From: Sascha Hauer <s.hauer@pengutronix.de> To: Dan Williams <dan.j.williams@intel.com> Cc: linux-kernel@vger.kernel.org, Linus Walleij <linus.ml.walleij@gmail.com>, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/3] dmaengine: add wrapper functions for dmaengine Date: Fri, 24 Sep 2010 09:25:23 +0200 [thread overview] Message-ID: <20100924072523.GM23406@pengutronix.de> (raw) In-Reply-To: <AANLkTin8v_29HESnmhE5==3OLmb29bmoOY1iona4C+eD@mail.gmail.com> Hi Dan, On Thu, Sep 23, 2010 at 12:53:58PM -0700, Dan Williams wrote: > > diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h > > index 0df7864..635c60b 100644 > > --- a/include/linux/dmaengine.h > > +++ b/include/linux/dmaengine.h > > @@ -491,6 +491,47 @@ struct dma_device { > > void (*device_issue_pending)(struct dma_chan *chan); > > }; > > > > +static inline int dmaengine_device_control(struct dma_chan *chan, > > + enum dma_ctrl_cmd cmd, > > + unsigned long arg) > > +{ > > + return chan->device->device_control(chan, cmd, arg); > > +} > > + > > +static inline int dmaengine_slave_config(struct dma_chan *chan, > > + struct dma_slave_config *config) > > +{ > > + return dmaengine_device_control(chan, DMA_SLAVE_CONFIG, > > + (unsigned long)config); > > +} > > + > > +static inline int dmaengine_terminate_all(struct dma_chan *chan) > > +{ > > + return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0); > > +} > > + > > +static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg( > > + struct dma_chan *chan, struct scatterlist *sgl, > > + unsigned int sg_len, enum dma_data_direction direction, > > + unsigned long flags) > > +{ > > + return chan->device->device_prep_slave_sg(chan, sgl, sg_len, direction, > > + flags); > > +} > > + > > +static inline struct dma_async_tx_descriptor *dmaengine_prep_cyclic( > > + struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, > > + size_t period_len, enum dma_data_direction direction) > > +{ > > + return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len, > > + period_len, direction); > > +} > > + > > No strong disagreements on the above, the type safety of > dmaengine_slave_config() is nice. So you have only small disagreements? ;) I can drop the dmaengine_prep_* functions and only keep the device_control functions if like it better. > > > +static inline int dmaengine_tx_submit(struct dma_async_tx_descriptor *desc) > > +{ > > + return desc->tx_submit(desc); > > +} > > This one can drop the tx. You mean the function should be named dmaengine_submit? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
WARNING: multiple messages have this Message-ID (diff)
From: s.hauer@pengutronix.de (Sascha Hauer) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/3] dmaengine: add wrapper functions for dmaengine Date: Fri, 24 Sep 2010 09:25:23 +0200 [thread overview] Message-ID: <20100924072523.GM23406@pengutronix.de> (raw) In-Reply-To: <AANLkTin8v_29HESnmhE5==3OLmb29bmoOY1iona4C+eD@mail.gmail.com> Hi Dan, On Thu, Sep 23, 2010 at 12:53:58PM -0700, Dan Williams wrote: > > diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h > > index 0df7864..635c60b 100644 > > --- a/include/linux/dmaengine.h > > +++ b/include/linux/dmaengine.h > > @@ -491,6 +491,47 @@ struct dma_device { > > ? ? ? ?void (*device_issue_pending)(struct dma_chan *chan); > > ?}; > > > > +static inline int dmaengine_device_control(struct dma_chan *chan, > > + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?enum dma_ctrl_cmd cmd, > > + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?unsigned long arg) > > +{ > > + ? ? ? return chan->device->device_control(chan, cmd, arg); > > +} > > + > > +static inline int dmaengine_slave_config(struct dma_chan *chan, > > + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? struct dma_slave_config *config) > > +{ > > + ? ? ? return dmaengine_device_control(chan, DMA_SLAVE_CONFIG, > > + ? ? ? ? ? ? ? ? ? ? ? (unsigned long)config); > > +} > > + > > +static inline int dmaengine_terminate_all(struct dma_chan *chan) > > +{ > > + ? ? ? return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0); > > +} > > + > > +static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg( > > + ? ? ? ? ? ? ? struct dma_chan *chan, struct scatterlist *sgl, > > + ? ? ? ? ? ? ? unsigned int sg_len, enum dma_data_direction direction, > > + ? ? ? ? ? ? ? unsigned long flags) > > +{ > > + ? ? ? return chan->device->device_prep_slave_sg(chan, sgl, sg_len, direction, > > + ? ? ? ? ? ? ? ? ? ? ? flags); > > +} > > + > > +static inline struct dma_async_tx_descriptor *dmaengine_prep_cyclic( > > + ? ? ? ? ? ? ? struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, > > + ? ? ? ? ? ? ? size_t period_len, enum dma_data_direction direction) > > +{ > > + ? ? ? return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len, > > + ? ? ? ? ? ? ? ? ? ? ? period_len, direction); > > +} > > + > > No strong disagreements on the above, the type safety of > dmaengine_slave_config() is nice. So you have only small disagreements? ;) I can drop the dmaengine_prep_* functions and only keep the device_control functions if like it better. > > > +static inline int dmaengine_tx_submit(struct dma_async_tx_descriptor *desc) > > +{ > > + ? ? ? return desc->tx_submit(desc); > > +} > > This one can drop the tx. You mean the function should be named dmaengine_submit? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
next prev parent reply other threads:[~2010-09-24 7:25 UTC|newest] Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-08-16 11:07 [RFC] dmaengine: assorted patches and Freescale SDMA support Sascha Hauer 2010-08-16 11:07 ` Sascha Hauer 2010-08-16 11:07 ` [PATCH 1/3] dmaengine: add possibility for cyclic transfers Sascha Hauer 2010-08-16 11:07 ` Sascha Hauer 2010-08-16 11:56 ` Lothar Waßmann 2010-08-16 11:56 ` Lothar Waßmann 2010-08-16 12:27 ` Linus Walleij 2010-08-16 12:27 ` Linus Walleij 2010-08-16 12:32 ` Sascha Hauer 2010-08-16 12:32 ` Sascha Hauer 2010-08-16 12:22 ` Linus Walleij 2010-08-16 12:22 ` Linus Walleij 2010-09-20 13:01 ` Sascha Hauer 2010-09-20 13:01 ` Sascha Hauer 2010-09-23 19:42 ` Dan Williams 2010-09-23 19:42 ` Dan Williams 2010-09-24 7:25 ` Sascha Hauer 2010-09-24 7:25 ` Sascha Hauer 2010-08-16 11:07 ` [PATCH 2/3] dmaengine: add wrapper functions for dmaengine Sascha Hauer 2010-08-16 11:07 ` Sascha Hauer 2010-08-23 7:17 ` Sascha Hauer 2010-08-23 7:17 ` Sascha Hauer 2010-09-20 13:02 ` Sascha Hauer 2010-09-23 19:53 ` Dan Williams 2010-09-23 19:53 ` Dan Williams 2010-09-24 7:25 ` Sascha Hauer [this message] 2010-09-24 7:25 ` Sascha Hauer 2010-09-24 15:45 ` Dan Williams 2010-09-24 15:45 ` Dan Williams 2010-08-16 11:07 ` [PATCH 3/3] dmaengine: Add Freescale i.MX SDMA support Sascha Hauer 2010-08-16 11:07 ` Sascha Hauer 2010-08-16 12:21 ` Linus Walleij 2010-08-16 12:21 ` Linus Walleij 2010-08-16 14:15 ` Sascha Hauer 2010-08-16 14:15 ` Sascha Hauer 2010-08-17 4:36 ` Baruch Siach 2010-08-17 4:36 ` Baruch Siach 2010-08-17 6:47 ` Sascha Hauer 2010-08-17 6:47 ` Sascha Hauer 2010-08-18 3:49 ` Alexei Babich 2010-08-18 4:41 ` Baruch Siach 2010-08-18 11:17 ` Philippe Rétornaz 2010-08-18 11:17 ` Philippe Rétornaz 2010-08-24 7:10 ` [PATCH 3/3 v3] " Sascha Hauer 2010-08-24 7:10 ` Sascha Hauer 2010-09-02 14:06 ` [PATCH 3/3] " Russell King - ARM Linux 2010-09-02 14:06 ` Russell King - ARM Linux 2010-08-23 12:57 ` [PATCH 3/3 v2] " Sascha Hauer 2010-08-23 12:57 ` Sascha Hauer 2010-08-23 17:30 ` Linus Walleij 2010-08-23 17:30 ` Linus Walleij 2010-08-24 6:58 ` Sascha Hauer 2010-08-24 6:58 ` Sascha Hauer 2010-08-23 17:48 ` Uwe Kleine-König 2010-08-23 17:48 ` Uwe Kleine-König 2010-08-28 15:18 ` Linus Walleij 2010-08-28 15:18 ` Linus Walleij 2010-08-28 15:27 ` Marek Vasut 2010-08-28 15:27 ` Marek Vasut 2010-08-28 16:18 ` Sascha Hauer 2010-08-28 16:18 ` Sascha Hauer 2010-08-28 16:30 ` Marek Vasut 2010-08-28 16:30 ` Marek Vasut 2010-08-28 17:20 ` Sascha Hauer 2010-08-28 17:20 ` Sascha Hauer 2010-09-02 11:20 ` Russell King - ARM Linux 2010-09-02 11:20 ` Russell King - ARM Linux 2010-08-29 12:35 ` Linus Walleij 2010-08-29 12:35 ` Linus Walleij 2010-08-30 12:55 ` Sascha Hauer 2010-08-30 12:55 ` Sascha Hauer 2010-08-24 7:58 ` Lothar Waßmann 2010-08-24 7:58 ` Lothar Waßmann 2010-08-24 15:01 ` Linus Walleij 2010-08-24 15:01 ` Linus Walleij 2010-08-27 12:22 ` [PATCH 3/3 v3] " Sascha Hauer 2010-08-27 12:22 ` Sascha Hauer 2010-08-29 21:46 ` Marc Reilly
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