From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Cc: dev@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>,
Ferruh Yigit <ferruh.yigit@intel.com>,
"Gonzalez Monroy, Sergio" <sergio.gonzalez.monroy@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2 1/6] ethdev: fix port data mismatched in multiple process model
Date: Wed, 04 Jan 2017 18:34:40 +0100 [thread overview]
Message-ID: <1506472.SIAYXrUjSr@xps13> (raw)
In-Reply-To: <1482922962-21036-2-git-send-email-yuanhan.liu@linux.intel.com>
+Cc Sergio (maintainer of the secondary process thing)
2016-12-28 19:02, Yuanhan Liu:
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -201,9 +201,6 @@ rte_eth_dev_allocate(const char *name)
> return NULL;
> }
>
> - if (rte_eth_dev_data == NULL)
> - rte_eth_dev_data_alloc();
> -
It is dangerous to move this to rte_eth_dev_pci_probe.
Please keep it here and duplicate it in eth_dev_attach.
[...]
> +/*
> + * Attach to a port already registered by the primary process, which
> + * makes sure that the same device would both have the same port id
> + * in the primary and secondary process.
> + */
> +static struct rte_eth_dev *
> +eth_dev_attach(const char *name)
Maybe that the word "secondary" could help to differentiate of
the function rte_eth_dev_attach().
> +{
> + uint8_t i;
> + struct rte_eth_dev *eth_dev;
> +
> + for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
> + if (strcmp(rte_eth_dev_data[i].name, name) == 0)
> + break;
> + }
> + if (i == RTE_MAX_ETHPORTS) {
> + RTE_PMD_DEBUG_TRACE(
> + "device %s is not driven by the primary process\n",
> + name);
> + return NULL;
> + }
> +
> + RTE_ASSERT(eth_dev->data->port_id == i);
> +
> + eth_dev = &rte_eth_devices[i];
> + eth_dev->data = &rte_eth_dev_data[i];
> + eth_dev->attached = DEV_ATTACHED;
> + nb_ports++;
I am a bit nervous when I see these lines duplicated from rte_eth_dev_allocate.
Not sure whether it deserves a common function or not.
[...]
> @@ -246,9 +275,26 @@ rte_eth_dev_pci_probe(struct rte_pci_driver *pci_drv,
> - eth_dev = rte_eth_dev_allocate(ethdev_name);
> - if (eth_dev == NULL)
> - return -ENOMEM;
> + if (rte_eth_dev_data == NULL)
> + rte_eth_dev_data_alloc();
> +
> + if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
> + eth_dev = rte_eth_dev_allocate(ethdev_name);
> + if (eth_dev == NULL)
> + return -ENOMEM;
> + } else {
> + /*
> + * if we failed to attach a device, it means that
> + * device is skipped, due to some errors. Take
> + * virtio-net device as example, it could be the
> + * device is managed by virtio-net kernel driver.
> + * For such case, we return a positive value, to
> + * let EAL skip it as well.
> + */
This comment (a bit too long) should be placed between "if" and "return".
> + eth_dev = eth_dev_attach(ethdev_name);
> + if (eth_dev == NULL)
> + return 1;
> + }
next prev parent reply other threads:[~2017-01-04 17:34 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-22 7:18 [dpdk-dev] [PATCH 0/3] net/virtio: a temp to fix few multiple process issues Yuanhan Liu
2016-12-22 7:18 ` [dpdk-dev] [PATCH 1/3] net/virtio: fix crash for secondary process Yuanhan Liu
2016-12-22 7:18 ` [dpdk-dev] [PATCH 2/3] net/virtio: fix multiple process support Yuanhan Liu
2016-12-22 7:18 ` [dpdk-dev] [PATCH 3/3] net/virtio: fix wrong Rx/Tx method for secondary process Yuanhan Liu
2016-12-22 7:23 ` [dpdk-dev] [PATCH 0/3] net/virtio: a temp to fix few multiple process issues Yuanhan Liu
2016-12-22 8:29 ` Xu, Qian Q
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 0/6] net/virtio: fix several " Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 1/6] ethdev: fix port data mismatched in multiple process model Yuanhan Liu
2017-01-04 17:34 ` Thomas Monjalon [this message]
2017-01-05 6:25 ` Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 2/6] net/virtio: fix wrong Rx/Tx method for secondary process Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 3/6] net/virtio: store PCI operators pointer locally Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 4/6] net/virtio: store IO port info locally Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 5/6] net/virtio: fix multiple process support Yuanhan Liu
2016-12-28 11:14 ` Yuanhan Liu
2016-12-28 11:02 ` [dpdk-dev] [PATCH v2 6/6] net/virtio: remove dead structure field Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 0/6] net/virtio: fix several multiple process issues Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 1/6] ethdev: fix port data mismatched in multiple process model Yuanhan Liu
2017-01-06 13:12 ` Thomas Monjalon
2017-01-06 14:19 ` Yuanhan Liu
2017-01-09 7:50 ` [dpdk-dev] [PATCH v4] " Yuanhan Liu
2017-01-09 17:08 ` Thomas Monjalon
2017-01-10 14:33 ` Yuanhan Liu
2017-01-11 13:32 ` Thomas Monjalon
2017-01-12 3:10 ` Yuanhan Liu
2017-01-19 18:39 ` Ferruh Yigit
2017-01-20 7:58 ` Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 2/6] net/virtio: fix wrong Rx/Tx method for secondary process Yuanhan Liu
2017-01-08 23:15 ` Stephen Hemminger
2017-01-09 5:19 ` Yuanhan Liu
2017-01-09 8:02 ` Xu, Qian Q
2017-01-09 8:05 ` Wei, FangfangX
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 3/6] net/virtio: store PCI operators pointer locally Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 4/6] net/virtio: store IO port info locally Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 5/6] net/virtio: fix multiple process support Yuanhan Liu
2017-01-06 10:16 ` [dpdk-dev] [PATCH v3 6/6] net/virtio: remove dead structure field Yuanhan Liu
2017-01-12 6:02 ` Yuanhan Liu
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