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To: Hemant Agrawal <hemant.agrawal@nxp.com>, <dev@dpdk.org>
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CC: <thomas.monjalon@6wind.com>, <bruce.richardson@intel.com>,
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From: Shreyansh Jain <shreyansh.jain@nxp.com>
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Date: Wed, 7 Dec 2016 15:43:23 +0530
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Subject: Re: [dpdk-dev] [PATCH 10/32] net/dpaa2: introducing dpaa2 bus
driver for fsl-mc bus
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X-List-Received-Date: Wed, 07 Dec 2016 10:10:42 -0000
+ CC: David Marchand
On Sunday 04 December 2016 11:47 PM, Hemant Agrawal wrote:
> The DPAA2 bus driver is a rte_bus driver which scans the fsl-mc bus.
>
> Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>
> ---
> drivers/net/Makefile | 2 +-
> drivers/net/dpaa2/Makefile | 60 ++++++++++++++
> drivers/net/dpaa2/dpaa2_bus.c | 99 +++++++++++++++++++++++
> drivers/net/dpaa2/rte_dpaa2.h | 121 ++++++++++++++++++++++++++++
> drivers/net/dpaa2/rte_pmd_dpaa2_version.map | 4 +
> mk/rte.app.mk | 1 +
> 6 files changed, 286 insertions(+), 1 deletion(-)
> create mode 100644 drivers/net/dpaa2/Makefile
> create mode 100644 drivers/net/dpaa2/dpaa2_bus.c
> create mode 100644 drivers/net/dpaa2/rte_dpaa2.h
> create mode 100644 drivers/net/dpaa2/rte_pmd_dpaa2_version.map
>
> diff --git a/drivers/net/Makefile b/drivers/net/Makefile
> index bc93230..2bcf67b 100644
> --- a/drivers/net/Makefile
> +++ b/drivers/net/Makefile
> @@ -55,7 +55,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += thunderx
> DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio
> DIRS-$(CONFIG_RTE_LIBRTE_VMXNET3_PMD) += vmxnet3
> DIRS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += xenvirt
> -
> +DIRS-$(CONFIG_RTE_LIBRTE_DPAA2_PMD) += dpaa2
> ifeq ($(CONFIG_RTE_LIBRTE_VHOST),y)
> DIRS-$(CONFIG_RTE_LIBRTE_PMD_VHOST) += vhost
> endif # $(CONFIG_RTE_LIBRTE_VHOST)
> diff --git a/drivers/net/dpaa2/Makefile b/drivers/net/dpaa2/Makefile
> new file mode 100644
> index 0000000..a99ce22
> --- /dev/null
> +++ b/drivers/net/dpaa2/Makefile
> @@ -0,0 +1,60 @@
> +# BSD LICENSE
> +#
> +# Copyright (c) 2016 NXP. All rights reserved.
> +#
> +# Redistribution and use in source and binary forms, with or without
> +# modification, are permitted provided that the following conditions
> +# are met:
> +#
> +# * Redistributions of source code must retain the above copyright
> +# notice, this list of conditions and the following disclaimer.
> +# * Redistributions in binary form must reproduce the above copyright
> +# notice, this list of conditions and the following disclaimer in
> +# the documentation and/or other materials provided with the
> +# distribution.
> +# * Neither the name of NXP nor the names of its
> +# contributors may be used to endorse or promote products derived
> +# from this software without specific prior written permission.
> +#
> +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> +
> +include $(RTE_SDK)/mk/rte.vars.mk
> +
> +#
> +# library name
> +#
> +LIB = librte_pmd_dpaa2.a
> +
> +CFLAGS += -O3
> +CFLAGS += $(WERROR_FLAGS)
> +
> +CFLAGS += -I$(RTE_SDK)/drivers/net/dpaa2
> +CFLAGS += -I$(RTE_SDK)/lib/librte_eal/common/
> +CFLAGS += -I$(RTE_SDK)/lib/librte_eal/linuxapp/eal
> +
> +# versioning export map
> +EXPORT_MAP := rte_pmd_dpaa2_version.map
> +
> +# library version
> +LIBABIVER := 1
> +
> +
> +# Interfaces with DPDK
> +SRCS-$(CONFIG_RTE_LIBRTE_DPAA2_PMD) += dpaa2_bus.c
> +
> +# library dependencies
> +DEPDIRS-y += lib/librte_eal
> +DEPDIRS-y += drivers/common/dpaa/mc
> +DEPDIRS-y += drivers/common/dpaa/qbman
> +
> +include $(RTE_SDK)/mk/rte.lib.mk
> diff --git a/drivers/net/dpaa2/dpaa2_bus.c b/drivers/net/dpaa2/dpaa2_bus.c
> new file mode 100644
> index 0000000..571066c
> --- /dev/null
> +++ b/drivers/net/dpaa2/dpaa2_bus.c
> @@ -0,0 +1,99 @@
> +/*-
> + * BSD LICENSE
> + *
> + * Copyright (c) 2016 NXP. All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + *
> + * * Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * * Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in
> + * the documentation and/or other materials provided with the
> + * distribution.
