Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752936AbdG1UuQ (ORCPT ); Fri, 28 Jul 2017 16:50:16 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:41365 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752628AbdG1Uto (ORCPT ); Fri, 28 Jul 2017 16:49:44 -0400 From: Josue Albarran To: Joerg Roedel CC: , , Suman Anna , Laurent Pinchart , , Subject: [PATCH 0/2] iommu/omap: Rework cache functionality with DMA Streaming API Date: Fri, 28 Jul 2017 15:49:12 -0500 Message-ID: <1501274954-20973-1-git-send-email-j-albarran@ti.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1349 Lines: 39 Hi Joerg, This series adapts the OMAP IOMMU driver to use the DMA API to flush the page table/directory table entries from the CPU caches instead of the ARM assembly calls. The patches are baselined on 4.13-rc1. Following is the patch summary: 1. Patch 1 disables the OMAP IOMMU fault interrupts instead of disabling the MMU upon a fault, and resulted in recurring bus errors during remoteproc recovery on OMAP4. The MMU fault itself is triggered due to the missing PL310 L2 cache operations, and this patch fixes the recurring bus errors. 2. The second patch makes the adaptation to the DMA API for flushing the caches. This fixes the MMU fault triggering issues in the first place on OMAP4. I have tested these patches on DRA7, OMAP5, and OMAP4 platforms using both OMAP IOMMU unit tests and some out-of-tree patches for exercising the MMUs using the OMAP remoteproc driver. Laurent, Appreciate it if you can check the OMAP3ISP functionality with these patches once. Regards Josue Fernando Guzman Lugo (1): iommu/omap: Fix disabling of MMU upon a fault Josue Albarran (1): iommu/omap: Use DMA-API for performing cache flushes drivers/iommu/omap-iommu.c | 125 +++++++++++++++++++++++++++++---------------- drivers/iommu/omap-iommu.h | 1 + 2 files changed, 81 insertions(+), 45 deletions(-) -- 2.7.4