On 18/10/2018 09:02, Peter Ujfalusi wrote: > > > On 2018-10-17 14:42, Gustavo Pimentel wrote: >> Hi all, > > Fixed up the email addresses.. > >> I'm implementing a new DMA driver for an IP and I've used /drivers/dma/dw/* >> driver has reference. This driver uses DMA engine framework. >> >> Now I would like to start testing my new driver by using DMAtest tool, I've >> follow the instructions written on [1], but I don't get any output from it. >> I think DMAtest didn't even started... Can you help to track down this? > > Do you have support for DMA_MEM_TO_MEM and implementation for the > device_prep_dma_memcpy callback? > > If yes, then add debug to your device_prep_dma_memcpy first to see if it > goes well, then to your device_issue_pending and device_tx_status callbacks. Unfortunately I don't have it. I only have support for DMA_DEV_TO_MEM and DMA_MEM_TO_DEV. I've activated CONFIG_DYNAMIC_DEBUG flag on kernel and executed the following command after loading the driver. % echo 'file dmatest.c line 1- +pfl' > /sys/kernel/debug/dynamic_debug/control But no changes... > >> These were the commands that I execute for the test. >> >> % uname -a >> Linux axs101 4.19.0-rc1 #355 PREEMPT Mon Oct 15 11:56:03 CEST 2018 arc GNU/Linux >> >> % ls -1 /sys/class/dma/ >> dma0chan0 >> dma0chan1 >> dma1chan0 >> dma1chan1 >> >> % echo dma0chan0 > /sys/module/dmatest/parameters/channel >> % echo 1 > /sys/module/dmatest/parameters/iterations >> % echo 2000 > /sys/module/dmatest/parameters/timeout >> % echo 1 > /sys/module/dmatest/parameters/verbose >> % echo 1 > /sys/module/dmatest/parameters/run >> >> % cat /sys/module/dmatest/parameters/run >> % N >> >> [1] https://urldefense.proofpoint.com/v2/url?u=https-3A__www.kernel.org_doc_html_v4.15_driver-2Dapi_dmaengine_dmatest.html&d=DwIDaQ&c=DPL6_X_6JkXFx7AXWqB0tg&r=bkWxpLoW-f-E3EdiDCCa0_h0PicsViasSlvIpzZvPxs&m=gwp-v4gqH7sPCj--CT8yfrLkYcQgh7AdlwbxgAGf1F8&s=LGI543wae-yExjwBECCxix-06AUuiHWHly60hBBnFbQ&e= >> >> Regards, >> Gustavo >> > > - Péter > > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki >
