1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/iommu/qcom/msm_iommu_priv.h b/drivers/iommu/qcom/msm_iommu_priv.h
new file mode 100644
index 000000000000..4de0d7ef19e6
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+++ b/drivers/iommu/qcom/msm_iommu_priv.h
@@ -0,0 +1,71 @@
+/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MSM_IOMMU_PRIV_H
+#define MSM_IOMMU_PRIV_H
+
+/**
+ * struct msm_iommu_pt - Container for first level page table and its
+ * attributes.
+ * fl_table: Pointer to the first level page table.
+ * redirect: Set to 1 if L2 redirect for page tables are enabled, 0 otherwise.
+ * unaligned_fl_table: Original address of memory for the page table.
+ * fl_table is manually aligned (as per spec) but we need the original address
+ * to free the table.
+ * fl_table_shadow: This is "copy" of the fl_table with some differences.
+ * It stores the same information as fl_table except that instead of storing
+ * second level page table address + page table entry descriptor bits it
+ * stores the second level page table address and the number of used second
+ * level page tables entries. This is used to check whether we need to free
+ * the second level page table which allows us to also free the second level
+ * page table after doing a TLB invalidate which should catch bugs with
+ * clients trying to unmap an address that is being used.
+ * fl_table_shadow will use the lower 9 bits for the use count and the upper
+ * bits for the second level page table address.
+ * sl_table_shadow uses the same concept as fl_table_shadow but for LPAE 2nd
+ * level page tables.
+ */
+#ifdef CONFIG_IOMMU_LPAE
+struct msm_iommu_pt {
+	u64 *fl_table;
+	u64 **sl_table_shadow;
+	int redirect;
+	u64 *unaligned_fl_table;
+};
+#else
+struct msm_iommu_pt {
+	u32 *fl_table;
+	int redirect;
+	u32 *fl_table_shadow;
+};
+#endif
+/**
+ * struct msm_iommu_priv - Container for page table attributes and other
+ * private iommu domain information.
+ * attributes.
+ * pt: Page table attribute structure
+ * list_attached: List of devices (contexts) attached to this domain.
+ * client_name: Name of the domain client.
+ */
+struct msm_iommu_priv {
+	struct msm_iommu_pt pt;
+	struct list_head list_attached;
+	struct iommu_domain domain;
+	const char *client_name;
+};
+
+static inline struct msm_iommu_priv *to_msm_priv(struct iommu_domain *dom)
+{
+	return container_of(dom, struct msm_iommu_priv, domain);
+}
+
+#endif