Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751880AbdHaNPK (ORCPT ); Thu, 31 Aug 2017 09:15:10 -0400 Received: from fllnx209.ext.ti.com ([198.47.19.16]:23098 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751404AbdHaNPI (ORCPT ); Thu, 31 Aug 2017 09:15:08 -0400 From: Suman Anna To: Joerg Roedel CC: , Tony Lindgren , Tero Kristo , Laurent Pinchart , , , Suman Anna Subject: [PATCH 0/2] Dual MMU support for TI DRA7xx DSPs Date: Thu, 31 Aug 2017 08:14:00 -0500 Message-ID: <20170831131402.29502-1-s-anna@ti.com> X-Mailer: git-send-email 2.13.1 MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6658 Lines: 118 Hi Joerg, The following two patches enhance the OMAP IOMMU driver to support mirror-programming of two MMUs present within the DSP subsystems specifically on TI DRA7xx/AM57xx family of SOCs. The TI OMAP DSP subsystems traditionally always has a DSP core and an internal EDMA block behind a single MMU within the subsystem, but DRA7xx DSP SoCs now separate these out and the blocks are behind an individual MMU and a dedicated port to connect to the interconnect. The DT usage for these will be of the form, dsp1: dsp@40800000 { ... iommus = <&mmu0_dsp1>, <&mmu1_dsp1>; ... }; The series is based on your current 4.13 based arm/omap branch. The patches add the support in the driver, but the MMU devices themselves are still not created. There are two separate series (Add hwmod data for IPU & DSP processors/MMUs [1] and Enable DRA7 processor MMU DT nodes [2]) that add these patches, and will go through Tony and the linux-omap tree. The consumer nodes/client drivers are still in-progress and will depend on this series being merged first. Series is tested along-side these two additional series and adding the other consumer patches, no change in behavior with just these patches. regards Suman [1] https://marc.info/?l=linux-omap&m=150335933714097&w=2 [2] https://marc.info/?l=linux-omap&m=150335958414166&w=2 Following is an output of sysfs with these MMUs exercised with additional patches: root@dra7xx-evm:~# ls -l /sys/kernel/iommu_groups/ drwxr-xr-x 3 root root 0 Aug 8 03:59 0 drwxr-xr-x 3 root root 0 Aug 8 03:59 1 drwxr-xr-x 3 root root 0 Aug 8 03:59 2 drwxr-xr-x 3 root root 0 Aug 8 03:59 3 drwxr-xr-x 3 root root 0 Aug 8 03:59 4 drwxr-xr-x 3 root root 0 Aug 8 03:59 5 root@dra7xx-evm:~# ls -l /sys/kernel/iommu_groups/*/devices /sys/kernel/iommu_groups/0/devices: lrwxrwxrwx 1 root root 0 Aug 8 03:59 40800000.dsp -> ../../../../devices/platform/44000000.ocp/40800000.dsp /sys/kernel/iommu_groups/1/devices: /sys/kernel/iommu_groups/2/devices: lrwxrwxrwx 1 root root 0 Aug 8 03:59 58820000.ipu -> ../../../../devices/platform/44000000.ocp/58820000.ipu /sys/kernel/iommu_groups/3/devices: lrwxrwxrwx 1 root root 0 Aug 8 03:59 55020000.ipu -> ../../../../devices/platform/44000000.ocp/55020000.ipu /sys/kernel/iommu_groups/4/devices: lrwxrwxrwx 1 root root 0 Aug 8 03:59 41000000.dsp -> ../../../../devices/platform/44000000.ocp/41000000.dsp /sys/kernel/iommu_groups/5/devices: root@dra7xx-evm:~# ls -l /sys/kernel/iommu_groups/*/devices/*/ /sys/kernel/iommu_groups/0/devices/40800000.dsp/: lrwxrwxrwx 1 root root 0 Aug 8 15:59 driver -> ../../../../bus/platform/drivers/omap-rproc -rw-r--r-- 1 root root 4096 Aug 8 03:59 driver_override lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu -> ../40d01000.mmu/iommu/40d01000.mmu lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu_group -> ../../../../kernel/iommu_groups/0 -r--r--r-- 1 root root 4096 Aug 8 03:59 modalias lrwxrwxrwx 1 root root 0 Aug 8 03:59 of_node -> ../../../../firmware/devicetree/base/ocp/dsp@40800000 drwxr-xr-x 2 root root 0 Aug 8 03:59 power drwxr-xr-x 3 root root 0 Aug 8 04:03 remoteproc lrwxrwxrwx 1 root root 0 Aug 8 03:59 subsystem -> ../../../../bus/platform -rw-r--r-- 1 root root 4096 Aug 8 03:59 uevent /sys/kernel/iommu_groups/2/devices/58820000.ipu/: lrwxrwxrwx 1 root root 0 Aug 8 15:59 driver -> ../../../../bus/platform/drivers/omap-rproc -rw-r--r-- 1 root root 4096 Aug 8 03:59 driver_override lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu -> ../58882000.mmu/iommu/58882000.mmu lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu_group -> ../../../../kernel/iommu_groups/2 -r--r--r-- 1 root root 4096 Aug 8 03:59 modalias lrwxrwxrwx 1 root root 0 Aug 8 03:59 of_node -> ../../../../firmware/devicetree/base/ocp/ipu@58820000 drwxr-xr-x 2 root root 0 Aug 8 03:59 power drwxr-xr-x 3 root root 0 Aug 8 04:03 remoteproc lrwxrwxrwx 1 root root 0 Aug 8 03:59 subsystem -> ../../../../bus/platform -rw-r--r-- 1 root root 4096 Aug 8 03:59 uevent /sys/kernel/iommu_groups/3/devices/55020000.ipu/: lrwxrwxrwx 1 root root 0 Aug 8 15:59 driver -> ../../../../bus/platform/drivers/omap-rproc -rw-r--r-- 1 root root 4096 Aug 8 03:59 driver_override lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu -> ../55082000.mmu/iommu/55082000.mmu lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu_group -> ../../../../kernel/iommu_groups/3 -r--r--r-- 1 root root 4096 Aug 8 03:59 modalias lrwxrwxrwx 1 root root 0 Aug 8 03:59 of_node -> ../../../../firmware/devicetree/base/ocp/ipu@55020000 drwxr-xr-x 2 root root 0 Aug 8 03:59 power drwxr-xr-x 3 root root 0 Aug 8 04:03 remoteproc lrwxrwxrwx 1 root root 0 Aug 8 03:59 subsystem -> ../../../../bus/platform -rw-r--r-- 1 root root 4096 Aug 8 03:59 uevent /sys/kernel/iommu_groups/4/devices/41000000.dsp/: lrwxrwxrwx 1 root root 0 Aug 8 15:59 driver -> ../../../../bus/platform/drivers/omap-rproc -rw-r--r-- 1 root root 4096 Aug 8 03:59 driver_override lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu -> ../41501000.mmu/iommu/41501000.mmu lrwxrwxrwx 1 root root 0 Aug 8 03:59 iommu_group -> ../../../../kernel/iommu_groups/4 -r--r--r-- 1 root root 4096 Aug 8 03:59 modalias lrwxrwxrwx 1 root root 0 Aug 8 03:59 of_node -> ../../../../firmware/devicetree/base/ocp/dsp@41000000 drwxr-xr-x 2 root root 0 Aug 8 03:59 power drwxr-xr-x 3 root root 0 Aug 8 04:03 remoteproc lrwxrwxrwx 1 root root 0 Aug 8 03:59 subsystem -> ../../../../bus/platform -rw-r--r-- 1 root root 4096 Aug 8 03:59 uevent Suman Anna (2): iommu/omap: Change the attach detection logic iommu/omap: Add support to program multiple iommus drivers/iommu/omap-iommu.c | 324 ++++++++++++++++++++++++++++++++++----------- drivers/iommu/omap-iommu.h | 30 ++--- 2 files changed, 259 insertions(+), 95 deletions(-) -- 2.13.1