From: viresh.kumar@st.com (viresh kumar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/6] dmaengine/dw_dmac: Enable resubmission from callback routine.
Date: Tue, 19 Apr 2011 12:16:43 +0530 [thread overview]
Message-ID: <4DAD2FD3.5010103@st.com> (raw)
In-Reply-To: <438BB0150E931F4B9CE701519A44630108519E1C1D@bgsmsx502.gar.corp.intel.com>
On 04/19/2011 12:03 PM, Koul, Vinod wrote:
> On 04/19/2011 11:53 AM, viresh kumar wrote:
>> On 04/19/2011 11:42 AM, Koul, Vinod wrote:
>>> On 04/18/2011 04:20 PM, viresh kumar wrote:
>> Vinod,
>>
>> I initiated this discussion few days back on a separate thread:
>>
>> http://www.spinics.net/lists/arm-kernel/msg121139.html
>>
>> And so implemented this.
> Ahhh, on the road, catching up on email...
>
> This was a dma engine requirement, not absolute for slave-dma.
> But would be good idea to resist this. What is your reason for this?
Mainline drivers using dmaengine are already submitting new transfers from
callback routines. For example: amba-pl011.
And i have to use pl011 with DMA, so faced this issue in dw_dmac.
--
viresh
WARNING: multiple messages have this Message-ID (diff)
From: viresh kumar <viresh.kumar@st.com>
To: "Koul, Vinod" <vinod.koul@intel.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Williams, Dan J" <dan.j.williams@intel.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Armando VISCONTI <armando.visconti@st.com>,
Shiraz HASHIM <shiraz.hashim@st.com>, amitgoel <amit.goel@st.com>,
"viresh.linux@gmail.com" <viresh.linux@gmail.com>,
"jamie@jamieiles.com" <jamie@jamieiles.com>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>
Subject: Re: [PATCH 2/6] dmaengine/dw_dmac: Enable resubmission from callback routine.
Date: Tue, 19 Apr 2011 12:16:43 +0530 [thread overview]
Message-ID: <4DAD2FD3.5010103@st.com> (raw)
In-Reply-To: <438BB0150E931F4B9CE701519A44630108519E1C1D@bgsmsx502.gar.corp.intel.com>
On 04/19/2011 12:03 PM, Koul, Vinod wrote:
> On 04/19/2011 11:53 AM, viresh kumar wrote:
>> On 04/19/2011 11:42 AM, Koul, Vinod wrote:
>>> On 04/18/2011 04:20 PM, viresh kumar wrote:
>> Vinod,
>>
>> I initiated this discussion few days back on a separate thread:
>>
>> http://www.spinics.net/lists/arm-kernel/msg121139.html
>>
>> And so implemented this.
> Ahhh, on the road, catching up on email...
>
> This was a dma engine requirement, not absolute for slave-dma.
> But would be good idea to resist this. What is your reason for this?
Mainline drivers using dmaengine are already submitting new transfers from
callback routines. For example: amba-pl011.
And i have to use pl011 with DMA, so faced this issue in dw_dmac.
--
viresh
next prev parent reply other threads:[~2011-04-19 6:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-18 10:49 [PATCH 1/6] dmaengine/dw_dmac: Replace spin_lock_bh with irqsave variants Viresh Kumar
2011-04-18 10:49 ` Viresh Kumar
2011-04-18 10:50 ` [PATCH 2/6] dmaengine/dw_dmac: Enable resubmission from callback routine Viresh Kumar
2011-04-18 10:50 ` Viresh Kumar
2011-04-19 6:12 ` Koul, Vinod
2011-04-19 6:12 ` Koul, Vinod
2011-04-19 6:23 ` viresh kumar
2011-04-19 6:23 ` viresh kumar
2011-04-19 6:33 ` Koul, Vinod
2011-04-19 6:33 ` Koul, Vinod
2011-04-19 6:46 ` viresh kumar [this message]
2011-04-19 6:46 ` viresh kumar
2011-04-26 20:31 ` Russell King - ARM Linux
2011-04-26 20:31 ` Russell King - ARM Linux
2011-04-18 10:50 ` [PATCH 3/6] dmaengine/dw_dmac: call dwc_descriptor_complete from dwc_control with lock held Viresh Kumar
2011-04-18 10:50 ` Viresh Kumar
2011-04-18 10:50 ` [PATCH 4/6] dmaengine/dw_dmac: don't call callback routine in case dmaengine_terminate_all() is called Viresh Kumar
2011-04-18 10:50 ` Viresh Kumar
2011-04-18 10:50 ` [PATCH 5/6] dmaengine/dw_dmac: set residue as total len in dwc_tx_status if status is !DMA_SUCCESS Viresh Kumar
2011-04-18 10:50 ` Viresh Kumar
2011-04-18 10:50 ` [PATCH 6/6] dmaengine/dw_dmac: Divide one sg to many desc, if sg len is greater than DWC_MAX_COUNT Viresh Kumar
2011-04-18 10:50 ` Viresh Kumar
2011-04-19 6:25 ` [PATCH 1/6] dmaengine/dw_dmac: Replace spin_lock_bh with irqsave variants viresh kumar
2011-04-19 6:25 ` viresh kumar
2011-04-26 20:33 ` Russell King - ARM Linux
2011-04-26 20:33 ` Russell King - ARM Linux
2011-04-27 3:47 ` viresh kumar
2011-04-27 3:47 ` viresh kumar
2011-04-27 5:59 ` viresh kumar
2011-04-27 5:59 ` viresh kumar
2011-04-27 7:28 ` Russell King - ARM Linux
2011-04-27 7:28 ` Russell King - ARM Linux
2011-04-26 20:30 ` Russell King - ARM Linux
2011-04-26 20:30 ` Russell King - ARM Linux
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