* [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB
@ 2012-06-11 3:58 Kuninori Morimoto
2012-06-12 1:29 ` Simon Horman
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Kuninori Morimoto @ 2012-06-11 3:58 UTC (permalink / raw)
To: linux-sh
It is possible to reduce CPU load if USB used DMAEngine.
This patch enabled it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
arch/arm/mach-shmobile/board-armadillo800eva.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-shmobile/board-armadillo800eva.c b/arch/arm/mach-shmobile/board-armadillo800eva.c
index 3413eae..90f4056 100644
--- a/arch/arm/mach-shmobile/board-armadillo800eva.c
+++ b/arch/arm/mach-shmobile/board-armadillo800eva.c
@@ -283,6 +283,8 @@ static struct usbhsf_private usbhsf_private = {
.driver_param = {
.buswait_bwait = 5,
.detection_delay = 5,
+ .d0_rx_id = SHDMA_SLAVE_USBHS_RX,
+ .d1_tx_id = SHDMA_SLAVE_USBHS_TX,
},
}
};
--
1.7.5.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB
2012-06-11 3:58 [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB Kuninori Morimoto
@ 2012-06-12 1:29 ` Simon Horman
2012-06-12 1:35 ` Kuninori Morimoto
2012-06-12 2:07 ` Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Simon Horman @ 2012-06-12 1:29 UTC (permalink / raw)
To: linux-sh
On Sun, Jun 10, 2012 at 08:58:23PM -0700, Kuninori Morimoto wrote:
> It is possible to reduce CPU load if USB used DMAEngine.
> This patch enabled it.
Hi Morimoto-san,
I am having a little trouble exercising this.
Could you propose a test scenario?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB
2012-06-11 3:58 [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB Kuninori Morimoto
2012-06-12 1:29 ` Simon Horman
@ 2012-06-12 1:35 ` Kuninori Morimoto
2012-06-12 2:07 ` Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Kuninori Morimoto @ 2012-06-12 1:35 UTC (permalink / raw)
To: linux-sh
Hi Simon
> > It is possible to reduce CPU load if USB used DMAEngine.
> > This patch enabled it.
>
> Hi Morimoto-san,
>
> I am having a little trouble exercising this.
> Could you propose a test scenario?
How about to use g_mass_storage.ko ?
insmod g_mass_storage.ko file=xxxx
and read/write it
dma3 will be used
Best regards
---
Kuninori Morimoto
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB
2012-06-11 3:58 [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB Kuninori Morimoto
2012-06-12 1:29 ` Simon Horman
2012-06-12 1:35 ` Kuninori Morimoto
@ 2012-06-12 2:07 ` Simon Horman
2 siblings, 0 replies; 4+ messages in thread
From: Simon Horman @ 2012-06-12 2:07 UTC (permalink / raw)
To: linux-sh
On Mon, Jun 11, 2012 at 06:35:58PM -0700, Kuninori Morimoto wrote:
>
> Hi Simon
>
> > > It is possible to reduce CPU load if USB used DMAEngine.
> > > This patch enabled it.
> >
> > Hi Morimoto-san,
> >
> > I am having a little trouble exercising this.
> > Could you propose a test scenario?
>
> How about to use g_mass_storage.ko ?
>
> insmod g_mass_storage.ko file=xxxx
> and read/write it
>
> dma3 will be used
Thanks.
Tested-by: Simon Horman <horms@verge.net.au>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-06-12 2:07 UTC | newest]
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2012-06-11 3:58 [PATCH 23/27] ARM: shmobile: armadillo800eva: enable DMAEngine on USB Kuninori Morimoto
2012-06-12 1:29 ` Simon Horman
2012-06-12 1:35 ` Kuninori Morimoto
2012-06-12 2:07 ` Simon Horman
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