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From: David Marchand <david.marchand@redhat.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: dev <dev@dpdk.org>, "Xia, Chenbo" <chenbo.xia@intel.com>,
	 Olivier Matz <olivier.matz@6wind.com>,
	Adrian Moreno Zapata <amorenoz@redhat.com>
Subject: Re: [dpdk-dev] [PATCH 05/40] net/virtio: move PCI device init in dedicated file
Date: Tue, 5 Jan 2021 22:19:09 +0100
Message-ID: <CAJFAV8zX3Zehoo7AsPf2267438dMJkWOhcDuar87-ofVSax2zA@mail.gmail.com> (raw)
In-Reply-To: <20201220211405.313012-6-maxime.coquelin@redhat.com>

On Sun, Dec 20, 2020 at 10:14 PM Maxime Coquelin
<maxime.coquelin@redhat.com> wrote:
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
> index 99a5a1bb88..ca21a019e5 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c

[...]

> @@ -2135,52 +2078,7 @@ virtio_dev_devargs_parse(struct rte_devargs *devargs, int *vdpa,
>         return ret;
>  }
>
> -static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
> -       struct rte_pci_device *pci_dev)
> -{
> -       int vdpa = 0;
> -       int ret = 0;
> -
> -       ret = virtio_dev_devargs_parse(pci_dev->device.devargs, &vdpa, NULL,
> -               NULL);
> -       if (ret < 0) {
> -               PMD_INIT_LOG(ERR, "devargs parsing is failed");
> -               return ret;
> -       }
> -       /* virtio pmd skips probe if device needs to work in vdpa mode */
> -       if (vdpa == 1)
> -               return 1;
> -
> -       return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev),
> -               eth_virtio_dev_init);
> -}
> -
> -static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
> -{
> -       int ret;
> -
> -       ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
> -       /* Port has already been released by close. */
> -       if (ret == -ENODEV)
> -               ret = 0;
> -       return ret;
> -}
> -
> -static struct rte_pci_driver rte_virtio_pmd = {
> -       .driver = {
> -               .name = "net_virtio",
> -       },
> -       .id_table = pci_id_virtio_map,
> -       .drv_flags = 0,
> -       .probe = eth_virtio_pci_probe,
> -       .remove = eth_virtio_pci_remove,
> -};
>
> -RTE_INIT(rte_virtio_pmd_init)
> -{
> -       rte_eal_iopl_init();
> -       rte_pci_register(&rte_virtio_pmd);
> -}
>

Leaving three empty lines if I count correctly.


>  static bool
>  rx_offload_enabled(struct virtio_hw *hw)
> @@ -2521,7 +2419,7 @@ static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
>  /*
>   * Stop device: disable interrupt and mark link down
>   */
> -static int
> +int
>  virtio_dev_stop(struct rte_eth_dev *dev)
>  {
>         struct virtio_hw *hw = dev->data->dev_private;
> @@ -2673,7 +2571,5 @@ __rte_unused uint8_t is_rx)
>  }
>
>  RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);

This belongs with the rest of the pci driver declarations.

$ ./usertools/dpdk-pmdinfo.py
$HOME/builds/build-gcc-shared/drivers/librte_net_virtio.so
PMD NAME: net_virtio_user
PMD PARAMETERS: path=<path> mac=<mac addr> cq=<int> queue_size=<int>
queues=<int> iface=<string> server=<0|1> mrg_rxbuf=<0|1>
in_order=<0|1> packed_vq=<0|1> speed=<int> vectorized=<0|1>

PMD NAME: net_virtio

^^^
Here, I would expect the pci table and the kmod dependencies.


This makes me realise that the net_virtio_user driver is not exported
(but it seems to work without it.. interesting).


