[dpdk-dev] [PATCH v2 1/6] eal: eal stub to add windows support

[Anand Rawat <anand.rawat@intel.com>]

Added initial stub source files for windows support and meson
changes to build them.

Signed-off-by: Anand Rawat <anand.rawat@intel.com>
Signed-off-by: Pallavi Kadam <pallavi.kadam@intel.com>
Reviewed-by: Jeff Shaw <jeffrey.b.shaw@intel.com>
Reviewed-by: Ranjit Menon <ranjit.menon@intel.com>
---
 config/meson.build                      | 22 ++++---
 config/x86/meson.build                  | 14 +++--
 lib/librte_eal/common/meson.build       | 84 ++++++++++++++-----------
 lib/librte_eal/meson.build              | 10 ++-
 lib/librte_eal/windows/eal/eal.c        | 11 ++++
 lib/librte_eal/windows/eal/eal_debug.c  | 12 ++++
 lib/librte_eal/windows/eal/eal_lcore.c  | 26 ++++++++
 lib/librte_eal/windows/eal/eal_thread.c | 15 +++++
 lib/librte_eal/windows/eal/meson.build  | 10 +++
 lib/meson.build                         |  6 +-
 meson.build                             | 34 +++++-----
 11 files changed, 176 insertions(+), 68 deletions(-)
 create mode 100644 lib/librte_eal/windows/eal/eal.c
 create mode 100644 lib/librte_eal/windows/eal/eal_debug.c
 create mode 100644 lib/librte_eal/windows/eal/eal_lcore.c
 create mode 100644 lib/librte_eal/windows/eal/eal_thread.c
 create mode 100644 lib/librte_eal/windows/eal/meson.build

diff --git a/config/meson.build b/config/meson.build
index 0419607d3..37adf5b03 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # set the machine type and cflags for it
 if meson.is_cross_build()
@@ -52,18 +52,26 @@ dpdk_extra_ldflags += '-Wl,--no-as-needed'
 add_project_link_arguments('-pthread', language: 'c')
 dpdk_extra_ldflags += '-pthread'
 
-# some libs depend on maths lib
-add_project_link_arguments('-lm', language: 'c')
-dpdk_extra_ldflags += '-lm'
+if cc.find_library('lm', required : false).found()
+	# some libs depend on maths lib
+	add_project_link_arguments('-lm', language: 'c')
+	dpdk_extra_ldflags += '-lm'
+endif
 
 # for linux link against dl, for bsd execinfo
 if host_machine.system() == 'linux'
 	link_lib = 'dl'
-else
+elif host_machine.system() == 'freebsd'
 	link_lib = 'execinfo'
+else
+	link_lib = ''
+endif
+
+# if link_lib is empty, do not add it to project properties
+if link_lib != ''
+	add_project_link_arguments('-l' + link_lib, language: 'c')
+	dpdk_extra_ldflags += '-l' + link_lib
 endif
-add_project_link_arguments('-l' + link_lib, language: 'c')
-dpdk_extra_ldflags += '-l' + link_lib
 
 # check for libraries used in multiple places in DPDK
 has_libnuma = 0
diff --git a/config/x86/meson.build b/config/x86/meson.build
index 7504cb9e5..558edfda9 100644
--- a/config/x86/meson.build
+++ b/config/x86/meson.build
@@ -1,15 +1,17 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # for checking defines we need to use the correct compiler flags
 march_opt = ['-march=@0@'.format(machine)]
 
 # get binutils version for the workaround of Bug 97
-ldver = run_command('ld', '-v').stdout().strip()
-if ldver.contains('2.30')
-	if cc.has_argument('-mno-avx512f')
-		march_opt += '-mno-avx512f'
-		message('Binutils 2.30 detected, disabling AVX512 support as workaround for bug #97')
+if host_machine.system() != 'windows'
+	ldver = run_command('ld', '-v').stdout().strip()
+	if ldver.contains('2.30')
+		if cc.has_argument('-mno-avx512f')
+			march_opt += '-mno-avx512f'
+			message('Binutils 2.30 detected, disabling AVX512 support as workaround for bug #97')
+		endif
 	endif
 endif
 
diff --git a/lib/librte_eal/common/meson.build b/lib/librte_eal/common/meson.build
index 5ecae0b1f..c010e8737 100644
--- a/lib/librte_eal/common/meson.build
+++ b/lib/librte_eal/common/meson.build
@@ -1,58 +1,65 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 eal_inc += include_directories('.', 'include',
 		join_paths('include/arch', arch_subdir))
 
