From mboxrd@z Thu Jan 1 00:00:00 1970 From: laurentiu.tudor@nxp.com Subject: [PATCH 04/21] soc/fsl/qman-portal: map CENA area in the iommu Date: Wed, 19 Sep 2018 15:35:56 +0300 Message-ID: <20180919123613.15092-5-laurentiu.tudor@nxp.com> References: <20180919123613.15092-1-laurentiu.tudor@nxp.com> Cc: roy.pledge@nxp.com, madalin.bucur@nxp.com, davem@davemloft.net, shawnguo@kernel.org, leoyang.li@nxp.com, Laurentiu Tudor To: devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Return-path: Received: from inva021.nxp.com ([92.121.34.21]:60896 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731607AbeISSON (ORCPT ); Wed, 19 Sep 2018 14:14:13 -0400 In-Reply-To: <20180919123613.15092-1-laurentiu.tudor@nxp.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Laurentiu Tudor Add a one-to-one iommu mapping for qman portal CENA register area. This is required for QMAN stashing to work without faults behind an iommu. Signed-off-by: Laurentiu Tudor --- drivers/soc/fsl/qbman/qman_portal.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/soc/fsl/qbman/qman_portal.c b/drivers/soc/fsl/qbman/qman_portal.c index a120002b630e..012bb95e87e1 100644 --- a/drivers/soc/fsl/qbman/qman_portal.c +++ b/drivers/soc/fsl/qbman/qman_portal.c @@ -29,6 +29,7 @@ */ #include "qman_priv.h" +#include struct qman_portal *qman_dma_portal; EXPORT_SYMBOL(qman_dma_portal); @@ -222,6 +223,7 @@ static int qman_portal_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *node = dev->of_node; + struct iommu_domain *domain; struct qm_portal_config *pcfg; struct resource *addr_phys[2]; int irq, cpu, err; @@ -276,6 +278,21 @@ static int qman_portal_probe(struct platform_device *pdev) goto err_ioremap2; } + /* Create an 1-to-1 iommu mapping for cena portal area */ + domain = iommu_get_domain_for_dev(dev); + if (domain) { + /* + * Note: not mapping this as cacheable triggers the infamous + * QMan CIDE error. + */ + err = iommu_map(iommu_get_domain_for_dev(dev), + addr_phys[0]->start, addr_phys[0]->start, + resource_size(addr_phys[0]), + IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE); + if (err) + dev_warn(dev, "failed to iommu_map() %d\n", err); + } + pcfg->pools = qm_get_pools_sdqcr(); spin_lock(&qman_lock); -- 2.17.1