bus/pci: introduce Windows support with stubs

Addition of stub eal and bus/pci functions to compile
bus/pci for Windows.

Signed-off-by: Tal Shnaiderman <talshn@mellanox.com>

drivers/baseband/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Luca Boccassi <bluca@debian.org>
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['null', 'turbo_sw', 'fpga_lte_fec', 'fpga_5gnr_fec']
 
 config_flag_fmt = 'RTE_LIBRTE_PMD_BBDEV_@0@'

drivers/bus/ifpga/meson.build

@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2010-2018 Intel Corporation
 
+if is_windows
+	build = false
+	reason = 'not supported on Windows'
+	subdir_done()
+endif
+
 deps += ['pci', 'kvargs', 'rawdev']
 install_headers('rte_bus_ifpga.h')
 sources = files('ifpga_common.c', 'ifpga_bus.c')

drivers/bus/pci/meson.build

@@ -4,16 +4,22 @@
 deps += ['pci']
 install_headers('rte_bus_pci.h')
 sources = files('pci_common.c',
-	'pci_common_uio.c',
 	'pci_params.c')
 if is_linux
-	sources += files('linux/pci.c',
+	sources += files('pci_common_uio.c',
+			'linux/pci.c',
 			'linux/pci_uio.c',
 			'linux/pci_vfio.c')
 	includes += include_directories('linux')
-else
-	sources += files('bsd/pci.c')
+endif
+if is_freebsd
+	sources += files('pci_common_uio.c',
+			'bsd/pci.c')
 	includes += include_directories('bsd')
 endif
+if is_windows
+	sources += files('windows/pci.c')
+	includes += include_directories('windows')
+endif
 
 deps += ['kvargs']

drivers/bus/pci/pci_common.c

@@ -10,8 +10,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/queue.h>
-#include <sys/mman.h>
-
 #include <rte_errno.h>
 #include <rte_interrupts.h>
 #include <rte_log.h>

drivers/bus/pci/windows/pci.c

@@ -0,0 +1,169 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2020 Mellanox Technologies, Ltd
+ */
+#include <rte_errno.h>
+#include <rte_log.h>
+
+#include <rte_string_fns.h>
+#include <rte_eal_memconfig.h>
+
+#include "private.h"
+
+/* The functions below are not implemented on Windows,
+ * but need to be defined for compilation purposes
+ */
+
+/* Map pci device */
+int
+rte_pci_map_device(struct rte_pci_device *dev __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return 0;
+}
+
+/* Unmap pci device */
+void
+rte_pci_unmap_device(struct rte_pci_device *dev __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+}
+
+int
+pci_update_device(const struct rte_pci_addr *addr __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return 0;
+}
+
+/* Read PCI config space. */
+int
+rte_pci_read_config(const struct rte_pci_device *dev __rte_unused,
+	void *buf __rte_unused, size_t len __rte_unused,
+	off_t offset __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return 0;
+}
+
+/* Write PCI config space. */
+int
+rte_pci_write_config(const struct rte_pci_device *dev __rte_unused,
+	const void *buf __rte_unused, size_t len __rte_unused,
+	off_t offset __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return 0;
+}
+
+enum rte_iova_mode
+pci_device_iova_mode(const struct rte_pci_driver *pdrv __rte_unused,
+		const struct rte_pci_device *pdev __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return RTE_IOVA_DC;
+}
+
+int
+rte_pci_ioport_map(struct rte_pci_device *dev __rte_unused,
+	int bar __rte_unused, struct rte_pci_ioport *p __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return -1;
+}
+
+
+void
+rte_pci_ioport_read(struct rte_pci_ioport *p __rte_unused,
+	void *data __rte_unused, size_t len __rte_unused,
+	off_t offset __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+}
+
+int
+rte_pci_ioport_unmap(struct rte_pci_ioport *p __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return -1;
+}
+
+bool
+pci_device_iommu_support_va(const struct rte_pci_device *dev __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return false;
+}
+
+void
+rte_pci_ioport_write(struct rte_pci_ioport *p __rte_unused,
+		const void *data __rte_unused, size_t len __rte_unused,
+		off_t offset __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+}
+
+
+/* remap the PCI resource of a PCI device in anonymous virtual memory */
+int
+pci_uio_remap_resource(struct rte_pci_device *dev __rte_unused)
+{
+	/* This function is not implemented on Windows.
+	 * We really should short-circuit the call to these functions by
+	 * clearing the RTE_PCI_DRV_NEED_MAPPING flag
+	 * in the rte_pci_driver flags.
+	 */
+	return -1;
+}
+/*
+ * Scan the contents of the PCI bus
+ * and add all network class devices into the devices list.
+ */
+int
+rte_pci_scan(void)
+{
+	return 0;
+}

drivers/bus/vdev/meson.build

@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+if is_windows
+	build = false
+	reason = 'not supported on Windows'
+	subdir_done()
+endif
+
 sources = files('vdev.c',
 	'vdev_params.c')
 install_headers('rte_bus_vdev.h')

drivers/bus/vmbus/meson.build

@@ -1,5 +1,12 @@
 # SPDX-License-Identifier: BSD-3-Clause
 
+if is_windows
+	build = false
+	reason = 'not supported on Windows'
+	subdir_done()
+endif
+
+
 install_headers('rte_bus_vmbus.h','rte_vmbus_reg.h')
 
