCE, "NO_FT" }, \
+	{ KGSL_CONTEXT_INVALIDATE_ON_FAULT, "INVALIDATE_ON_FAULT" }, \
 	{ KGSL_CONTEXT_PWR_CONSTRAINT, "PWR" }, \
 	{ KGSL_CONTEXT_SAVE_GMEM, "SAVE_GMEM" }
 
diff --git a/include/uapi/linux/msm_kgsl.h b/include/uapi/linux/msm_kgsl.h
index 9bcdaf759fa2..412b17348418 100644
--- a/include/uapi/linux/msm_kgsl.h
+++ b/include/uapi/linux/msm_kgsl.h
@@ -57,6 +57,8 @@
 #define KGSL_CONTEXT_TYPE_RS		4
 #define KGSL_CONTEXT_TYPE_UNKNOWN	0x1E
 
+#define KGSL_CONTEXT_INVALIDATE_ON_FAULT 0x10000000
+
 #define KGSL_CONTEXT_INVALID 0xffffffff
 
 /*