 common_objs = []
-common_sources = files(
-	'eal_common_bus.c',
-	'eal_common_cpuflags.c',
-	'eal_common_class.c',
-	'eal_common_devargs.c',
-	'eal_common_dev.c',
-	'eal_common_errno.c',
-	'eal_common_fbarray.c',
-	'eal_common_hexdump.c',
-	'eal_common_hypervisor.c',
-	'eal_common_launch.c',
-	'eal_common_lcore.c',
-	'eal_common_log.c',
-	'eal_common_memalloc.c',
-	'eal_common_memory.c',
-	'eal_common_memzone.c',
-	'eal_common_options.c',
-	'eal_common_proc.c',
-	'eal_common_string_fns.c',
-	'eal_common_tailqs.c',
-	'eal_common_thread.c',
-	'eal_common_timer.c',
-	'eal_common_uuid.c',
-	'hotplug_mp.c',
-	'malloc_elem.c',
-	'malloc_heap.c',
-	'malloc_mp.c',
-	'rte_keepalive.c',
-	'rte_malloc.c',
-	'rte_option.c',
-	'rte_reciprocal.c',
-	'rte_service.c'
-)
+common_sources = []
+common_headers = []
+if host_machine.system() != 'windows'
+	common_sources = files(
+		'eal_common_bus.c',
+		'eal_common_cpuflags.c',
+		'eal_common_class.c',
+		'eal_common_devargs.c',
+		'eal_common_dev.c',
+		'eal_common_errno.c',
+		'eal_common_fbarray.c',
+		'eal_common_hexdump.c',
+		'eal_common_hypervisor.c',
+		'eal_common_launch.c',
+		'eal_common_lcore.c',
+		'eal_common_log.c',
+		'eal_common_memalloc.c',
+		'eal_common_memory.c',
+		'eal_common_memzone.c',
+		'eal_common_options.c',
+		'eal_common_proc.c',
+		'eal_common_string_fns.c',
+		'eal_common_tailqs.c',
+		'eal_common_thread.c',
+		'eal_common_timer.c',
+		'eal_common_uuid.c',
+		'hotplug_mp.c',
+		'malloc_elem.c',
+		'malloc_heap.c',
+		'malloc_mp.c',
+		'rte_keepalive.c',
+		'rte_malloc.c',
+		'rte_option.c',
+		'rte_reciprocal.c',
+		'rte_service.c'
+	)
+endif
 
 # get architecture specific sources and objs
 eal_common_arch_sources = []
 eal_common_arch_objs = []
-subdir(join_paths('arch', arch_subdir))
+
+common_headers += files('include/rte_common.h')
+if host_machine.system() != 'windows'
+	subdir(join_paths('arch', arch_subdir))
+endif
 common_sources += eal_common_arch_sources
 common_objs += eal_common_arch_objs
 
-common_headers = files(
+common_headers += files(
 	'include/rte_alarm.h',
 	'include/rte_branch_prediction.h',
 	'include/rte_bus.h',
 	'include/rte_bitmap.h',
 	'include/rte_class.h',
-	'include/rte_common.h',
 	'include/rte_compat.h',
 	'include/rte_debug.h',
 	'include/rte_devargs.h',
@@ -85,7 +92,8 @@ common_headers = files(
 	'include/rte_tailq.h',
 	'include/rte_time.h',
 	'include/rte_uuid.h',
-	'include/rte_version.h')
+	'include/rte_version.h'
+)
 
 # special case install the generic headers, since they go in a subdir
 generic_headers = files(
diff --git a/lib/librte_eal/meson.build b/lib/librte_eal/meson.build
index 98c1d1f31..61b654557 100644
--- a/lib/librte_eal/meson.build
+++ b/lib/librte_eal/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 # Custom EAL processing. EAL is complicated enough that it can't just
 # have a straight list of headers and source files.
@@ -17,13 +17,19 @@ elif host_machine.system() == 'freebsd'
 	dpdk_conf.set('RTE_EXEC_ENV_BSDAPP', 1)
 	subdir('bsdapp/eal')
 
+elif host_machine.system() == 'windows'
+	dpdk_conf.set('RTE_EXEC_ENV_WINDOWS', 1)
+	subdir('windows/eal')
+
 else
 	error('unsupported system type "@0@"'.format(host_machine.system()))
 endif
 
