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Subject[PATCH 01/20] iommu: Add apply_dm_region call-back to iommu-ops
Date
From: Joerg Roedel <jroedel@suse.de>

This new call-back will be used by the iommu driver to do
reserve the given dm_region in its iova space before the
mapping is created.

The call-back is temporary until the dma-ops implementation
is part of the common iommu code.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/iommu.c | 3 +++
include/linux/iommu.h | 3 +++
2 files changed, 6 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3000051..e8d2fb0 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -348,6 +348,9 @@ static int iommu_group_create_direct_mappings(struct iommu_group *group,
list_for_each_entry(entry, &mappings, list) {
dma_addr_t start, end, addr;

+ if (domain->ops->apply_dm_region)
+ domain->ops->apply_dm_region(dev, domain, entry);
+
start = ALIGN(entry->start, pg_size);
end = ALIGN(entry->start + entry->length, pg_size);

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 664683a..a35fb8b 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -152,6 +152,7 @@ struct iommu_dm_region {
* @domain_set_attr: Change domain attributes
* @get_dm_regions: Request list of direct mapping requirements for a device
* @put_dm_regions: Free list of direct mapping requirements for a device
+ * @apply_dm_region: Temporary helper call-back for iova reserved ranges
* @domain_window_enable: Configure and enable a particular window for a domain
* @domain_window_disable: Disable a particular window for a domain
* @domain_set_windows: Set the number of windows for a domain
@@ -186,6 +187,8 @@ struct iommu_ops {
/* Request/Free a list of direct mapping requirements for a device */
void (*get_dm_regions)(struct device *dev, struct list_head *list);
void (*put_dm_regions)(struct device *dev, struct list_head *list);
+ void (*apply_dm_region)(struct device *dev, struct iommu_domain *domain,
+ struct iommu_dm_region *region);

/* Window handling functions */
int (*domain_window_enable)(struct iommu_domain *domain, u32 wnd_nr,
--
1.9.1
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