netdev - RE: [PATCH v3 net 1/2] dpaa2-eth: add irq for the dpmac connect/disconnect event

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Date:   Wed, 16 Oct 2019 11:10:56 +0000
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     Simon Horman <simon.horman@...ronome.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>
Subject: RE: [PATCH v3 net 1/2] dpaa2-eth: add irq for the dpmac
 connect/disconnect event

> Subject: Re: [PATCH v3 net 1/2] dpaa2-eth: add irq for the dpmac
> connect/disconnect event
> 
> On Wed, Oct 16, 2019 at 10:36:22AM +0300, Ioana Ciornei wrote:
> > From: Florin Chiculita <florinlaurentiu.chiculita@....com>
> >
> > Add IRQ for the DPNI endpoint change event, resolving the issue when a
> > dynamically created DPNI gets a randomly generated hw address when the
> > endpoint is a DPMAC object.
> >
> > Signed-off-by: Florin Chiculita <florinlaurentiu.chiculita@....com>
> > Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
> > ---
> > Changes in v2:
> >  - none
> > Changes in v3:
> >  - none
> >
> >  drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c | 6 +++++-
> >  drivers/net/ethernet/freescale/dpaa2/dpni.h      | 5 ++++-
> >  2 files changed, 9 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
> > b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
> > index 162d7d8fb295..5acd734a216b 100644
> > --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
> > +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
> > @@ -3306,6 +3306,9 @@ static irqreturn_t dpni_irq0_handler_thread(int
> irq_num, void *arg)
> >  	if (status & DPNI_IRQ_EVENT_LINK_CHANGED)
> >  		link_state_update(netdev_priv(net_dev));
> >
> > +	if (status & DPNI_IRQ_EVENT_ENDPOINT_CHANGED)
> > +		set_mac_addr(netdev_priv(net_dev));
> > +
> >  	return IRQ_HANDLED;
> >  }
> >
> > @@ -3331,7 +3334,8 @@ static int setup_irqs(struct fsl_mc_device *ls_dev)
> >  	}
> >
> >  	err = dpni_set_irq_mask(ls_dev->mc_io, 0, ls_dev->mc_handle,
> > -				DPNI_IRQ_INDEX,
> DPNI_IRQ_EVENT_LINK_CHANGED);
> > +				DPNI_IRQ_INDEX,
> DPNI_IRQ_EVENT_LINK_CHANGED |
> > +				DPNI_IRQ_EVENT_ENDPOINT_CHANGED);
> >  	if (err < 0) {
> >  		dev_err(&ls_dev->dev, "dpni_set_irq_mask(): %d\n", err);
> >  		goto free_irq;
> > diff --git a/drivers/net/ethernet/freescale/dpaa2/dpni.h
> > b/drivers/net/ethernet/freescale/dpaa2/dpni.h
> > index fd583911b6c0..ee0711d06b3a 100644
> > --- a/drivers/net/ethernet/freescale/dpaa2/dpni.h
> > +++ b/drivers/net/ethernet/freescale/dpaa2/dpni.h
> > @@ -133,9 +133,12 @@ int dpni_reset(struct fsl_mc_io	*mc_io,
> >   */
> >  #define DPNI_IRQ_INDEX				0
> >  /**
> > - * IRQ event - indicates a change in link state
> > + * IRQ events:
> > + *       indicates a change in link state
> > + *       indicates a change in endpoint
> >   */
> >  #define DPNI_IRQ_EVENT_LINK_CHANGED		0x00000001
> > +#define DPNI_IRQ_EVENT_ENDPOINT_CHANGED		0x00000002
> 
> Perhaps (as a follow-up?) this is a candidate for using the BIT() macro.
> 

I wouldn't add another change to this patch set (targeting the net) but definitely will change this in net-next.

Thanks a lot,
Ioana

> >
> >  int dpni_set_irq_enable(struct fsl_mc_io	*mc_io,
> >  			u32			cmd_flags,
> > --
> > 1.9.1
> >