tegra: hwpm: add hwpm-next, k5.10 support

Kernel 5.10 support
- Use code from HWPM repo with kernel 5.10 builds.
- Add HWPM source files as built-in driver as IP drivers like PVA,
DLA are built-in and dependent on HWPM for IP registration.

HWPM next chips support
- Currently, only HWPM code in the current (public) repo is included in
compilation on TOT. This patch includes Makefile from HWPM next repo for
next/future chips.

Jira THWPM-69

Change-Id: I8f2bbcabf0c01f2b2cbc722c481a1fe83490c76b
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-hwpm/+/2921358
Reviewed-by: Adeel Raza <araza@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/tegra/hwpm/Kconfig

@@ -1,6 +1,6 @@
 config TEGRA_SOC_HWPM
-	tristate "Tegra SOC HWPM driver"
+	bool "Tegra SOC HWPM driver"
-	default m
+	default y
 	help
 	  The SOC HWPM driver enables performance monitoring for various Tegra
 	  IPs.

drivers/tegra/hwpm/Makefile

@@ -6,6 +6,7 @@
 GCOV_PROFILE := y
 
 ifeq ($(origin srctree.hwpm), undefined)
+# Set HWPM source repo path
 srctree.hwpm := $(abspath $(shell dirname $(lastword $(MAKEFILE_LIST))))/../../..
 endif
 
@@ -15,10 +16,10 @@ ccflags-y += -DCONFIG_TEGRA_SOC_HWPM
 CONFIG_TEGRA_T234_HWPM := y
 ccflags-y += -DCONFIG_TEGRA_T234_HWPM
 
-NVHWPM_OBJ = m
-
 # For OOT builds, set required config flags
 ifeq ($(CONFIG_TEGRA_OOT_MODULE),m)
+NVHWPM_OBJ = m
+
 CONFIG_TEGRA_HWPM_OOT := y
 ccflags-y += -DCONFIG_TEGRA_HWPM_OOT
 
@@ -30,7 +31,8 @@ LINUXINCLUDE += -I$(srctree.hwpm)/drivers/tegra/hwpm/include
 LINUXINCLUDE += -I$(srctree.hwpm)/drivers/tegra/hwpm
 
 else
-ccflags-y += -I$(srctree.nvidia)/include
+NVHWPM_OBJ = y
+
 ccflags-y += -I$(srctree.hwpm)/include
 ccflags-y += -I$(srctree.hwpm)/drivers/tegra/hwpm/include
 ccflags-y += -I$(srctree.hwpm)/drivers/tegra/hwpm
@@ -42,7 +44,7 @@ nvhwpm-y := tegra_hwpm_mock.o
 
 else
 # Add required objects to nvhwpm object variable
-include $(srctree.hwpm)/drivers/tegra/hwpm/Makefile.sources
+include $(srctree.hwpm)/drivers/tegra/hwpm/Makefile.hwpm.sources
 
 endif
 

drivers/tegra/hwpm/Makefile.hwpm.sources

@@ -0,0 +1,45 @@
+# Copyright (c) 2023, NVIDIA CORPORATION. All rights reserved.
+#
+# Tegra SOC HWPM Sources
+#
+
+ifeq ($(CONFIG_TEGRA_OOT_MODULE),m)
+
+srctree.hwpm-next := ${srctree.hwpm}
+# Include next sources only if Makefile.hwpm-next.sources exists
+ifneq ($(wildcard ${srctree.hwpm-next}/drivers/tegra/hwpm/Makefile.hwpm-next.sources),)
+include ${srctree.hwpm-next}/drivers/tegra/hwpm/Makefile.hwpm-next.sources
+nvhwpm-objs += ${nvhwpm-next-objs}
+endif
+
+else # Non-OOT kernel
+
+ifeq ($(origin NV_SOURCE), undefined)
+ifeq ($(origin TEGRA_TOP), undefined)
+# No reference to hwpm-next repo
+else
+srctree.hwpm-next := ${TEGRA_TOP}/kernel/hwpm-next
+endif
+else
+srctree.hwpm-next := ${NV_SOURCE}/kernel/hwpm-next
+endif
+ifneq ($(origin srctree.hwpm-next), undefined)
+include ${srctree.hwpm-next}/drivers/tegra/Makefile.hwpm-next.sources
+nvhwpm-objs += ${nvhwpm-next-objs}
+endif
+
+endif
+
+# Include common files
+include ${srctree.hwpm}/drivers/tegra/hwpm/Makefile.common.sources
+nvhwpm-objs += ${nvhwpm-common-objs}
+
+# Include linux files
+include ${srctree.hwpm}/drivers/tegra/hwpm/Makefile.linux.sources
+nvhwpm-objs += ${nvhwpm-linux-objs}
+
+ifeq ($(CONFIG_TEGRA_T234_HWPM),y)
+# Include T234 files
+include ${srctree.hwpm}/drivers/tegra/hwpm/Makefile.t234.sources
+nvhwpm-objs += ${nvhwpm-t234-objs}
+endif

drivers/tegra/hwpm/Makefile.sources

@@ -1,18 +0,0 @@
-# Copyright (c) 2023, NVIDIA CORPORATION. All rights reserved.
-#
-# Tegra SOC HWPM Sources
-#
-
-# Include common files
-include $(srctree.hwpm)/drivers/tegra/hwpm/Makefile.common.sources
-nvhwpm-objs += ${nvhwpm-common-objs}
-
-# Include linux files
-include $(srctree.hwpm)/drivers/tegra/hwpm/Makefile.linux.sources
-nvhwpm-objs += ${nvhwpm-linux-objs}
-
-ifeq ($(CONFIG_TEGRA_T234_HWPM),y)
-# Include T234 files
-include $(srctree.hwpm)/drivers/tegra/hwpm/Makefile.t234.sources
-nvhwpm-objs += ${nvhwpm-t234-objs}
-endif