linux-kernel - [PATCH v4 11/19] iommu/fsl_pamu: Add set_platform_dma

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Date:   Wed,  4 Jan 2023 20:57:17 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Joerg Roedel <joro@...tes.org>, Jason Gunthorpe <jgg@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Kevin Tian <kevin.tian@...el.com>,
        Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc:     Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>,
        Rob Clark <robdclark@...il.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Yong Wu <yong.wu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Matthew Rosato <mjrosato@...ux.ibm.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Thierry Reding <thierry.reding@...il.com>,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Lu Baolu <baolu.lu@...ux.intel.com>
Subject: [PATCH v4 11/19] iommu/fsl_pamu: Add set_platform_dma_ops callback

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 the 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@...ux.intel.com>
---
 drivers/iommu/fsl_pamu_domain.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 4408ac3c49b6..e123161c211a 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -283,9 +283,9 @@ static int fsl_pamu_attach_device(struct iommu_domain *domain,
 	return ret;
 }
 
-static void fsl_pamu_detach_device(struct iommu_domain *domain,
-				   struct device *dev)
+static void fsl_pamu_set_platform_dma(struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
 	const u32 *prop;
 	int len;
@@ -452,9 +452,9 @@ static const struct iommu_ops fsl_pamu_ops = {
 	.domain_alloc	= fsl_pamu_domain_alloc,
 	.probe_device	= fsl_pamu_probe_device,
 	.device_group   = fsl_pamu_device_group,
+	.set_platform_dma_ops = fsl_pamu_set_platform_dma;
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= fsl_pamu_attach_device,
-		.detach_dev	= fsl_pamu_detach_device,
 		.iova_to_phys	= fsl_pamu_iova_to_phys,
 		.free		= fsl_pamu_domain_free,
 	}
-- 
2.34.1