 sources = files('vmbus_common.c',

drivers/common/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Cavium, Inc
 
+if is_windows
+	subdir_done()
+endif
+
 std_deps = ['eal']
 drivers = ['cpt', 'dpaax', 'iavf', 'mlx5', 'mvep', 'octeontx', 'octeontx2', 'qat']
 config_flag_fmt = 'RTE_LIBRTE_@0@_COMMON'

drivers/compress/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Intel Corporation
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['isal', 'octeontx', 'qat', 'zlib']
 
 std_deps = ['compressdev'] # compressdev pulls in all other needed deps

drivers/crypto/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['aesni_gcm',
 	   'aesni_mb',
 	   'armv8',

drivers/event/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['dpaa', 'dpaa2', 'octeontx2', 'opdl', 'skeleton', 'sw', 'dsw']
 if not (toolchain == 'gcc' and cc.version().version_compare('<4.8.6') and
 	dpdk_conf.has('RTE_ARCH_ARM64'))

drivers/mempool/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['bucket', 'dpaa', 'dpaa2', 'octeontx', 'octeontx2', 'ring', 'stack']
 std_deps = ['mempool']
 config_flag_fmt = 'RTE_LIBRTE_@0@_MEMPOOL'

drivers/meson.build

@@ -1,10 +1,6 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017-2019 Intel Corporation
 
-if is_windows
-	subdir_done()
-endif
-
 # Defines the order in which the drivers are buit.
 dpdk_driver_classes = ['common',
 	       'bus',

drivers/net/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2017 Intel Corporation
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['af_packet',
 	'af_xdp',
 	'ark',

drivers/raw/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright 2018 NXP
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['dpaa2_cmdif', 'dpaa2_qdma',
 	'ifpga', 'ioat', 'ntb',
 	'octeontx2_dma',

drivers/vdpa/meson.build

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright 2019 Mellanox Technologies, Ltd
 
+if is_windows
+	subdir_done()
+endif
+
 drivers = ['ifc',
 	   'mlx5',]
 std_deps = ['bus_pci', 'kvargs']

lib/librte_eal/common/meson.build

@@ -9,6 +9,7 @@ if is_windows
 		'eal_common_class.c',
 		'eal_common_config.c',
 		'eal_common_debug.c',
+		'eal_common_dev.c',
 		'eal_common_devargs.c',
 		'eal_common_dynmem.c',
 		'eal_common_errno.c',

lib/librte_eal/rte_eal_exports.def

@@ -3,6 +3,10 @@ EXPORTS
 	per_lcore__rte_errno
 	rte_calloc
 	rte_calloc_socket
+	rte_bus_register
+	rte_dev_is_probed
+	rte_devargs_next
+	rte_devargs_remove
 	rte_eal_get_configuration
 	rte_eal_has_hugepages
 	rte_eal_init
@@ -48,6 +52,9 @@ EXPORTS
 	rte_memzone_reserve_bounded
 	rte_memzone_walk
 	rte_strerror
+	rte_strsplit
+	rte_vfio_container_dma_map
+	rte_vfio_container_dma_unmap
 	rte_vlog
 	rte_realloc
 	rte_zmalloc

lib/librte_eal/windows/eal.c

@@ -18,6 +18,7 @@
 #include <eal_options.h>
 #include <eal_private.h>
 #include <rte_trace_point.h>
+#include <rte_vfio.h>
 
 #include "eal_hugepages.h"
 #include "eal_windows.h"
@@ -247,7 +248,7 @@ rte_eal_cleanup(void)
 int
 rte_eal_init(int argc, char **argv)
 {
-	int i, fctret;
+	int i, fctret, bscan;
 	const struct rte_config *config = rte_eal_get_configuration();
 	struct internal_config *internal_conf =
 		eal_get_internal_configuration();
@@ -334,6 +335,13 @@ rte_eal_init(int argc, char **argv)
 
 	eal_thread_init_master(config->master_lcore);
 
+	bscan = rte_bus_scan();
+	if (bscan < 0) {
+		rte_eal_init_alert("Cannot init PCI");
+		rte_errno = ENODEV;
+		return -1;
+	}
+
 	RTE_LCORE_FOREACH_SLAVE(i) {
 
 		/*
@@ -362,3 +370,21 @@ rte_eal_init(int argc, char **argv)
 	rte_eal_mp_wait_lcore();
 	return fctret;
 }
+
+int
+rte_vfio_container_dma_map(__rte_unused int container_fd,
+			__rte_unused uint64_t vaddr,
+			__rte_unused uint64_t iova,
+			__rte_unused uint64_t len)
+{
+	return -1;
+}
+
+int
+rte_vfio_container_dma_unmap(__rte_unused int container_fd,
+			__rte_unused uint64_t vaddr,
+			__rte_unused uint64_t iova,
+			__rte_unused uint64_t len)
+{
+	return -1;
+}

lib/librte_eal/windows/eal_mp.c

@@ -16,6 +16,7 @@
 #include "eal_private.h"
 #include "eal_windows.h"
 #include "malloc_mp.h"
+#include "hotplug_mp.h"
 
 void
 rte_mp_channel_cleanup(void)
@@ -101,3 +102,17 @@ request_sync(void)
 	EAL_LOG_STUB();
 	return 0;
 }
+
+int
+eal_dev_hotplug_request_to_primary(struct eal_dev_mp_req *req)
+{
+	RTE_SET_USED(req);
+	return 0;
+}
+
+int
+eal_dev_hotplug_request_to_secondary(struct eal_dev_mp_req *req)
+{
+	RTE_SET_USED(req);
+	return 0;
+}