linux-kernel - [RFC PATCH 4/4] iommu/of: get rid of fsl-mc specific code

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Message-Id: <20200227100542.13819-4-laurentiu.tudor@nxp.com>
Date:   Thu, 27 Feb 2020 12:05:42 +0200
From:   laurentiu.tudor@....com
To:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org
Cc:     robin.murphy@....com, lorenzo.pieralisi@....com,
        ard.biesheuvel@...aro.org, ioana.ciornei@....com,
        diana.craciun@....nxp.com, maz@...nel.org, jon@...id-run.com,
        pankaj.bansal@....com, makarand.pawagi@....com,
        calvin.johnson@....com, V.Sethi@....com, cristian.sovaiala@....com,
        Stuart.Yoder@....com, jeremy.linton@....com, joro@...tes.org,
        tglx@...utronix.de, jason@...edaemon.net,
        Laurentiu Tudor <laurentiu.tudor@....com>
Subject: [RFC PATCH 4/4] iommu/of: get rid of fsl-mc specific code

From: Laurentiu Tudor <laurentiu.tudor@....com>

Changing the way we configure dma for fsl-mc devices allows
us to get rid of our fsl-mc specific code in the generic
of iommu code.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
---
 drivers/iommu/of_iommu.c | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 20738aacac89..332072ada474 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -15,7 +15,6 @@
 #include <linux/of_pci.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
-#include <linux/fsl/mc.h>
 
 #define NO_IOMMU	1
 
@@ -139,23 +138,6 @@ static int of_pci_iommu_init(struct pci_dev *pdev, u16 alias, void *data)
 	return err;
 }
 
-static int of_fsl_mc_iommu_init(struct fsl_mc_device *mc_dev,
-				struct device_node *master_np)
-{
-	struct of_phandle_args iommu_spec = { .args_count = 1 };
-	int err;
-
-	err = of_map_rid(master_np, mc_dev->icid, "iommu-map",
-			 "iommu-map-mask", &iommu_spec.np,
-			 iommu_spec.args);
-	if (err)
-		return err == -ENODEV ? NO_IOMMU : err;
-
-	err = of_iommu_xlate(&mc_dev->dev, &iommu_spec);
-	of_node_put(iommu_spec.np);
-	return err;
-}
-
 const struct iommu_ops *of_iommu_configure(struct device *dev,
 					   struct device_node *master_np)
 {
@@ -188,8 +170,6 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
 		pci_request_acs();
 		err = pci_for_each_dma_alias(to_pci_dev(dev),
 					     of_pci_iommu_init, &info);
-	} else if (dev_is_fsl_mc(dev)) {
-		err = of_fsl_mc_iommu_init(to_fsl_mc_device(dev), master_np);
 	} else {
 		struct of_phandle_args iommu_spec;
 		int idx = 0;
-- 
2.17.1