[dpdk-dev] [PATCH] nfp: avoiding concurrency when hardware reconfig

[Alejandro Lucero]

Hi Bruce,

Sorry about this. I sent a v2 for this patch but not in the same thread:

http://www.dpdk.org/ml/archives/dev/2016-April/037996.html

On Tue, May 3, 2016 at 12:01 PM, Bruce Richardson <
bruce.richardson at intel.com> wrote:

> On Tue, Apr 26, 2016 at 01:14:15PM +0100, Alejandro Lucero wrote:
> > Some apps calling some functions from different threads at the
> > same time could lead to reconfig problems. Reconfig mechanism is
> > based on a hardware queue where incrementing a counter signals the
> > firmware to do the reconfig. If there are two increments before the
> > first one has been processed the firmware will stop and a device
> > reset is necessary.
> >
> > Signed-off-by: Alejandro Lucero <alejandro.lucero at netronome.com>
> > ---
> >  drivers/net/nfp/nfp_net.c     | 8 ++++++++
> >  drivers/net/nfp/nfp_net_pmd.h | 1 +
> >  2 files changed, 9 insertions(+)
> >
> > diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
> > index bc0a3d8..ba0ee04 100644
> > --- a/drivers/net/nfp/nfp_net.c
> > +++ b/drivers/net/nfp/nfp_net.c
> > @@ -58,6 +58,7 @@
> >  #include "nfp_net_pmd.h"
> >  #include "nfp_net_logs.h"
> >  #include "nfp_net_ctrl.h"
> > +#include <rte_spinlock.h>
>
> Hi Alejandro,
>
> I think this header addition is in the wrong place in the code. When I
> apply
> this patch to next-net and try a recompile I get the error:
>
>   CC nfp_net.o
>   In file included from
> /home/bruce/next-net/dpdk-next-net/drivers/net/nfp/nfp_net.c:58:0:
>   /home/bruce/next-net/dpdk-next-net/drivers/net/nfp/nfp_net_pmd.h:409:2:
> error: unknown type name ‘rte_spinlock_t’
>     rte_spinlock_t reconfig_lock;
>     ^
>
> You either need to put the spinlock include before the nfp_net_pmd.h
> include
> or, perhaps better, put the spinlock include inside the nfp_net_pmd header
> file
> since that is where the spinlock variable is being defined.
>
> /Bruce
>
>