> -RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
> -RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
>  RTE_LOG_REGISTER(virtio_logtype_init, pmd.net.virtio.init, NOTICE);
>  RTE_LOG_REGISTER(virtio_logtype_driver, pmd.net.virtio.driver, NOTICE);
> diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h
> index b7d52d497f..13395937c8 100644
> --- a/drivers/net/virtio/virtio_ethdev.h
> +++ b/drivers/net/virtio/virtio_ethdev.h
> @@ -117,6 +117,8 @@ void virtio_interrupt_handler(void *param);
>
>  int virtio_dev_pause(struct rte_eth_dev *dev);
>  void virtio_dev_resume(struct rte_eth_dev *dev);
> +int virtio_dev_stop(struct rte_eth_dev *dev);
> +int virtio_dev_close(struct rte_eth_dev *dev);
>  int virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
>                 int nb_pkts);
>
> diff --git a/drivers/net/virtio/virtio_pci_ethdev.c b/drivers/net/virtio/virtio_pci_ethdev.c
> new file mode 100644
> index 0000000000..9c0935068e
> --- /dev/null
> +++ b/drivers/net/virtio/virtio_pci_ethdev.c
> @@ -0,0 +1,148 @@
> +/* SPDX-License-Identifier: BSD-3-Clause
> + * Copyright(c) 2010-2016 Intel Corporation
> + */
> +
> +#include <stdint.h>
> +#include <string.h>
> +#include <stdio.h>
> +#include <errno.h>
> +#include <unistd.h>
> +
> +#include <rte_ethdev_driver.h>
> +#include <rte_ethdev_pci.h>
> +#include <rte_pci.h>
> +#include <rte_bus_pci.h>
> +#include <rte_errno.h>
> +
> +#include <rte_memory.h>
> +#include <rte_eal.h>
> +#include <rte_dev.h>
> +#include <rte_kvargs.h>
> +
> +#include "virtio_ethdev.h"
> +#include "virtio_pci.h"
> +#include "virtio_logs.h"
> +
> +/*
> + * The set of PCI devices this driver supports
> + */
> +static const struct rte_pci_id pci_id_virtio_map[] = {
> +       { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
> +       { RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
> +       { .vendor_id = 0, /* sentinel */ },
> +};
> +
> +static int
> +eth_virtio_pci_init(struct rte_eth_dev *eth_dev)
> +{
> +       return eth_virtio_dev_init(eth_dev);
> +}
> +
> +static int
> +eth_virtio_pci_uninit(struct rte_eth_dev *eth_dev)
> +{
> +       int ret;
> +       PMD_INIT_FUNC_TRACE();
> +
> +       if (rte_eal_process_type() == RTE_PROC_SECONDARY)
> +               return 0;
> +
> +       ret = virtio_dev_stop(eth_dev);
> +       virtio_dev_close(eth_dev);
> +
> +       PMD_INIT_LOG(DEBUG, "dev_uninit completed");
> +
> +       return ret;
> +}
> +
> +static int vdpa_check_handler(__rte_unused const char *key,
> +               const char *value, void *ret_val)
> +{
> +       if (strcmp(value, "1") == 0)
> +               *(int *)ret_val = 1;
> +       else
> +               *(int *)ret_val = 0;
> +
> +       return 0;
> +}
> +
> +#define VIRTIO_ARG_VDPA       "vdpa"
> +
> +static int
> +virtio_pci_devargs_parse(struct rte_devargs *devargs, int *vdpa)
> +{
> +       struct rte_kvargs *kvlist;
> +       int ret = 0;
> +
> +       if (devargs == NULL)
> +               return 0;
> +
> +       kvlist = rte_kvargs_parse(devargs->args, NULL);
> +       if (kvlist == NULL) {
> +               PMD_INIT_LOG(ERR, "error when parsing param");
> +               return 0;
> +       }
> +
> +       if (vdpa && rte_kvargs_count(kvlist, VIRTIO_ARG_VDPA) == 1) {

I would remove this check on vdpa pointer being NULL, as it gets
passed on the stack by a single caller in this file.


> +               /* vdpa mode selected when there's a key-value pair:
> +                * vdpa=1
> +                */
> +               ret = rte_kvargs_process(kvlist, VIRTIO_ARG_VDPA,
> +                               vdpa_check_handler, vdpa);
> +               if (ret < 0)
> +                       PMD_INIT_LOG(ERR, "Failed to parse %s", VIRTIO_ARG_VDPA);
> +       }
> +
> +       rte_kvargs_free(kvlist);
> +
> +       return ret;
> +}
> +
> +static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
> +       struct rte_pci_device *pci_dev)
> +{
> +       int vdpa = 0;
> +       int ret = 0;
> +
> +       ret = virtio_pci_devargs_parse(pci_dev->device.devargs, &vdpa);
> +       if (ret < 0) {
> +               PMD_INIT_LOG(ERR, "devargs parsing is failed");
> +               return ret;
> +       }
> +       /* virtio pmd skips probe if device needs to work in vdpa mode */
> +       if (vdpa == 1)
> +               return 1;
> +
> +       return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_pci_dev),
> +               eth_virtio_pci_init);
> +}
> +
> +static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
> +{
> +       int ret;
> +
> +       ret = rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_pci_uninit);
> +       /* Port has already been released by close. */
> +       if (ret == -ENODEV)
> +               ret = 0;
> +       return ret;
> +}
> +
> +static struct rte_pci_driver rte_virtio_pmd = {

This seems too generic.

virtio_pci_pmd ?

