[PATCH v7 06/07] iommu/ipmmu-vmsa: ARM and ARM64 archdata access

[Magnus Damm <magnus.damm@xxxxxxxxx>]

From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>

Not all architectures have an iommu member in their archdata, so
use #ifdefs support build with COMPILE_TEST on any architecture.

Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Reviewed-by: Joerg Roedel <jroedel@xxxxxxx>
---

Changes since V6:
 - Updated patch to handle newly introduced functions in:
   [PATCH v7 05/07] iommu/ipmmu-vmsa: Add new IOMMU_DOMAIN_DMA ops

 drivers/iommu/ipmmu-vmsa.c |   43 ++++++++++++++++++++++++++++++-------------
 1 file changed, 30 insertions(+), 13 deletions(-)

--- 0010/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c	2017-03-06 19:26:26.070607110 +0900
@@ -72,6 +72,25 @@ static struct ipmmu_vmsa_domain *to_vmsa
 	return container_of(dom, struct ipmmu_vmsa_domain, io_domain);
 }
 
+#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
+static struct ipmmu_vmsa_archdata *to_archdata(struct device *dev)
+{
+	return dev->archdata.iommu;
+}
+static void set_archdata(struct device *dev, struct ipmmu_vmsa_archdata *p)
+{
+	dev->archdata.iommu = p;
+}
+#else
+static struct ipmmu_vmsa_archdata *to_archdata(struct device *dev)
+{
+	return NULL;
+}
+static void set_archdata(struct device *dev, struct ipmmu_vmsa_archdata *p)
+{
+}
+#endif
+
 #define TLB_LOOP_TIMEOUT		100	/* 100us */
 
 /* -----------------------------------------------------------------------------
@@ -543,7 +562,7 @@ static void ipmmu_domain_free(struct iom
 static int ipmmu_attach_device(struct iommu_domain *io_domain,
 			       struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 	struct ipmmu_vmsa_device *mmu = archdata->mmu;
 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
 	unsigned long flags;
@@ -588,7 +607,7 @@ static int ipmmu_attach_device(struct io
 static void ipmmu_detach_device(struct iommu_domain *io_domain,
 				struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
 	unsigned int i;
 
@@ -709,7 +728,7 @@ static int ipmmu_init_platform_device(st
 	archdata->utlbs = utlbs;
 	archdata->num_utlbs = num_utlbs;
 	archdata->dev = dev;
-	dev->archdata.iommu = archdata;
+	set_archdata(dev, archdata);
 	return 0;
 
 error:
@@ -729,12 +748,11 @@ static struct iommu_domain *ipmmu_domain
 
 static int ipmmu_add_device(struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata;
 	struct ipmmu_vmsa_device *mmu = NULL;
 	struct iommu_group *group;
 	int ret;
 
-	if (dev->archdata.iommu) {
+	if (to_archdata(dev)) {
 		dev_warn(dev, "IOMMU driver already assigned to device %s\n",
 			 dev_name(dev));
 		return -EINVAL;
@@ -770,8 +788,7 @@ static int ipmmu_add_device(struct devic
 	 * - Make the mapping size configurable ? We currently use a 2GB mapping
 	 *   at a 1GB offset to ensure that NULL VAs will fault.
 	 */
-	archdata = dev->archdata.iommu;
-	mmu = archdata->mmu;
+	mmu = to_archdata(dev)->mmu;
 	if (!mmu->mapping) {
 		struct dma_iommu_mapping *mapping;
 
@@ -799,7 +816,7 @@ error:
 	if (mmu)
 		arm_iommu_release_mapping(mmu->mapping);
 
-	dev->archdata.iommu = NULL;
+	set_archdata(dev, NULL);
 
 	if (!IS_ERR_OR_NULL(group))
 		iommu_group_remove_device(dev);
@@ -809,7 +826,7 @@ error:
 
 static void ipmmu_remove_device(struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 
 	arm_iommu_detach_device(dev);
 	iommu_group_remove_device(dev);
@@ -817,7 +834,7 @@ static void ipmmu_remove_device(struct d
 	kfree(archdata->utlbs);
 	kfree(archdata);
 
-	dev->archdata.iommu = NULL;
+	set_archdata(dev, NULL);
 }
 
 static const struct iommu_ops ipmmu_ops = {
@@ -874,7 +891,7 @@ static void ipmmu_domain_free_dma(struct
 
 static int ipmmu_add_device_dma(struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 	struct iommu_group *group;
 
 	/* The device has been verified in xlate() */
@@ -893,7 +910,7 @@ static int ipmmu_add_device_dma(struct d
 
 static void ipmmu_remove_device_dma(struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 
 	spin_lock(&ipmmu_slave_devices_lock);
 	list_del(&archdata->list);
@@ -904,7 +921,7 @@ static void ipmmu_remove_device_dma(stru
 
 static struct device *ipmmu_find_sibling_device(struct device *dev)
 {
-	struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu;
+	struct ipmmu_vmsa_archdata *archdata = to_archdata(dev);
 	struct ipmmu_vmsa_archdata *sibling_archdata = NULL;
 	bool found = false;