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Commit 33b21a6b authored Jul 05, 2016 by Joerg Roedel

iommu: Add apply_dm_region call-back to iommu-ops



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>

parent b548e786

drivers/iommu/iommu.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);

include/linux/iommu.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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,