From: Vinod Koul <vkoul@kernel.org>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: robh+dt@kernel.org, dan.j.williams@intel.com,
dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-omap@vger.kernel.org
Subject: Re: [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes
Date: Wed, 4 Sep 2019 15:19:56 +0530 [thread overview]
Message-ID: <20190904094956.GT2672@vkoul-mobl> (raw)
In-Reply-To: <20190823125618.8133-1-peter.ujfalusi@ti.com>
On 23-08-19, 15:56, Peter Ujfalusi wrote:
> Hi,
>
> When other cores want to use EDMA for their use cases Linux was not playing
> nicely.
> By design EDMA is supporting shared use with shadow regions. Linux is using
> region0, others can be used by other cores.
>
> In order to not break multicore shared usage of EDMA:
> - do not reset paRAM slots which is not allocated for Linux (reserved paRAM
> slots)
> - Only reset region0 access registers, do not touch other regions
> - Add option for reserved channels which should not be used by Linux in a similar
> fashion as we already have for reserved paRAM slots.
Applied 1 to 3, thanks
--
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vkoul@kernel.org>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
robh+dt@kernel.org, dmaengine@vger.kernel.org,
dan.j.williams@intel.com, linux-omap@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes
Date: Wed, 4 Sep 2019 15:19:56 +0530 [thread overview]
Message-ID: <20190904094956.GT2672@vkoul-mobl> (raw)
In-Reply-To: <20190823125618.8133-1-peter.ujfalusi@ti.com>
On 23-08-19, 15:56, Peter Ujfalusi wrote:
> Hi,
>
> When other cores want to use EDMA for their use cases Linux was not playing
> nicely.
> By design EDMA is supporting shared use with shadow regions. Linux is using
> region0, others can be used by other cores.
>
> In order to not break multicore shared usage of EDMA:
> - do not reset paRAM slots which is not allocated for Linux (reserved paRAM
> slots)
> - Only reset region0 access registers, do not touch other regions
> - Add option for reserved channels which should not be used by Linux in a similar
> fashion as we already have for reserved paRAM slots.
Applied 1 to 3, thanks
--
~Vinod
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next prev parent reply other threads:[~2019-09-04 9:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 12:56 [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` [PATCH 1/5] dmaengine: ti: edma: Do not reset reserved paRAM slots Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` [PATCH 2/5] dmaengine: ti: edma: Only reset region0 access registers Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` [PATCH 3/5] dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits() Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` [PATCH 4/5] dt-bindings: dma: ti-edma: Add option for reserved channel ranges Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-29 22:47 ` Rob Herring
2019-08-29 22:47 ` Rob Herring
2019-08-30 5:37 ` Peter Ujfalusi
2019-08-30 5:37 ` Peter Ujfalusi
2019-08-30 5:37 ` Peter Ujfalusi
2019-09-03 10:19 ` Peter Ujfalusi
2019-09-03 10:19 ` Peter Ujfalusi
2019-09-03 10:19 ` Peter Ujfalusi
2019-09-06 13:10 ` Rob Herring
2019-09-06 13:10 ` Rob Herring
2019-09-06 13:10 ` Rob Herring
2019-08-23 12:56 ` [PATCH 5/5] dmaengine: ti: edma: Add support for handling reserved channels Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-08-23 12:56 ` Peter Ujfalusi
2019-09-04 9:49 ` Vinod Koul [this message]
2019-09-04 9:49 ` [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes Vinod Koul
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