Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1689016 > unrolled thread

[PATCH v2 01/05] iommu/ipmmu-vmsa: Use iommu_device_register()/unregister()

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [PATCH v2 01/05] iommu/ipmmu-vmsa: Use iommu_device_register()/unregister() Magnus Damm <magnus.damm@gmail.com> - 2017-07-17 15:10 +0200

#1689016 — [PATCH v2 01/05] iommu/ipmmu-vmsa: Use iommu_device_register()/unregister()

From: Magnus Damm <damm+renesas@opensource.se>

Extend the driver to make use of iommu_device_register()/unregister()
functions together with iommu_device_set_ops() and iommu_set_fwnode().

These used to be part of the earlier posted 64-bit ARM (r8a7795) series but
it turns out that these days they are required on 32-bit ARM as well.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---

 Changes since V1:
 - Perform iommu_device_set_ops() and iommu_device_set_fwnode() before
   iommu_device_register() - thanks Robin!

 drivers/iommu/ipmmu-vmsa.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

--- 0001/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c	2017-07-17 21:01:47.140607110 +0900
@@ -35,6 +35,7 @@
 struct ipmmu_vmsa_device {
 	struct device *dev;
 	void __iomem *base;
+	struct iommu_device iommu;
 	struct list_head list;
 
 	unsigned int num_utlbs;
@@ -1054,6 +1055,13 @@ static int ipmmu_probe(struct platform_d
 
 	ipmmu_device_reset(mmu);
 
+	iommu_device_set_ops(&mmu->iommu, &ipmmu_ops);
+	iommu_device_set_fwnode(&mmu->iommu, &pdev->dev.of_node->fwnode);
+
+	ret = iommu_device_register(&mmu->iommu);
+	if (ret)
+		return ret;
+
 	/*
 	 * We can't create the ARM mapping here as it requires the bus to have
 	 * an IOMMU, which only happens when bus_set_iommu() is called in
@@ -1077,6 +1085,8 @@ static int ipmmu_remove(struct platform_
 	list_del(&mmu->list);
 	spin_unlock(&ipmmu_devices_lock);
 
+	iommu_device_unregister(&mmu->iommu);
+
 #if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
 	arm_iommu_release_mapping(mmu->mapping);
 #endif

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web