From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sinan Kaya Subject: Re: [PATCH V12 3/7] dma: add Qualcomm Technologies HIDMA management driver Date: Fri, 15 Jan 2016 17:47:52 -0500 Message-ID: <56997718.70707@codeaurora.org> References: <1452523550-8920-1-git-send-email-okaya@codeaurora.org> <1452523550-8920-4-git-send-email-okaya@codeaurora.org> <20160115145629.GI3262@leverpostej> <56990C40.4050407@codeaurora.org> <20160115152257.GK3262@leverpostej> <56992987.5080603@codeaurora.org> <56992D16.6070800@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <56992D16.6070800@arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: Marc Zyngier , Mark Rutland Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, arnd@arndb.de, vinod.koul@intel.com, jcm@redhat.com, timur@codeaurora.org, linux-kernel@vger.kernel.org, agross@codeaurora.org, dmaengine@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-arm-msm@vger.kernel.org List-Id: devicetree@vger.kernel.org On 1/15/2016 12:32 PM, Marc Zyngier wrote: >>> Do you have a link to that? Seeing it would help to ease my concerns. >> > >> > The QEMU driver has not been posted yet. As far as I know, it just discovers the memory >> > resources on the platform object and creates mappings for the guest machine only. >> > >> > Shanker Donthineni and Vikram Sethi will post the QEMU patch later. > Then may I suggest you both synchronize your submissions? I'd really > like to hear from the QEMU maintainers that they are satisfied with that > side of the story as well. The HIDMA QEMU driver is also based on VFIO platform driver in QEMU. It is not a new concept or new framework. All tried and tested solutions. The driver below is already using this feature. HIDMA is no exception. I have verified functionality of HIDMA linux driver with HIDMA QEMU driver already. https://lxr.missinglinkelectronics.com/qemu/hw/arm/sysbus-fdt.c#L67 https://lxr.missinglinkelectronics.com/qemu/hw/vfio/calxeda-xgmac.c#L18 https://lxr.missinglinkelectronics.com/qemu/include/hw/vfio/vfio-calxeda-xgmac.h -- Sinan Kaya Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project