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From: Guenter Roeck <linux@roeck-us.net>
To: qemu-devel@nongnu.org
Subject: How to tell DMA controller in qemu to terminate transfer ?
Date: Wed, 8 Jan 2020 10:35:53 -0800	[thread overview]
Message-ID: <20200108183553.GA5608@roeck-us.net> (raw)

Hi,

I am trying to fix DMA support with Exynos4210. The original commit
59520dc65e ("hw/arm/exynos4210: Add DMA support for the Exynos4210") doesn't
really work, primarily because it assigns wrong interrupt lines (no idea
how I thought I tested that).

Problem I have right now is that the pl330 peripheral DMA in Exynos4210
depends on a signal from the peripheral device (here: serial ports)
to end a DMA transfer. To make this work, I need a signal from
exynos4210_uart.c to pl330.c to terminate the DMA after the receive
buffer is empty.

How can I implement this in qemu ?

Thanks,
Guenter


             reply	other threads:[~2020-01-08 18:36 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-08 18:35 Guenter Roeck [this message]
2020-01-10 10:36 ` How to tell DMA controller in qemu to terminate transfer ? Peter Maydell
2020-01-10 12:46   ` Guenter Roeck
2020-01-10 18:02   ` Guenter Roeck

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