> + * * Neither the name of NXP nor the names of its
> + * contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#include <string.h>
> +#include <dirent.h>
> +
> +#include <rte_log.h>
> +#include <rte_bus.h>
> +#include <rte_dpaa2.h>
> +#include <rte_eal_memconfig.h>
> +#include <rte_malloc.h>
> +#include <rte_devargs.h>
> +#include <rte_memcpy.h>
> +#include <rte_ethdev.h>
> +
> +#include "eal_filesystem.h"
> +#include "eal_private.h"
> +
> +void
> +rte_dpaa2_register(struct rte_dpaa2_driver *driver)
> +{
> + struct rte_bus *bus;
> +
> + bus = rte_eal_get_bus("dpaa2");
> + if (!bus) {
> + RTE_LOG(ERR, EAL, "DPAA2 bus not registered\n");
> + return;
> + }
> +
> + rte_eal_bus_add_driver(bus, &driver->driver);
> +}
> +
> +void
> +rte_dpaa2_unregister(struct rte_dpaa2_driver *driver)
> +{
> + struct rte_bus *bus;
> +
> + bus = driver->driver.bus;
> + if (!bus) {
> + RTE_LOG(ERR, EAL, "Unable to find bus for device\n");
> + return;
> + }
> +
> + rte_eal_bus_remove_driver(&driver->driver);
> +}
> +
> +int rte_dpaa2_probe(struct rte_driver *driver __rte_unused,
> + struct rte_device *device __rte_unused)
> +{
> + return 0;
> +}
> +
> +int rte_dpaa2_scan(struct rte_bus *bus_d __rte_unused)
> +{
> + return 0;
> +}
> +
> +int rte_dpaa2_match(struct rte_driver *driver __rte_unused,
> + struct rte_device *device __rte_unused)
> +{
> + return 0;
> +}
> +
> +struct rte_bus dpaa2_bus = {
> + .scan = rte_dpaa2_scan,
> + .match = rte_dpaa2_match,
> + .probe = rte_dpaa2_probe,
> +};
> +
> +RTE_REGISTER_BUS(dpaa2, dpaa2_bus);
> diff --git a/drivers/net/dpaa2/rte_dpaa2.h b/drivers/net/dpaa2/rte_dpaa2.h
> new file mode 100644
> index 0000000..b36eed8
> --- /dev/null
> +++ b/drivers/net/dpaa2/rte_dpaa2.h
> @@ -0,0 +1,121 @@
> +/*-
> + * BSD LICENSE
> + *
> + * Copyright (c) 2016 NXP. All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + *
> + * * Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * * Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in
> + * the documentation and/or other materials provided with the
> + * distribution.
> + * * Neither the name of NXP nor the names of its
> + * contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#ifndef _RTE_DPAA2_H_
> +#define _RTE_DPAA2_H_
> +
> +/**
> + * @file
> + *
> + * RTE DPAA2 Interface
> + */
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <limits.h>
> +#include <errno.h>
> +#include <sys/queue.h>
> +#include <stdint.h>
> +#include <inttypes.h>
> +
> +#include <rte_debug.h>
> +#include <rte_interrupts.h>
> +#include <rte_dev.h>
> +
> +
> +struct rte_dpaa2_driver;
> +/**
> + * A structure describing a DPAA2 device.
