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From:   Lu Baolu <baolu.lu@linux.intel.com>
To:     Joerg Roedel <joro@8bytes.org>, Jason Gunthorpe <jgg@nvidia.com>,
        Christoph Hellwig <hch@infradead.org>,
        Kevin Tian <kevin.tian@intel.com>,
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Cc:     Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
        Hector Martin <marcan@marcan.st>,
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        Rob Clark <robdclark@gmail.com>,
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        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
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        Yong Wu <yong.wu@mediatek.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Heiko Stuebner <heiko@sntech.de>,
        Matthew Rosato <mjrosato@linux.ibm.com>,
        Orson Zhai <orsonzhai@gmail.com>,
        Baolin Wang <baolin.wang@linux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
        Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v4 16/19] iommu/gart: Add set_platform_dma_ops callback
Date:   Wed,  4 Jan 2023 20:57:22 +0800
Message-Id: <20230104125725.271850-17-baolu.lu@linux.intel.com>
In-Reply-To: <20230104125725.271850-1-baolu.lu@linux.intel.com>
References: <20230104125725.271850-1-baolu.lu@linux.intel.com>
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This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma_ops callback so that the IOMMU core could return the
DMA control. With set_platform_dma_ops implemented, there's no need for
detach_dev. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/tegra-gart.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index ed53279d1106..a482ff838b53 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -124,9 +124,9 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
 	return ret;
 }
 
-static void gart_iommu_detach_dev(struct iommu_domain *domain,
-				  struct device *dev)
+static void gart_iommu_set_platform_dma(struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct gart_device *gart = gart_handle;
 
 	spin_lock(&gart->dom_lock);
@@ -270,11 +270,11 @@ static const struct iommu_ops gart_iommu_ops = {
 	.domain_alloc	= gart_iommu_domain_alloc,
 	.probe_device	= gart_iommu_probe_device,
 	.device_group	= generic_device_group,
+	.set_platform_dma_ops = gart_iommu_set_platform_dma,
 	.pgsize_bitmap	= GART_IOMMU_PGSIZES,
 	.of_xlate	= gart_iommu_of_xlate,
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= gart_iommu_attach_dev,
-		.detach_dev	= gart_iommu_detach_dev,
 		.map		= gart_iommu_map,
 		.unmap		= gart_iommu_unmap,
 		.iova_to_phys	= gart_iommu_iova_to_phys,
-- 
2.34.1