[dpdk-dev] [PATCH v2] doc: update nic overview

Chen, Jing D jing.d.chen at intel.com
Tue Apr 5 10:49:24 CEST 2016


Thomas,


> -----Original Message-----
> From: Thomas Monjalon [mailto:thomas.monjalon at 6wind.com]
> Sent: Saturday, April 02, 2016 5:40 AM
> To: Chen, Jing D
> Cc: dev at dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v2] doc: update nic overview
> 
> 2016-04-01 16:55, Chen Jing D:
> > Add feature support list for fm10k, fm10k-vec, fm10kvf and
> > fm10kvf-vec.
> 
> Please help me to understand what is fm10kvf.
> I see only one fm10k driver:
> % git grep 'struct eth_driver' drivers/net/fm10k/
> drivers/net/fm10k/fm10k_ethdev.c:static struct eth_driver rte_pmd_fm10k
> = {

You can refer to below definition:

static const struct rte_pci_id pci_id_fm10k_map[] = {
#define RTE_PCI_DEV_ID_DECL_FM10K(vend, dev) { RTE_PCI_DEVICE(vend, dev) },
#define RTE_PCI_DEV_ID_DECL_FM10KVF(vend, dev) { RTE_PCI_DEVICE(vend, dev) },
#include "rte_pci_dev_ids.h"
	{ .vendor_id = 0, /* sentinel */ },
};

As you can see that fm10k driver will manage 2 different types of devices, PF and VF. 
We can say that there are 2 drivers under fm10k directory. The aspects that not applicable
to PF/VF will use condition check to control execution path. This makes driver can work with
PF and VF devices and reduce redundant code. 


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