linux-kernel - Re: [PATCH 6/8] async_tx: adding mult and sum

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Date:	Wed, 13 May 2015 10:45:27 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Andrew Lunn <andrew@...n.ch>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Jason Cooper <jason@...edaemon.net>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	Lior Amsalem <alior@...vell.com>,
	Thomas Petazzoni <thomas@...e-electrons.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 6/8] async_tx: adding mult and sum_product flags

On Tue, May 12, 2015 at 06:05:35PM +0200, Andrew Lunn wrote:
> On Tue, May 12, 2015 at 05:37:41PM +0200, Maxime Ripard wrote:
> > From: Lior Amsalem <alior@...vell.com>
> > 
> > Some engines (like Marvell mv_xor) do not support mult and sum_product
> > operations as part of the pq support.
> > 
> > This patch adds new flags: DMA_PREP_PQ_MULT & DMA_PREP_PQ_SUM_PRODUCT these
> > flags helps the driver identify such operations.
> > 
> > Signed-off-by: Lior Amsalem <alior@...vell.com>
> > Reviewed-by: Ofer Heifetz <oferh@...vell.com>
> > Reviewed-by: Nadav Haklai <nadavh@...vell.com>
> > Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
> > ---
> >  crypto/async_tx/async_raid6_recov.c | 4 ++--
> >  include/linux/dmaengine.h           | 4 ++++
> >  2 files changed, 6 insertions(+), 2 deletions(-)
> > 
> > diff --git a/crypto/async_tx/async_raid6_recov.c b/crypto/async_tx/async_raid6_recov.c
> > index 934a84981495..2db5486fd873 100644
> > --- a/crypto/async_tx/async_raid6_recov.c
> > +++ b/crypto/async_tx/async_raid6_recov.c
> > @@ -47,7 +47,7 @@ async_sum_product(struct page *dest, struct page **srcs, unsigned char *coef,
> >  		struct device *dev = dma->dev;
> >  		dma_addr_t pq[2];
> >  		struct dma_async_tx_descriptor *tx;
> > -		enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
> > +		enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P | DMA_PREP_PQ_SUM_PRODUCT;
> >  
> >  		if (submit->flags & ASYNC_TX_FENCE)
> >  			dma_flags |= DMA_PREP_FENCE;
> > @@ -111,7 +111,7 @@ async_mult(struct page *dest, struct page *src, u8 coef, size_t len,
> >  		dma_addr_t dma_dest[2];
> >  		struct device *dev = dma->dev;
> >  		struct dma_async_tx_descriptor *tx;
> > -		enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
> > +		enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P | DMA_PREP_PQ_MULT;
> >  
> >  		if (submit->flags & ASYNC_TX_FENCE)
> >  			dma_flags |= DMA_PREP_FENCE;
> > diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> > index ad419757241f..f19ecebb4d3f 100644
> > --- a/include/linux/dmaengine.h
> > +++ b/include/linux/dmaengine.h
> > @@ -174,6 +174,8 @@ struct dma_interleaved_template {
> >   *  operation it continues the calculation with new sources
> >   * @DMA_PREP_FENCE - tell the driver that subsequent operations depend
> >   *  on the result of this operation
> > + * @DMA_PREP_PQ_MULT - tell the driver that this is a mult request
> > + * @DMA_PREP_PQ_SUM_PRODUCT - tell the driver that this is a sum product request
> >   */
> >  enum dma_ctrl_flags {
> >  	DMA_PREP_INTERRUPT = (1 << 0),
> > @@ -182,6 +184,8 @@ enum dma_ctrl_flags {
> >  	DMA_PREP_PQ_DISABLE_Q = (1 << 3),
> >  	DMA_PREP_CONTINUE = (1 << 4),
> >  	DMA_PREP_FENCE = (1 << 5),
> > +	DMA_PREP_PQ_MULT = (1 << 10),
> > +	DMA_PREP_PQ_SUM_PRODUCT = (1 << 11),

None. I just forgot to change this. Thanks!

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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