[dpdk-dev] [PATCH v6 02/19] net/ngbe: support probe and remove

[Andrew Rybchenko]

On 6/17/21 1:59 PM, Jiawen Wu wrote:
> Add device IDs for Wangxun 1Gb NICs, map device IDs to register ngbe
> PMD. Add basic PCIe ethdev probe and remove.
> 
> Signed-off-by: Jiawen Wu <jiawenwu at trustnetic.com>
> ---
>  doc/guides/nics/features/ngbe.ini   |  1 +
>  drivers/net/ngbe/base/meson.build   | 18 +++++++
>  drivers/net/ngbe/base/ngbe_devids.h | 83 +++++++++++++++++++++++++++++
>  drivers/net/ngbe/meson.build        |  6 +++
>  drivers/net/ngbe/ngbe_ethdev.c      | 66 +++++++++++++++++++++--
>  drivers/net/ngbe/ngbe_ethdev.h      | 16 ++++++
>  6 files changed, 186 insertions(+), 4 deletions(-)
>  create mode 100644 drivers/net/ngbe/base/meson.build
>  create mode 100644 drivers/net/ngbe/base/ngbe_devids.h
>  create mode 100644 drivers/net/ngbe/ngbe_ethdev.h
> 
> diff --git a/doc/guides/nics/features/ngbe.ini b/doc/guides/nics/features/ngbe.ini
> index a7a524defc..977286ac04 100644
> --- a/doc/guides/nics/features/ngbe.ini
> +++ b/doc/guides/nics/features/ngbe.ini
> @@ -4,6 +4,7 @@
>  ; Refer to default.ini for the full list of available PMD features.
>  ;
>  [Features]
> +Multiprocess aware   = Y
>  Linux                = Y
>  ARMv8                = Y
>  x86-32               = Y
> diff --git a/drivers/net/ngbe/base/meson.build b/drivers/net/ngbe/base/meson.build
> new file mode 100644
> index 0000000000..c5f6467743
> --- /dev/null
> +++ b/drivers/net/ngbe/base/meson.build
> @@ -0,0 +1,18 @@
> +# SPDX-License-Identifier: BSD-3-Clause
> +# Copyright(c) 2018-2020 Beijing WangXun Technology Co., Ltd.
> +
> +sources = []
> +
> +error_cflags = []
> +
> +c_args = cflags
> +foreach flag: error_cflags
> +	if cc.has_argument(flag)
> +		c_args += flag
> +	endif
> +endforeach

It is a dead code since error_cflags is empty.
It should be added when the first flag is added to
error_cflags.

> +
> +base_lib = static_library('ngbe_base', sources,
> +	dependencies: [static_rte_eal, static_rte_ethdev, static_rte_bus_pci],
> +	c_args: c_args)
> +base_objs = base_lib.extract_all_objects()

[snip]

> diff --git a/drivers/net/ngbe/base/ngbe_devids.h b/drivers/net/ngbe/base/ngbe_devids.h
> diff --git a/drivers/net/ngbe/meson.build b/drivers/net/ngbe/meson.build
> index de2d7be716..81173fa7f0 100644
> --- a/drivers/net/ngbe/meson.build
> +++ b/drivers/net/ngbe/meson.build
> @@ -7,6 +7,12 @@ if is_windows
>  	subdir_done()
>  endif
>  
> +subdir('base')
> +objs = [base_objs]
> +
>  sources = files(
>  	'ngbe_ethdev.c',
>  )
> +
> +includes += include_directories('base')
> +

Trailing empty line should be avoided

> diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
> index f8e19066de..d8df7ef896 100644
> --- a/drivers/net/ngbe/ngbe_ethdev.c
> +++ b/drivers/net/ngbe/ngbe_ethdev.c
> @@ -7,23 +7,81 @@
>  #include <rte_common.h>
>  #include <ethdev_pci.h>
>  
> +#include <base/ngbe_devids.h>

Shouldn't it be #include "ngbe_devids.h" since base is in
includes? It definitely should be in double-quotes since
it is not a system header.

> +#include "ngbe_ethdev.h"
> +
> +/*
> + * The set of PCI devices this driver supports
> + */
> +static const struct rte_pci_id pci_id_ngbe_map[] = {
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A2) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A2S) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A4) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A4S) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860AL2) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860AL2S) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860AL4) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860AL4S) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860NCSI) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A1) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860A1L) },
> +	{ RTE_PCI_DEVICE(PCI_VENDOR_ID_WANGXUN, NGBE_DEV_ID_EM_WX1860AL_W) },
> +	{ .vendor_id = 0, /* sentinel */ },
> +};
> +
> +static int
> +eth_ngbe_dev_init(struct rte_eth_dev *eth_dev, void *init_params __rte_unused)
> +{
> +	struct rte_pci_device *pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
> +
> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
> +		return 0;
> +
> +	rte_eth_copy_pci_info(eth_dev, pci_dev);
> +
> +	return -EINVAL;
> +}
> +
> +static int
> +eth_ngbe_dev_uninit(struct rte_eth_dev *eth_dev)
> +{
> +	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
> +		return 0;
> +
> +	RTE_SET_USED(eth_dev);
> +
> +	return -EINVAL;
> +}
> +
>  static int
>  eth_ngbe_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
>  		struct rte_pci_device *pci_dev)
>  {
> -	RTE_SET_USED(pci_dev);
> -	return -EINVAL;
> +	return rte_eth_dev_create(&pci_dev->device, pci_dev->device.name,
> +			sizeof(struct ngbe_adapter),
> +			eth_dev_pci_specific_init, pci_dev,
> +			eth_ngbe_dev_init, NULL);
>  }
>  
>  static int eth_ngbe_pci_remove(struct rte_pci_device *pci_dev)
>  {
> -	RTE_SET_USED(pci_dev);
> -	return -EINVAL;
> +	struct rte_eth_dev *ethdev;
> +
> +	ethdev = rte_eth_dev_allocated(pci_dev->device.name);
> +	if (ethdev == NULL)
> +		return 0;
> +
> +	return rte_eth_dev_destroy(ethdev, eth_ngbe_dev_uninit);
>  }
>  
>  static struct rte_pci_driver rte_ngbe_pmd = {
> +	.id_table = pci_id_ngbe_map,
> +	.drv_flags = RTE_PCI_DRV_NEED_MAPPING,
>  	.probe = eth_ngbe_pci_probe,
>  	.remove = eth_ngbe_pci_remove,
>  };
>  
>  RTE_PMD_REGISTER_PCI(net_ngbe, rte_ngbe_pmd);
> +RTE_PMD_REGISTER_PCI_TABLE(net_ngbe, pci_id_ngbe_map);
> +RTE_PMD_REGISTER_KMOD_DEP(net_ngbe, "* igb_uio | uio_pci_generic | vfio-pci");
> +
> diff --git a/drivers/net/ngbe/ngbe_ethdev.h b/drivers/net/ngbe/ngbe_ethdev.h
> new file mode 100644
> index 0000000000..38f55f7fb1
> --- /dev/null
> +++ b/drivers/net/ngbe/ngbe_ethdev.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2018-2020 Beijing WangXun Technology Co., Ltd.

2021?

> + * Copyright(c) 2010-2017 Intel Corporation
> + */
> +
> +#ifndef _NGBE_ETHDEV_H_
> +#define _NGBE_ETHDEV_H_
> +
> +/*
> + * Structure to store private data for each driver instance (for each port).
> + */
> +struct ngbe_adapter {
> +	void *back;

It should be a comment above what it is and why it is added.

> +};
> +
> +#endif /* _NGBE_ETHDEV_H_ */
>