> +       .driver = {
> +               .name = "net_virtio",
> +       },
> +       .id_table = pci_id_virtio_map,
> +       .drv_flags = 0,
> +       .probe = eth_virtio_pci_probe,
> +       .remove = eth_virtio_pci_remove,
> +};
> +
> +RTE_INIT(rte_virtio_pmd_init)

virtio_pci_pmd_init ?


> +{
> +       rte_eal_iopl_init();
> +       rte_pci_register(&rte_virtio_pmd);
> +}
> +
> +RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
> +RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");


--
David Marchand


  parent reply	other threads:[~2021-01-05 21:19 UTC|newest]

Thread overview: 149+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-20 21:13 [dpdk-dev] [PATCH 00/40] net/virtio: Virtio PMD rework Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 01/40] bus/vdev: add helper to get vdev from eth dev Maxime Coquelin
2020-12-30  3:02   ` Xia, Chenbo
2021-01-05 21:15   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 02/40] net/virtio: Introduce Virtio bus type Maxime Coquelin
2020-12-30  3:02   ` Xia, Chenbo
2021-01-05 21:15   ` David Marchand
2021-01-14  9:24     ` Maxime Coquelin
2021-01-14 10:54       ` Maxime Coquelin
2021-01-14 11:55         ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 03/40] net/virtio: refactor virtio-user device Maxime Coquelin
2020-12-30  3:02   ` Xia, Chenbo
2021-01-05 21:16   ` David Marchand
2021-01-14  9:26     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 04/40] net/virtio: introduce PCI device metadata Maxime Coquelin
2020-12-30  3:02   ` Xia, Chenbo
2021-01-05 21:16   ` David Marchand
2021-01-14 11:05     ` Maxime Coquelin
2021-01-14 14:40       ` David Marchand
2021-01-14 14:44         ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 05/40] net/virtio: move PCI device init in dedicated file Maxime Coquelin
2020-12-30  3:02   ` Xia, Chenbo
2021-01-05 21:19   ` David Marchand [this message]
2021-01-14 16:04     ` Maxime Coquelin
2021-01-14 16:14       ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 06/40] net/virtio: move PCI specific dev init to PCI ethdev init Maxime Coquelin
2020-12-30  3:05   ` Xia, Chenbo
2021-01-06  8:58   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 07/40] net/virtio: move MSIX detection to PCI ethdev Maxime Coquelin
2020-12-30  3:05   ` Xia, Chenbo
2021-01-06  8:22   ` David Marchand
2021-01-14 17:19     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 08/40] net/virtio: force IOVA as VA mode for Virtio-user Maxime Coquelin
2020-12-30  3:06   ` Xia, Chenbo
2021-01-06  9:06   ` David Marchand
2021-01-06  9:11     ` Thomas Monjalon
2021-01-06  9:22       ` Maxime Coquelin
2021-01-06 16:37       ` Kinsella, Ray
2021-01-06  9:14     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 09/40] net/virtio: store PCI type in Virtio device metadata Maxime Coquelin
2020-12-30  3:07   ` Xia, Chenbo
2021-01-06  9:14   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 10/40] net/virtio: add callback for device closing Maxime Coquelin
2020-12-30  3:07   ` Xia, Chenbo
2021-01-06  9:33   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 11/40] net/virtio: validate features at bus level Maxime Coquelin
2020-12-30  3:08   ` Xia, Chenbo
2021-01-06  9:33   ` David Marchand
2021-01-15  9:20     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 12/40] net/virtio: remove bus type enum Maxime Coquelin
2020-12-30  3:08   ` Xia, Chenbo
2021-01-06  9:33   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 13/40] net/virtio: move PCI-specific fields to PCI device Maxime Coquelin
2020-12-30  3:08   ` Xia, Chenbo
2021-01-06  9:58   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 14/40] net/virtio: pack virtio HW struct Maxime Coquelin
2020-12-30  3:09   ` Xia, Chenbo
2021-01-06  9:58   ` David Marchand
2021-01-15  9:35     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 15/40] net/virtio: move legacy IO to Virtio PCI Maxime Coquelin
2020-12-30  3:09   ` Xia, Chenbo
2021-01-06 10:09   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 16/40] net/virtio: introduce generic virtio header Maxime Coquelin
2020-12-30  3:09   ` Xia, Chenbo
2021-01-06 10:08   ` David Marchand
2021-01-15  9:39     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 17/40] net/virtio: move features definition to generic header Maxime Coquelin
2020-12-30  3:14   ` Xia, Chenbo
2021-01-14  8:40     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 18/40] net/virtio: move virtqueue defines in " Maxime Coquelin
