# SPDX-License-Identifier: GPL-2.0
#
# (C) COPYRIGHT 2010-2021 ARM Limited. All rights reserved.
#
# This program is free software and is provided to you under the terms of the
# GNU General Public License version 2 as published by the Free Software
# Foundation, and any use by you of this program is subject to the terms
# of such GNU license.
#
# This program is distributed in the hope that 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, you can access it online at
# http://www.gnu.org/licenses/gpl-2.0.html.
#
#

KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build
KDIR ?= $(KERNEL_SRC)

ifeq ($(KDIR),)
    $(error Must specify KDIR to point to the kernel to target))
endif

#
# Default configuration values
#
# Dependency resolution is done through statements as Kconfig
# is not supported for out-of-tree builds.
#

CONFIG_MALI_MIDGARD ?= m
ifeq ($(CONFIG_MALI_MIDGARD),m)
    CONFIG_MALI_GATOR_SUPPORT ?= y
    CONFIG_MALI_ARBITRATION ?= n

    ifneq ($(CONFIG_MALI_NO_MALI),y)
        # Prevent misuse when CONFIG_MALI_NO_MALI=y
        CONFIG_MALI_REAL_HW ?= y
    endif

    ifeq ($(CONFIG_MALI_MIDGARD_DVFS),y)
        # Prevent misuse when CONFIG_MALI_MIDGARD_DVFS=y
        CONFIG_MALI_DEVFREQ ?= n
    else
        CONFIG_MALI_DEVFREQ ?= y
    endif

    ifeq ($(CONFIG_MALI_DMA_BUF_MAP_ON_DEMAND), y)
        # Prevent misuse when CONFIG_MALI_DMA_BUF_MAP_ON_DEMAND=y
        CONFIG_MALI_DMA_BUF_LEGACY_COMPAT = n
    endif

    #
    # Expert/Debug/Test released configurations
    #
    ifeq ($(CONFIG_MALI_EXPERT), y)
        ifeq ($(CONFIG_MALI_NO_MALI), y)
            CONFIG_MALI_REAL_HW = n
        else
            # Prevent misuse when CONFIG_MALI_NO_MALI=n
            CONFIG_MALI_REAL_HW = y
            CONFIG_MALI_ERROR_INJECT = n
        endif

        ifeq ($(CONFIG_MALI_HW_ERRATA_1485982_NOT_AFFECTED), y)
            # Prevent misuse when CONFIG_MALI_HW_ERRATA_1485982_NOT_AFFECTED=y
            CONFIG_MALI_HW_ERRATA_1485982_USE_CLOCK_ALTERNATIVE = n
        endif

        ifeq ($(CONFIG_MALI_DEBUG), y)
            CONFIG_MALI_MIDGARD_ENABLE_TRACE ?= y
            CONFIG_MALI_SYSTEM_TRACE ?= y
            CONFIG_MALI_FENCE_DEBUG ?= y
        else
            # Prevent misuse when CONFIG_MALI_DEBUG=n
            CONFIG_MALI_MIDGARD_ENABLE_TRACE = n
            CONFIG_MALI_SYSTEM_TRACE = n
            CONFIG_MALI_FENCE_DEBUG = n
        endif
    else
        # Prevent misuse when CONFIG_MALI_EXPERT=n
        CONFIG_MALI_CORESTACK = n
        CONFIG_MALI_2MB_ALLOC = n
        CONFIG_MALI_PWRSOFT_765 = n
        CONFIG_MALI_MEMORY_FULLY_BACKED = n
        CONFIG_MALI_JOB_DUMP = n
        CONFIG_MALI_NO_MALI = n
        CONFIG_MALI_REAL_HW = y
        CONFIG_MALI_ERROR_INJECT = n
        CONFIG_MALI_HW_ERRATA_1485982_NOT_AFFECTED = n
        CONFIG_MALI_HW_ERRATA_1485982_USE_CLOCK_ALTERNATIVE = n
        CONFIG_MALI_PRFCNT_SET_SELECT_VIA_DEBUG_FS = n
        CONFIG_MALI_DEBUG = n
        CONFIG_MALI_MIDGARD_ENABLE_TRACE = n
        CONFIG_MALI_SYSTEM_TRACE = n
        CONFIG_MALI_FENCE_DEBUG = n
    endif

