[dpdk-dev] [RFC PATCH v2 4/8] qat: build from common folder

[Bruce Richardson <bruce.richardson@intel.com>]

Since the drivers in the common directory can be processed out of order, in
this case following the "bus" directory, we can simplify somewhat the build
of the QAT driver to be done entirely from the "common/qat" folder rather
than having it's build distributed across 3 folders.

This also opens up the possibility of building the QAT driver with crypto
only and the compression part disabled. It further allows more sensible
naming of the resulting shared library in case of standardizing library
names based on device class; i.e. common_qat is more descriptive for a
combined crypto/compression driver than either of the other two prefixes
individually.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 drivers/common/meson.build                    |  2 +-
 drivers/common/qat/meson.build                | 69 ++++++++++++++++---
 .../qat/rte_common_qat_version.map}           |  0
 drivers/compress/meson.build                  |  2 +-
 drivers/compress/qat/meson.build              | 17 -----
 drivers/crypto/meson.build                    |  1 -
 drivers/crypto/qat/meson.build                | 23 -------
 drivers/meson.build                           |  1 +
 8 files changed, 63 insertions(+), 52 deletions(-)
 rename drivers/{compress/qat/rte_pmd_qat_version.map => common/qat/rte_common_qat_version.map} (100%)
 delete mode 100644 drivers/compress/qat/meson.build
 delete mode 100644 drivers/crypto/qat/meson.build

diff --git a/drivers/common/meson.build b/drivers/common/meson.build
index 7ac1ca73a2..abb4f1529a 100644
--- a/drivers/common/meson.build
+++ b/drivers/common/meson.build
@@ -6,6 +6,6 @@ if is_windows
 endif
 
 std_deps = ['eal']
-drivers = ['cpt', 'dpaax', 'iavf', 'mvep', 'octeontx', 'octeontx2', 'qat', 'sfc_efx']
+drivers = ['cpt', 'dpaax', 'iavf', 'mvep', 'octeontx', 'octeontx2', 'sfc_efx']
 config_flag_fmt = 'RTE_LIBRTE_@0@_COMMON'
 driver_name_fmt = 'rte_common_@0@'
diff --git a/drivers/common/qat/meson.build b/drivers/common/qat/meson.build
index 8de2492893..3409162d03 100644
--- a/drivers/common/qat/meson.build
+++ b/drivers/common/qat/meson.build
@@ -1,15 +1,66 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017-2018 Intel Corporation
 
-# This does not build a driver, but instead holds common files for
-# the crypto and compression drivers.
-build = false
-reason = '' # sentinal value to suppress printout
-qat_deps = ['bus_pci']
-qat_sources = files('qat_common.c',
+config_flag_fmt = 'RTE_LIBRTE_@0@_COMMON'
+driver_name_fmt = 'rte_common_@0@'
+
+qat_crypto = true
+qat_crypto_path = 'crypto/qat'
+qat_crypto_relpath = '../../' + qat_crypto_path
+qat_compress = true
+qat_compress_path = 'compress/qat'
+qat_compress_relpath = '../../' + qat_compress_path
+
+if disabled_drivers.contains(qat_crypto_path)
+	qat_crypto = false
+	dpdk_drvs_disabled += qat_crypto_path
+	set_variable(qat_crypto_path.underscorify() + '_disable_reason',
+			'Explicitly disabled via build config')
+endif
+if disabled_drivers.contains(qat_compress_path)
+	qat_compress = false
+	dpdk_drvs_disabled += qat_compress_path
+	set_variable(qat_compress_path.underscorify() + '_disable_reason',
+			'Explicitly disabled via build config')
+endif
+
+libcrypto = dependency('libcrypto', required: false)
+if qat_crypto and not libcrypto.found()
+	qat_crypto = false
+	dpdk_drvs_disabled += qat_crypto_path
+	set_variable(qat_crypto_path.underscorify() + '_disable_reason',
+			'missing dependency, libcrypto')
+endif
+
+# The driver should not build if both compression and crypto are disabled
+#FIXME common code depends on compression files so check only compress!
+if not qat_compress # and not qat_crypto
+	build = false
+	reason = '' # rely on reason for compress/crypto above
+	subdir_done()
+endif
+
+deps += ['bus_pci', 'cryptodev', 'net', 'compressdev']
+sources += files('qat_common.c',
 		'qat_qp.c',
 		'qat_device.c',
 		'qat_logs.c')
-qat_includes = [include_directories('.', 'qat_adf')]
-qat_ext_deps = []
-qat_cflags = []
+includes += include_directories('qat_adf',
+		qat_crypto_relpath,
+		qat_compress_relpath)
+
+if qat_compress
+	foreach f: ['qat_comp_pmd.c', 'qat_comp.c']
+		sources += files(join_paths(qat_compress_relpath, f))
+	endforeach
+endif
+
+if qat_crypto
+	foreach f: ['qat_sym_pmd.c', 'qat_sym.c', 'qat_sym_session.c',
+			'qat_asym_pmd.c', 'qat_asym.c']
+		sources += files(join_paths(qat_crypto_relpath, f))
+	endforeach
+	deps += ['security']
+	ext_deps += libcrypto
+	cflags += ['-DBUILD_QAT_SYM', '-DBUILD_QAT_ASYM']
+endif
diff --git a/drivers/compress/qat/rte_pmd_qat_version.map b/drivers/common/qat/rte_common_qat_version.map
similarity index 100%
rename from drivers/compress/qat/rte_pmd_qat_version.map
rename to drivers/common/qat/rte_common_qat_version.map
diff --git a/drivers/compress/meson.build b/drivers/compress/meson.build
index bea1720a0b..3a4723c0ce 100644
--- a/drivers/compress/meson.build
+++ b/drivers/compress/meson.build
@@ -5,7 +5,7 @@ if is_windows
 	subdir_done()
 endif
 
