On Wed, Jan 6, 2021 at 5:06 PM Pradeep Kumar Nalla <pna...@marvell.com> wrote: > > > > -----Original Message----- > From: Ferruh Yigit <ferruh.yi...@intel.com> > Sent: Tuesday, January 5, 2021 8:59 PM > To: Pradeep Kumar Nalla <pna...@marvell.com> > Cc: Jerin Jacob Kollanukkaran <jer...@marvell.com>; Satananda Burla > <sbu...@marvell.com>; dev@dpdk.org > Subject: Re: [EXT] Re: [dpdk-dev] [PATCH 00/15] Octeon Tx/Tx2 Endpoint pmd > > On 1/5/2021 2:43 PM, Pradeep Kumar Nalla wrote: > > Please do not top post, reply moved below. > > > Thanks > > Pradeep. > > -----Original Message----- > > From: Ferruh Yigit <ferruh.yi...@intel.com> > > Sent: Monday, January 4, 2021 5:22 PM > > To: Pradeep Kumar Nalla <pna...@marvell.com> > > Cc: Jerin Jacob Kollanukkaran <jer...@marvell.com>; Satananda Burla > > <sbu...@marvell.com>; dev@dpdk.org > > Subject: [EXT] Re: [dpdk-dev] [PATCH 00/15] Octeon Tx/Tx2 Endpoint pmd > > > > External Email > > > > ---------------------------------------------------------------------- > > On 12/31/2020 7:22 AM, Nalla, Pradeep wrote: > >> From: "Nalla Pradeep" <pna...@marvell.com> > >> > >> This patch set contains PMD with minimal set of operations that can > >> drive both Octeon Tx and Tx2 in endpoint. > >> > > > > Hi Pradeep, > > > > There is already octeontx and octeontx2 net drivers, what is the difference > > of the 'endpoint' driver, why it is needed, can you please give more > > information? > > > > Hi Ferruh > > > > This PMD, while running on a host, drives octeontx/octeontx2 over pci bus, > > where as "OcteonTx and OcteonTx2 net drivers" run on respective Tx/Tx2 SOCs > > to make use of h/w blocks present on the SOC. > > > > But aren't they same HW block, either in the SoC or external ethernet > > controller via PCI bus? > No, this pmd doesn't access any h/w block on the soc. When in ep mode > octeontx and octeontx2 present themselves as network devices and this pmd > will program that interface and does packet rx/tx. > > As far as I can see octeontx2 access the device via PCI bus, why updating > > the existing driver and adding new device IDs is not working? > OxteonTx2 access H/W blocks on soc which also appear as PCI devices.
In other words, - The net/octeontx2 driver has a separate set of HW devices that are not accessible from x86 host. - Even though net/octeontx2 is based on PCI bus, scope of that PCI bus is internal to SoC. It is an internal bus emulated as PCI to help standard device probing works.
