gpu: nvgpu: use vpr resize enabled API

This patch adds nvgpu API in linux and posix to query vpr resize.
The new API nvgpu_is_vpr_resize_enabled() is used in
nvgpu_submit_channel_gpfifo().
Previously, if non-deterministic channel has timeout disabled and
GPU cannot railgate on some platform, then channel doesn't power ref
count and results in video freeze. To resolve non-determinstic channel
job tracking needs to be enabled if vpr resize is supported or if GPU
can railgate.

Bug 200532122

Change-Id: Icfbff6253762b195b2f5955749343974b1a7a269
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2171093
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

arch/nvgpu-interface.yaml

@@ -126,3 +126,7 @@ os_sched:
 nvhost:
   safe: yes
   sources: [ include/nvgpu/nvhost.h ]
+
+vpr:
+  safe: no
+  sources: [ include/nvgpu/vpr.h ]

arch/nvgpu-linux.yaml

@@ -16,6 +16,9 @@ bsearch:
 channel:
   sources: [ os/linux/linux-channel.c, os/linux/channel.h ]
 
+vpr:
+  sources: [ os/linux/vpr.c ]
+
 clk:
   sources: [ os/linux/clk.c, os/linux/clk.h ]
 

arch/nvgpu-posix.yaml

@@ -33,7 +33,8 @@ all:
              os/posix/posix-vgpu.c,
              os/posix/posix-vidmem.c,
              os/posix/fecs_trace_posix.c,
-             os/posix/stubs.c ]
+             os/posix/stubs.c,
+             os/posix/posix-vpr.c ]
 
 headers:
   safe: no

drivers/gpu/nvgpu/Makefile

@@ -355,7 +355,8 @@ nvgpu-y += \
 	os/linux/os_ops_tu104.o \
 	os/linux/bsearch.o \
 	os/linux/sdl/sdl_stub.o \
-	os/linux/dmabuf_vidmem.o
+	os/linux/dmabuf_vidmem.o \
+	os/linux/vpr.o
 
 nvgpu-$(CONFIG_DEBUG_FS) += \
 	os/linux/debug.o \

drivers/gpu/nvgpu/Makefile.sources

@@ -37,7 +37,8 @@ srcs +=	os/posix/nvgpu.c \
 	os/posix/stubs.c \
 	os/posix/posix-nvhost.c \
 	os/posix/posix-vgpu.c \
-	os/posix/posix-dt.c
+	os/posix/posix-dt.c \
+	os/posix/posix-vpr.c
 
 ifdef CONFIG_NVGPU_FECS_TRACE
 srcs += os/posix/fecs_trace_posix.c

drivers/gpu/nvgpu/common/fifo/submit.c

@@ -30,6 +30,7 @@
 #include <nvgpu/bug.h>
 #include <nvgpu/fence.h>
 #include <nvgpu/profile.h>
+#include <nvgpu/vpr.h>
 
 #ifdef CONFIG_NVGPU_TRACE
 #include <trace/events/gk20a.h>
@@ -405,6 +406,7 @@ static int nvgpu_submit_channel_gpfifo(struct nvgpu_channel *c,
 	 *  - pre- or post-fence functionality
 	 *  - channel wdt
 	 *  - GPU rail-gating with non-deterministic channels
+	 *  - VPR resize enabled with non-deterministic channels
 	 *  - buffer refcounting
 	 *
 	 * If none of the conditions are met, then job tracking is not
@@ -413,8 +415,9 @@ static int nvgpu_submit_channel_gpfifo(struct nvgpu_channel *c,
 	 */
 	need_job_tracking = (flag_fence_wait ||
 			flag_fence_get ||
-			(nvgpu_is_enabled(g, NVGPU_CAN_RAILGATE)
-			 && !c->deterministic) ||
+			((nvgpu_is_enabled(g, NVGPU_CAN_RAILGATE) ||
+				nvgpu_is_vpr_resize_enabled()) &&
+				!c->deterministic) ||
 			!skip_buffer_refcounting);
 
 #ifdef CONFIG_NVGPU_CHANNEL_WDT

drivers/gpu/nvgpu/include/nvgpu/vpr.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NVGPU_VPR_H
+#define NVGPU_VPR_H
+
+#include <nvgpu/types.h>
+
+bool nvgpu_is_vpr_resize_enabled(void);
+
+#endif /* NVGPU_VPR_H */

drivers/gpu/nvgpu/os/linux/vpr.c

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <nvgpu/vpr.h>
+
+#include <linux/init.h>
+#include <linux/platform/tegra/common.h>
+
+bool nvgpu_is_vpr_resize_enabled(void)
+{
+	return tegra_is_vpr_resize_enabled();
+}

drivers/gpu/nvgpu/os/posix/posix-vpr.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2019, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <nvgpu/vpr.h>
+
+bool nvgpu_is_vpr_resize_enabled(void)
+{
+	return false;
+}