From mboxrd@z Thu Jan 1 00:00:00 1970 From: Federico Vaga Subject: Re: IOMMU - DMA debugging Date: Fri, 11 Aug 2017 11:35:35 +0200 Message-ID: <2354060.VDW3kf4Bxo@harkonnen> References: <1807773.bRUB8Ke59R@harkonnen> <9273b2ab-2648-63f7-fe0f-a4462b4e4062@arm.com> <22729074.Vd8Fat30YZ@harkonnen> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <22729074.Vd8Fat30YZ@harkonnen> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Robin Murphy Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: iommu@lists.linux-foundation.org Hello, just to conclude this issue On Thursday, July 13, 2017 10:43:27 AM CEST Federico Vaga wrote: > On Wednesday, July 12, 2017 8:02:42 PM CEST Robin Murphy wrote: > [...] > > or alternatively the hardware itself is going wrong somehow (e.g. trying > > to read a buffer address from an in-memory descriptor, getting back > > junk, and going downhill from there). > > Probably it worth to have a look there It was an hardware problem it has been fixed. Now the DMA works with and without IOMMU. Thank you again -- Federico Vaga http://www.federicovaga.it/