From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Szyprowski Subject: [PATCH v4 12/18] iommu: exynos: add support for binding more than one sysmmu to master device Date: Fri, 16 Jan 2015 10:13:06 +0100 Message-ID: <1421399592-7482-13-git-send-email-m.szyprowski@samsung.com> References: <1421399592-7482-1-git-send-email-m.szyprowski@samsung.com> Return-path: In-reply-to: <1421399592-7482-1-git-send-email-m.szyprowski@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org To: iommu@lists.linux-foundation.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Marek Szyprowski , linaro-mm-sig@lists.linaro.org, Arnd Bergmann , Shaik Ameer Basha , Cho KyongHo , Joerg Roedel , Thierry Reding , Olof Johansson , Laurent Pinchart , Rob Herring , Will Deacon , David Wodhouse , Inki Dae , Kukjin Kim , Tomasz Figa , Kyungmin Park List-Id: iommu@lists.linux-foundation.org This patch adds support for assigning more than one SYSMMU controller to the master device. This has been achieved simply by chaning the struct device pointer in struct exynos_iommu_owner into the list of struct sysmmu_drvdata of all controllers assigned to the given master device. Signed-off-by: Marek Szyprowski --- drivers/iommu/exynos-iommu.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index e40e699423a6..c6cca44d7858 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -186,7 +186,7 @@ static char *sysmmu_fault_name[SYSMMU_FAULTS_NUM] = { /* attached to dev.archdata.iommu of the master device */ struct exynos_iommu_owner { - struct device *sysmmu; + struct list_head clients; }; struct exynos_iommu_domain { @@ -207,6 +207,7 @@ struct sysmmu_drvdata { spinlock_t lock; struct iommu_domain *domain; struct list_head domain_node; + struct list_head owner_node; phys_addr_t pgtable; int version; }; @@ -693,8 +694,7 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain, if (!has_sysmmu(dev)) return -ENODEV; - data = dev_get_drvdata(owner->sysmmu); - if (data) { + list_for_each_entry(data, &owner->clients, owner_node) { ret = __sysmmu_enable(data, pagetable, domain); if (ret >= 0) { data->master = dev; @@ -722,7 +722,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain, { struct exynos_iommu_domain *priv = domain->priv; phys_addr_t pagetable = virt_to_phys(priv->pgtable); - struct sysmmu_drvdata *data; + struct sysmmu_drvdata *data, *next; unsigned long flags; int found = 0; @@ -730,14 +730,13 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain, return; spin_lock_irqsave(&priv->lock, flags); - list_for_each_entry(data, &priv->clients, domain_node) { + list_for_each_entry_safe(data, next, &priv->clients, domain_node) { if (data->master == dev) { if (__sysmmu_disable(data)) { data->master = NULL; list_del_init(&data->domain_node); } found = true; - break; } } spin_unlock_irqrestore(&priv->lock, flags); -- 1.9.2