74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
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/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef MSM_IOMMU_PRIV_H
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#define MSM_IOMMU_PRIV_H
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/**
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* struct msm_iommu_pt - Container for first level page table and its
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* attributes.
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* fl_table: Pointer to the first level page table.
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* redirect: Set to 1 if L2 redirect for page tables are enabled, 0 otherwise.
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* unaligned_fl_table: Original address of memory for the page table.
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* fl_table is manually aligned (as per spec) but we need the original address
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* to free the table.
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* fl_table_shadow: This is "copy" of the fl_table with some differences.
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* It stores the same information as fl_table except that instead of storing
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* second level page table address + page table entry descriptor bits it
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* stores the second level page table address and the number of used second
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* level page tables entries. This is used to check whether we need to free
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* the second level page table which allows us to also free the second level
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* page table after doing a TLB invalidate which should catch bugs with
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* clients trying to unmap an address that is being used.
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* fl_table_shadow will use the lower 9 bits for the use count and the upper
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* bits for the second level page table address.
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* sl_table_shadow uses the same concept as fl_table_shadow but for LPAE 2nd
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* level page tables.
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*/
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#if defined(CONFIG_IOMMU_LPAE) || defined(CONFIG_IOMMU_AARCH64)
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struct msm_iommu_pt {
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u64 *fl_table;
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u64 **sl_table_shadow;
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int redirect;
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u64 *unaligned_fl_table;
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};
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#else
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struct msm_iommu_pt {
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u32 *fl_table;
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int redirect;
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u32 *fl_table_shadow;
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};
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#endif
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/**
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* struct msm_iommu_priv - Container for page table attributes and other
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* private iommu domain information.
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* attributes.
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* pt: Page table attribute structure
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* list_attached: List of devices (contexts) attached to this domain.
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* client_name: Name of the domain client.
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* procid: Procid used by the clients
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* asid: Unique asid assigned to each domain
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* attributes: Attributes associated with domains, like DYNAMIC attributes
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* base: If the domain is dynamic in nature, it must point to its base domain
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*/
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struct msm_iommu_priv {
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struct msm_iommu_pt pt;
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struct list_head list_attached;
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const char *client_name;
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u32 procid;
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u32 asid;
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u32 attributes;
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struct iommu_domain *base;
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};
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#endif
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