    CONFIG_MALI_KUTF ?= y
    ifeq ($(CONFIG_MALI_KUTF), y)
        ifeq ($(CONFIG_MALI_DEBUG), y)
            CONFIG_MALI_IRQ_LATENCY ?= y
            CONFIG_MALI_CLK_RATE_TRACE_PORTAL ?= y
        else
            # Prevent misuse when CONFIG_MALI_DEBUG=n
            CONFIG_MALI_IRQ_LATENCY = n
            CONFIG_MALI_CLK_RATE_TRACE_PORTAL = n
        endif
    else
        # Prevent misuse when CONFIG_MALI_KUTF=n
        CONFIG_MALI_IRQ_LATENCY = n
        CONFIG_MALI_CLK_RATE_TRACE_PORTAL = n
    endif
else
    # Prevent misuse when CONFIG_MALI_MIDGARD=n
    CONFIG_MALI_ARBITRATION = n
    CONFIG_MALI_KUTF = n
    CONFIG_MALI_IRQ_LATENCY = n
    CONFIG_MALI_CLK_RATE_TRACE_PORTAL = n
endif

# All Mali CONFIG should be listed here
CONFIGS := \
    CONFIG_MALI_MIDGARD \
    CONFIG_MALI_CSF_SUPPORT \
    CONFIG_MALI_GATOR_SUPPORT \
    CONFIG_MALI_DMA_FENCE \
    CONFIG_MALI_ARBITER_SUPPORT \
    CONFIG_MALI_ARBITRATION \
    CONFIG_MALI_PARTITION_MANAGER \
    CONFIG_MALI_REAL_HW \
    CONFIG_MALI_GEM5_BUILD \
    CONFIG_MALI_DEVFREQ \
    CONFIG_MALI_MIDGARD_DVFS \
    CONFIG_MALI_DMA_BUF_MAP_ON_DEMAND \
    CONFIG_MALI_DMA_BUF_LEGACY_COMPAT \
    CONFIG_MALI_EXPERT \
    CONFIG_MALI_CORESTACK \
    CONFIG_MALI_2MB_ALLOC \
    CONFIG_MALI_PWRSOFT_765 \
    CONFIG_MALI_MEMORY_FULLY_BACKED \
    CONFIG_MALI_JOB_DUMP \
    CONFIG_MALI_NO_MALI \
    CONFIG_MALI_ERROR_INJECT \
    CONFIG_MALI_HW_ERRATA_1485982_NOT_AFFECTED \
    CONFIG_MALI_HW_ERRATA_1485982_USE_CLOCK_ALTERNATIVE \
    CONFIG_MALI_PRFCNT_SET_PRIMARY \
    CONFIG_MALI_PRFCNT_SET_SECONDARY \
    CONFIG_MALI_PRFCNT_SET_TERTIARY \
    CONFIG_MALI_PRFCNT_SET_SELECT_VIA_DEBUG_FS \
    CONFIG_MALI_DEBUG \
    CONFIG_MALI_MIDGARD_ENABLE_TRACE \
    CONFIG_MALI_SYSTEM_TRACE \
    CONFIG_MALI_FENCE_DEBUG \
    CONFIG_MALI_KUTF \
    CONFIG_MALI_IRQ_LATENCY \
    CONFIG_MALI_CLK_RATE_TRACE_PORTAL


# Find which config options were enabled. $(value config) is the name of the
# config option (CONFIG_MALI_...), $(value $(value config)) is its value (y, m,
# or n).
ENABLED_CONFIGS := $(foreach config,$(CONFIGS),$(if $(filter y m,$(value $(value config))),$(config)))

# For each enabled option, generate a command line argument e.g.
# CONFIG_MALI_MIDGARD=m.
MAKE_ARGS := $(foreach config,$(ENABLED_CONFIGS),$(value config)=$(value $(value config)))
# For each enabled option, generate a compiler '-DCONFIG_...=$(CONFIG_...)' flag.
EXTRA_CFLAGS := $(foreach config,$(ENABLED_CONFIGS),-D$(value config)=$(value config))

#
# KBUILD_EXTRA_SYMBOLS to prevent warnings about unknown functions
#

all:
	$(MAKE) -C $(KDIR) M=$(CURDIR) $(MAKE_ARGS) EXTRA_CFLAGS="$(EXTRA_CFLAGS)" KBUILD_EXTRA_SYMBOLS="$(EXTRA_SYMBOLS)" modules

modules_install:
	$(MAKE) -C $(KDIR) M=$(CURDIR) $(MAKE_ARGS) modules_install

clean:
	$(MAKE) -C $(KDIR) M=$(CURDIR) $(MAKE_ARGS) clean
