From: Radhey Shyam Pandey <radheys@xilinx.com>
To: Vinod Koul <vkoul@kernel.org>
Cc: "dan.j.williams@intel.com" <dan.j.williams@intel.com>,
Michal Simek <michals@xilinx.com>,
"nick.graumann@gmail.com" <nick.graumann@gmail.com>,
"andrea.merello@gmail.com" <andrea.merello@gmail.com>,
Appana Durga Kedareswara Rao <appanad@xilinx.com>,
"mcgrof@kernel.org" <mcgrof@kernel.org>,
"dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH -next 3/8] dmaengine: xilinx_dma: Introduce xilinx_dma_get_residue
Date: Fri, 27 Sep 2019 05:16:28 +0000 [thread overview]
Message-ID: <CH2PR02MB700025E26BBC12DA8B7DB6D2C7810@CH2PR02MB7000.namprd02.prod.outlook.com> (raw)
In-Reply-To: <20190926171801.GM3824@vkoul-mobl>
> -----Original Message-----
> From: Vinod Koul <vkoul@kernel.org>
> Sent: Thursday, September 26, 2019 10:48 PM
> To: Radhey Shyam Pandey <radheys@xilinx.com>
> Cc: dan.j.williams@intel.com; Michal Simek <michals@xilinx.com>;
> nick.graumann@gmail.com; andrea.merello@gmail.com; Appana Durga
> Kedareswara Rao <appanad@xilinx.com>; mcgrof@kernel.org;
> dmaengine@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH -next 3/8] dmaengine: xilinx_dma: Introduce
> xilinx_dma_get_residue
>
> On 26-09-19, 05:52, Radhey Shyam Pandey wrote:
>
> > > > + * VDMA and simple mode do not support residue reporting, so the
> > > > + * residue field will always be 0.
> > > > + */
> > > > + if (chan->xdev->dma_config->dmatype == XDMA_TYPE_VDMA ||
> > > !chan->has_sg)
> > > > + return residue;
> > >
> > > why not check this in status callback?
> > Assuming we mean to move vdma and non-sg check to
> xilinx_dma_tx_status.
> > Just a thought- Keeping this check in xilinx_dma_get_residue provides
> > an abstraction and caller can simply call this func with knowing about
> > IP config specific residue calculation. Considering this point does it
> > looks ok ?
>
> well you are checking either way, so calling the lower level function
> only when you need it makes more sense!
Sure, will do it in v2.
>
> --
> ~Vinod
next prev parent reply other threads:[~2019-09-27 5:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 16:36 [PATCH -next 0/8] AXI DMA driver improvements Radhey Shyam Pandey
2019-09-05 16:36 ` [PATCH -next 1/8] dmaengine: xilinx_dma: Remove desc_callback_valid check Radhey Shyam Pandey
2019-09-05 16:36 ` [PATCH -next 2/8] dmaengine: xilinx_dma: Merge get_callback and _invoke Radhey Shyam Pandey
2019-09-05 16:36 ` [PATCH -next 3/8] dmaengine: xilinx_dma: Introduce xilinx_dma_get_residue Radhey Shyam Pandey
2019-09-25 21:01 ` Vinod Koul
2019-09-26 5:52 ` Radhey Shyam Pandey
2019-09-26 17:18 ` Vinod Koul
2019-09-27 5:16 ` Radhey Shyam Pandey [this message]
2019-10-01 12:03 ` Radhey Shyam Pandey
2019-09-05 16:37 ` [PATCH -next 4/8] dmaengine: xilinx_dma: Add callback_result support Radhey Shyam Pandey
2019-09-05 16:37 ` [PATCH -next 5/8] dmaengine: xilinx_dma: Remove residue from channel data Radhey Shyam Pandey
2019-09-05 16:37 ` [PATCH -next 6/8] dmaengine: xilinx_dma: Print debug message when no free tx segments Radhey Shyam Pandey
2019-09-05 16:37 ` [PATCH -next 7/8] dmaengine: xilinx_dma: Check for both idle and halted state in axidma stop_transfer Radhey Shyam Pandey
2019-09-26 17:21 ` Vinod Koul
2019-09-27 6:48 ` Radhey Shyam Pandey
2019-09-27 13:57 ` Nicholas Graumann
2019-09-27 16:53 ` Radhey Shyam Pandey
2019-09-05 16:37 ` [PATCH -next 8/8] dmaengine: xilinx_dma: Clear desc_pendingcount in xilinx_dma_reset Radhey Shyam Pandey
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