2020-12-30  3:14   ` Xia, Chenbo
2021-01-06 15:53   ` David Marchand
2021-01-15 10:55     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 19/40] net/virtio: move config definitions to " Maxime Coquelin
2020-12-30  3:15   ` Xia, Chenbo
2021-01-06 16:01   ` David Marchand
2021-01-15 11:01     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 20/40] net/virtio: make interrupt handling more generic Maxime Coquelin
2020-12-30  3:17   ` Xia, Chenbo
2021-01-14  8:43     ` Maxime Coquelin
2021-01-06 16:07   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 21/40] net/virtio: move vring alignment to generic header Maxime Coquelin
2020-12-30  3:18   ` Xia, Chenbo
2021-01-06 16:13   ` David Marchand
2020-12-20 21:13 ` [dpdk-dev] [PATCH 22/40] net/virtio: remove last PCI refs in non-PCI code Maxime Coquelin
2020-12-30  3:25   ` Xia, Chenbo
2021-01-14  8:46     ` Maxime Coquelin
2021-01-06 16:18   ` David Marchand
2021-01-15 11:10     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 23/40] net/virtio: make Vhost-user req sender consistent Maxime Coquelin
2021-01-06 11:50   ` Xia, Chenbo
2021-01-15  9:47     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 24/40] net/virtio: add Virtio-user ops to set owner Maxime Coquelin
2021-01-06 11:50   ` Xia, Chenbo
2020-12-20 21:13 ` [dpdk-dev] [PATCH 25/40] net/virtio: add Virtio-user features ops Maxime Coquelin
2021-01-06 11:54   ` Xia, Chenbo
2021-01-13 13:43     ` Adrian Moreno
2021-01-13 13:54       ` Maxime Coquelin
2021-01-15 14:19       ` Maxime Coquelin
2021-01-13 13:57   ` Adrian Moreno
2021-01-15 14:29     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 26/40] net/virtio: add Virtio-user protocol " Maxime Coquelin
2021-01-06 11:55   ` Xia, Chenbo
2020-12-20 21:13 ` [dpdk-dev] [PATCH 27/40] net/virtio: add Virtio-user memory tables ops Maxime Coquelin
2021-01-06 11:57   ` Xia, Chenbo
2021-01-15  9:57     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 28/40] net/virtio: add Virtio-user vring setting ops Maxime Coquelin
2021-01-05 21:24   ` David Marchand
2021-01-06 12:01   ` Xia, Chenbo
2021-01-15 10:12     ` Maxime Coquelin
2021-01-06 12:03   ` Xia, Chenbo
2021-01-15 10:15     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 29/40] net/virtio: add Virtio-user vring file ops Maxime Coquelin
2021-01-05 21:24   ` David Marchand
2021-01-06 12:04   ` Xia, Chenbo
2021-01-15 10:17     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 30/40] net/virtio: add Virtio-user vring address ops Maxime Coquelin
2021-01-06 12:06   ` Xia, Chenbo
2021-01-15 10:19     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 31/40] net/virtio: add Virtio-user status ops Maxime Coquelin
2021-01-06 12:09   ` Xia, Chenbo
2021-01-15 10:48     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 32/40] net/virtio: remove useless request ops Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 33/40] net/virtio: improve Virtio-user errors handling Maxime Coquelin
2021-01-07  2:26   ` Xia, Chenbo
2021-01-15 11:09     ` Maxime Coquelin
2020-12-20 21:13 ` [dpdk-dev] [PATCH 34/40] net/virtio: move Vhost-user reqs to Vhost-user backend Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 35/40] net/virtio: make server mode blocking Maxime Coquelin
2021-01-07  3:20   ` Xia, Chenbo
2021-01-15 11:13     ` Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 36/40] net/virtio: move protocol features to Vhost-user Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 37/40] net/virtio: introduce backend data Maxime Coquelin
2021-01-05 21:26   ` David Marchand
2021-01-13 17:18   ` Adrian Moreno
2021-01-15 16:49     ` Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 38/40] net/virtio: move Vhost-user specifics to its backend Maxime Coquelin
2021-01-07  6:32   ` Xia, Chenbo
2021-01-15 12:03     ` Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 39/40] net/virtio: move Vhost-kernel data " Maxime Coquelin
2021-01-07  6:42   ` Xia, Chenbo
2021-01-11  8:02   ` Xia, Chenbo
2021-01-15 11:54     ` Maxime Coquelin
2021-01-18 20:36     ` Maxime Coquelin
2020-12-20 21:14 ` [dpdk-dev] [PATCH 40/40] net/virtio: move Vhost-vDPA " Maxime Coquelin
2020-12-22 15:20   ` Maxime Coquelin
2021-01-07  6:50   ` Xia, Chenbo
2021-01-15 12:08     ` Maxime Coquelin
2021-01-11  8:05   ` Xia, Chenbo
2020-12-21 10:58 ` [dpdk-dev] [PATCH 00/40] net/virtio: Virtio PMD rework Maxime Coquelin

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