-drivers = ['isal', 'octeontx', 'qat', 'zlib']
+drivers = ['isal', 'octeontx', 'zlib']
 
 std_deps = ['compressdev'] # compressdev pulls in all other needed deps
 config_flag_fmt = 'RTE_LIBRTE_PMD_@0@'
diff --git a/drivers/compress/qat/meson.build b/drivers/compress/qat/meson.build
deleted file mode 100644
index a002469809..0000000000
--- a/drivers/compress/qat/meson.build
+++ /dev/null
@@ -1,17 +0,0 @@
-# SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017-2018 Intel Corporation
-
-
-# Add our sources files to the list
-qat_sources += files('qat_comp_pmd.c',
-		     'qat_comp.c')
-qat_includes += include_directories('.')
-qat_deps += 'compressdev'
-qat_ext_deps += dep
-
-# build the whole driver
-sources += qat_sources
-cflags += qat_cflags
-deps += qat_deps
-ext_deps += qat_ext_deps
-includes += qat_includes
diff --git a/drivers/crypto/meson.build b/drivers/crypto/meson.build
index 25b99c19cb..bd7a940e6d 100644
--- a/drivers/crypto/meson.build
+++ b/drivers/crypto/meson.build
@@ -19,7 +19,6 @@ drivers = ['aesni_gcm',
 	   'octeontx',
 	   'octeontx2',
 	   'openssl',
-	   'qat',
 	   'scheduler',
 	   'snow3g',
 	   'virtio',
diff --git a/drivers/crypto/qat/meson.build b/drivers/crypto/qat/meson.build
deleted file mode 100644
index a225f374a6..0000000000
--- a/drivers/crypto/qat/meson.build
+++ /dev/null
@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: BSD-3-Clause
-# Copyright(c) 2017-2018 Intel Corporation
-
-# this does not build the QAT driver, instead that is done in the compression
-# driver which comes later. Here we just add our sources files to the list
-build = false
-reason = '' # sentinal value to suppress printout
-dep = dependency('libcrypto', required: false)
-qat_includes += include_directories('.')
-qat_deps += 'cryptodev'
-qat_deps += 'net'
-qat_deps += 'security'
-if dep.found()
-	# Add our sources files to the list
-	qat_sources += files('qat_sym_pmd.c',
-			     'qat_sym.c',
-			     'qat_sym_session.c',
-			     'qat_asym_pmd.c',
-			     'qat_asym.c')
-	qat_ext_deps += dep
-	qat_cflags += '-DBUILD_QAT_SYM'
-	qat_cflags += '-DBUILD_QAT_ASYM'
-endif
diff --git a/drivers/meson.build b/drivers/meson.build
index b5ac483d31..b95b005839 100644
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -6,6 +6,7 @@ subdirs = [
 	'common',
 	'bus',
 	'common/mlx5', # depends on bus.
+	'common/qat', # depends on bus.
 	'mempool', # depends on common and bus.
 	'net',     # depends on common, bus, mempool
 	'raw',     # depends on common, bus and net.
-- 
2.25.1