> + */
> +struct rte_dpaa2_device {
> + TAILQ_ENTRY(rte_dpaa2_device) next; /**< Next probed DPAA2 device. */
> + struct rte_device device; /**< Inherit core device */
> + uint16_t dev_type; /**< Device Type */
> + uint16_t object_id; /**< DPAA2 Object ID */
> + struct rte_intr_handle intr_handle; /**< Interrupt handle */
> + struct rte_dpaa2_driver *driver; /**< Associated driver */
> +};
> +
> +/**
> + * A structure describing a DPAA2 driver.
> + */
> +struct rte_dpaa2_driver {
> + TAILQ_ENTRY(rte_dpaa2_driver) next; /**< Next in list. */
> + struct rte_driver driver; /**< Inherit core driver. */
> + uint32_t drv_flags; /**< Flags contolling handling of device. */
> +};
> +
> +/**
> + * Register a DPAA2 driver.
> + *
> + * @param driver
> + * A pointer to a rte_dpaa2_driver structure describing the driver
> + * to be registered.
> + */
> +void rte_dpaa2_register(struct rte_dpaa2_driver *driver);
> +
> +/**
> + * Unregister a DPAA2 driver.
> + *
> + * @param driver
> + * A pointer to a rte_dpaa2_driver structure describing the driver
> + * to be unregistered.
> + */
> +void rte_dpaa2_unregister(struct rte_dpaa2_driver *driver);
> +
> +/**
> + *
> + */
> +int rte_dpaa2_probe(struct rte_driver *driver, struct rte_device *device);
> +int rte_dpaa2_match(struct rte_driver *driver, struct rte_device *device);
> +int rte_dpaa2_scan(struct rte_bus *bus);
> +
> +/** Helper for DPAA2 device registration from driver (eth, crypto) instance */
> +#define RTE_PMD_REGISTER_DPAA2(nm, dpaa2_drv) \
> +RTE_INIT(dpaa2initfn_ ##nm); \
> +static void dpaa2initfn_ ##nm(void) \
> +{\
> + (dpaa2_drv).driver.name = RTE_STR(nm);\
> + rte_dpaa2_register(&dpaa2_drv); \
> +} \
> +RTE_PMD_EXPORT_NAME(nm, __COUNTER__)
> +
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif /* _RTE_DPAA2_H_ */
> diff --git a/drivers/net/dpaa2/rte_pmd_dpaa2_version.map b/drivers/net/dpaa2/rte_pmd_dpaa2_version.map
> new file mode 100644
> index 0000000..31eca32
> --- /dev/null
> +++ b/drivers/net/dpaa2/rte_pmd_dpaa2_version.map
> @@ -0,0 +1,4 @@
> +DPDK_17.02 {
> +
> + local: *;
> +};
> diff --git a/mk/rte.app.mk b/mk/rte.app.mk
> index f75f0e2..9e1c17c 100644
> --- a/mk/rte.app.mk
> +++ b/mk/rte.app.mk
> @@ -101,6 +101,7 @@ _LDLIBS-$(CONFIG_RTE_LIBRTE_CFGFILE) += -lrte_cfgfile
>
> _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_BOND) += -lrte_pmd_bond
> _LDLIBS-$(CONFIG_RTE_LIBRTE_PMD_XENVIRT) += -lrte_pmd_xenvirt -lxenstore
> +_LDLIBS-$(CONFIG_RTE_LIBRTE_DPAA2_PMD) += -lrte_pmd_dpaa2 -ldpaa2_mc -ldpaa2_qbman
>
> ifeq ($(CONFIG_RTE_BUILD_SHARED_LIB),n)
> # plugins (link only if static libraries)
>
IMO, the way Bus is kept is debatable.
- should it be in EAL (lib/librte_eal/linuxapp/eal_pci.c like Bus
patches) [1]?
- Should it a 'handler/driver' parallel to device drivers?
I personally prefer a clean layer for buses with:
- RTE_SDK/drivers/net/dpaa2/
- RTE_SDK/drivers/bus
- RTE_SDK/drivers/bus/dpaa2/
- RTE_SDK/drivers/bus/dpaa2/dpaa2_bus.c etc.
For PCI, which is generic (or for other similar generic buses, like
platform), we can keep the implementation within lib/librte_eal/linuxapp/*.
What do other think about this?
[1] http://dpdk.org/ml/archives/dev/2016-December/051359.html