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Fri, 23 Aug 2019 07:56:03 -0500 Received: from DLEE111.ent.ti.com (157.170.170.22) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Fri, 23 Aug 2019 07:56:01 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Fri, 23 Aug 2019 07:56:01 -0500 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id x7NCtwke092319; Fri, 23 Aug 2019 07:55:59 -0500 From: Peter Ujfalusi To: , Subject: [PATCH 0/5] dmaengine: ti: edma: Multicore usage related fixes Date: Fri, 23 Aug 2019 15:56:13 +0300 Message-ID: <20190823125618.8133-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190823_055608_251102_70E9CB0B X-CRM114-Status: GOOD ( 10.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, dan.j.williams@intel.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, When other cores want to use EDMA for their use cases Linux was not playing nicely. By design EDMA is supporting shared use with shadow regions. Linux is using region0, others can be used by other cores. In order to not break multicore shared usage of EDMA: - do not reset paRAM slots which is not allocated for Linux (reserved paRAM slots) - Only reset region0 access registers, do not touch other regions - Add option for reserved channels which should not be used by Linux in a similar fashion as we already have for reserved paRAM slots. Regards, Peter --- Peter Ujfalusi (5): dmaengine: ti: edma: Do not reset reserved paRAM slots dmaengine: ti: edma: Only reset region0 access registers dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits() dt-bindings: dma: ti-edma: Add option for reserved channel ranges dmaengine: ti: edma: Add support for handling reserved channels .../devicetree/bindings/dma/ti-edma.txt | 5 + drivers/dma/ti/edma.c | 190 +++++++++++------- 2 files changed, 123 insertions(+), 72 deletions(-) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel