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From: Vinod Koul <vkoul@kernel.org>
To: Federico Vaga <federico.vaga@cern.ch>
Cc: Dan Williams <dan.j.williams@intel.com>,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: DMA Engine: Transfer From Userspace
Date: Mon, 22 Jun 2020 15:12:09 +0530	[thread overview]
Message-ID: <20200622094209.GH2324254@vkoul-mobl> (raw)
In-Reply-To: <20200622092553.pvspklv5suu6rm7w@cwe-513-vol689.cern.ch>

On 22-06-20, 11:25, Federico Vaga wrote:
> On Sat, Jun 20, 2020 at 12:47:16AM +0200, Federico Vaga wrote:
> > Hello,
> > 
> > is there the possibility of using a DMA engine channel from userspace?
> > 
> > Something like:
> > - configure DMA using ioctl() (or whatever configuration mechanism)
> > - read() or write() to trigger the transfer
> 
> Let me add one more question related to my case. The dmatest module does not
> perform tests on SLAVEs. why?

For slaves, we need some driver to do the peripheral configuration,
dmatest cannot do that and is suited for memcpy operations

Thanks
-- 
~Vinod

      reply	other threads:[~2020-06-22  9:42 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-19 22:47 DMA Engine: Transfer From Userspace Federico Vaga
2020-06-19 23:31 ` Dave Jiang
2020-06-21  7:24   ` Vinod Koul
2020-06-21 20:36     ` Federico Vaga
2020-06-21 20:45       ` Richard Weinberger
2020-06-21 22:32         ` Federico Vaga
2020-06-22  4:47       ` Vinod Koul
2020-06-22  6:57         ` Federico Vaga
2020-06-22 12:01         ` Thomas Ruf
2020-06-22 12:27           ` Richard Weinberger
2020-06-22 14:01             ` Thomas Ruf
2020-06-22 12:30           ` Federico Vaga
2020-06-22 14:03             ` Thomas Ruf
2020-06-22 15:54           ` Vinod Koul
2020-06-22 16:34             ` Thomas Ruf
2020-06-24  9:30               ` Thomas Ruf
2020-06-24  9:38                 ` Vinod Koul
2020-06-24 12:07                   ` Peter Ujfalusi
2020-06-24 13:58                     ` Thomas Ruf
2020-06-26 10:29                       ` Peter Ujfalusi
2020-06-29 15:18                         ` Thomas Ruf
2020-06-30 12:31                           ` Peter Ujfalusi
2020-07-01 16:13                             ` Thomas Ruf
2020-06-25  0:42     ` Dave Jiang
2020-06-25  8:11       ` Thomas Ruf
2020-06-26 20:08         ` Ira Weiny
2020-06-29 15:31           ` Thomas Ruf
2020-06-22  9:25 ` Federico Vaga
2020-06-22  9:42   ` Vinod Koul [this message]

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