gpu: nvgpu: unit: libnvgpu-fifo for host makefiles

channel and tsg units used to build object files from
upper fifo directory. But this was causing build
dependencies issues and stale .o files could be used.
Fixed this by building a shared library for nvgpu-fifo
for host makefiles.

Jira NVGPU-3480

Change-Id: I32655c207f48baa5cde40846ae5a276c7c8fa6fd
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2150370
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vedashree Vidwans <vvidwans@nvidia.com>
Tested-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-by: Adeel Raza <araza@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

userspace/units/fifo/Makefile

@@ -0,0 +1,27 @@
+# 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.
+
+.SUFFIXES:
+
+OBJS   = nvgpu-fifo.o nvgpu-fifo-gv11b.o
+
+MODULE = nvgpu-fifo
+
+include ../Makefile.units

userspace/units/fifo/channel/Makefile

@@ -20,7 +20,14 @@
 
 .SUFFIXES:
 
-OBJS   = nvgpu-channel.o ../nvgpu-fifo.o ../nvgpu-fifo-gv11b.o
+OBJS   = nvgpu-channel.o
 MODULE = nvgpu-channel
 
+LIB_PATHS += -lnvgpu-fifo
 include ../../Makefile.units
+
+lib$(MODULE).so: fifo
+
+fifo:
+	$(MAKE) -C ..
+

userspace/units/fifo/tsg/Makefile

@@ -20,7 +20,13 @@
 
 .SUFFIXES:
 
-OBJS   = nvgpu-tsg.o ../nvgpu-fifo.o ../nvgpu-fifo-gv11b.o
+OBJS   = nvgpu-tsg.o
 MODULE = nvgpu-tsg
 
+LIB_PATHS += -lnvgpu-fifo
 include ../../Makefile.units
+
+lib$(MODULE).so: fifo
+
+fifo:
+	$(MAKE) -C ..