 version = 9  # the version of the EAL API
 allow_experimental_apis = true
-deps += 'kvargs'
+if host_machine.system() != 'windows'
+	deps += 'kvargs'
+endif
 if dpdk_conf.has('RTE_USE_LIBBSD')
 	ext_deps += libbsd
 endif
diff --git a/lib/librte_eal/windows/eal/eal.c b/lib/librte_eal/windows/eal/eal.c
new file mode 100644
index 000000000..134452a77
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal.c
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include "rte_common.h"
+
+int
+rte_eal_init(int argc __rte_unused, char **argv __rte_unused)
+{
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/eal_debug.c b/lib/librte_eal/windows/eal/eal_debug.c
new file mode 100644
index 000000000..012eeccfa
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_debug.c
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include "rte_common.h"
+
+void
+__rte_panic(const char *funcname __rte_unused,
+		const char *format __rte_unused, ...)
+{
+	abort();
+}
diff --git a/lib/librte_eal/windows/eal/eal_lcore.c b/lib/librte_eal/windows/eal/eal_lcore.c
new file mode 100644
index 000000000..be7adeb18
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_lcore.c
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2019 Intel Corporation
+ */
+
+#include "rte_common.h"
+
+ /* Get the cpu core id value */
+unsigned int
+eal_cpu_core_id(unsigned int lcore_id)
+{
+	return lcore_id;
+}
+
+/* Check if a cpu is present by the presence of the cpu information for it */
+int
+eal_cpu_detected(unsigned int lcore_id __rte_unused)
+{
+	return 1;
+}
+
+/* Get CPU socket id (NUMA node) for a logical core */
+unsigned int
+eal_cpu_socket_id(unsigned int cpu_id __rte_unused)
+{
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/eal_thread.c b/lib/librte_eal/windows/eal/eal_thread.c
new file mode 100644
index 000000000..222bd8f4d
--- /dev/null
+++ b/lib/librte_eal/windows/eal/eal_thread.c
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2018 Intel Corporation
+ */
+
+#include <windows.h>
+
+#include "rte_common.h"
+
+typedef uintptr_t eal_thread_t;
+
+int
+eal_thread_create(eal_thread_t *thread __rte_unused)
+{
+	return 0;
+}
diff --git a/lib/librte_eal/windows/eal/meson.build b/lib/librte_eal/windows/eal/meson.build
new file mode 100644
index 000000000..8b1735623
--- /dev/null
+++ b/lib/librte_eal/windows/eal/meson.build
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2019 Intel Corporation
+
+env_objs = []
+env_headers = []
+env_sources = files('eal.c',
+	'eal_debug.c',
+	'eal_lcore.c',
+	'eal_thread.c',
+)
diff --git a/lib/meson.build b/lib/meson.build
index 99957ba7d..995c0e1ac 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 
 # process all libraries equally, as far as possible
@@ -30,6 +30,10 @@ libraries = [
 	# flow_classify lib depends on pkt framework table lib
 	'flow_classify', 'bpf', 'telemetry']
 
+if host_machine.system() == 'windows'
+	libraries = ['eal'] # override libraries for windows
+endif
+
 default_cflags = machine_args
 if cc.has_argument('-Wno-format-truncation')
 	default_cflags += '-Wno-format-truncation'
diff --git a/meson.build b/meson.build
index 69833de82..856e94c37 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017 Intel Corporation
+# Copyright(c) 2017-2019 Intel Corporation
 
 project('DPDK', 'C',
 	version: '19.05.0-rc0',
@@ -13,6 +13,7 @@ cc = meson.get_compiler('c')
 dpdk_conf = configuration_data()
 dpdk_libraries = []
 dpdk_static_libraries = []
+driver_classes = []
 dpdk_drivers = []
 dpdk_extra_ldflags = []
 dpdk_app_link_libraries = []
@@ -35,28 +36,33 @@ eal_pmd_path = join_paths(get_option('prefix'), driver_install_path)
 global_inc = include_directories('.', 'config', 'lib/librte_eal/common/include')
 subdir('config')
 
-# build libs and drivers
+# build libs
 subdir('lib')
-subdir('buildtools')
-subdir('drivers')
 
-# build binaries and installable tools
-subdir('usertools')
-subdir('app')
+if host_machine.system() != 'windows'
+	# build buildtools and drivers
+	subdir('buildtools')
+	subdir('drivers')
 
-# build docs
-subdir('doc')
+	# build binaries and installable tools
+	subdir('usertools')
+	subdir('app')
+	subdir('test')
+
+	# build kernel modules if enabled
+	if get_option('enable_kmods')
+		subdir('kernel')
+	endif
+
+	# build docs
+	subdir('doc')
+endif
 
 # build any examples explicitly requested - useful for developers
 if get_option('examples') != ''
 	subdir('examples')
 endif
 
-# build kernel modules if enabled
-if get_option('enable_kmods')
-	subdir('kernel')
-endif
-
 # write the build config
 build_cfg = 'rte_build_config.h'
 configure_file(output: build_cfg,
-- 
2.17.1.windows.2