mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
249d3327f0
Intel is the only thing that uses this now, convert to the size versions, trying to avoid PAGE_SHIFT. Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/23-v4-c8663abbb606+3f7-iommu_pages_jgg@nvidia.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2024, Google LLC.
|
|
* Pasha Tatashin <pasha.tatashin@soleen.com>
|
|
*/
|
|
|
|
#ifndef __IOMMU_PAGES_H
|
|
#define __IOMMU_PAGES_H
|
|
|
|
#include <linux/iommu.h>
|
|
|
|
/**
|
|
* struct ioptdesc - Memory descriptor for IOMMU page tables
|
|
* @iopt_freelist_elm: List element for a struct iommu_pages_list
|
|
*
|
|
* This struct overlays struct page for now. Do not modify without a good
|
|
* understanding of the issues.
|
|
*/
|
|
struct ioptdesc {
|
|
unsigned long __page_flags;
|
|
|
|
struct list_head iopt_freelist_elm;
|
|
unsigned long __page_mapping;
|
|
pgoff_t __index;
|
|
void *_private;
|
|
|
|
unsigned int __page_type;
|
|
atomic_t __page_refcount;
|
|
#ifdef CONFIG_MEMCG
|
|
unsigned long memcg_data;
|
|
#endif
|
|
};
|
|
|
|
static inline struct ioptdesc *folio_ioptdesc(struct folio *folio)
|
|
{
|
|
return (struct ioptdesc *)folio;
|
|
}
|
|
|
|
static inline struct folio *ioptdesc_folio(struct ioptdesc *iopt)
|
|
{
|
|
return (struct folio *)iopt;
|
|
}
|
|
|
|
static inline struct ioptdesc *virt_to_ioptdesc(void *virt)
|
|
{
|
|
return folio_ioptdesc(virt_to_folio(virt));
|
|
}
|
|
|
|
void *iommu_alloc_pages_node_sz(int nid, gfp_t gfp, size_t size);
|
|
void iommu_free_pages(void *virt);
|
|
void iommu_put_pages_list(struct iommu_pages_list *list);
|
|
|
|
/**
|
|
* iommu_pages_list_add - add the page to a iommu_pages_list
|
|
* @list: List to add the page to
|
|
* @virt: Address returned from iommu_alloc_pages_node_sz()
|
|
*/
|
|
static inline void iommu_pages_list_add(struct iommu_pages_list *list,
|
|
void *virt)
|
|
{
|
|
list_add_tail(&virt_to_ioptdesc(virt)->iopt_freelist_elm, &list->pages);
|
|
}
|
|
|
|
/**
|
|
* iommu_pages_list_splice - Put all the pages in list from into list to
|
|
* @from: Source list of pages
|
|
* @to: Destination list of pages
|
|
*
|
|
* from must be re-initialized after calling this function if it is to be
|
|
* used again.
|
|
*/
|
|
static inline void iommu_pages_list_splice(struct iommu_pages_list *from,
|
|
struct iommu_pages_list *to)
|
|
{
|
|
list_splice(&from->pages, &to->pages);
|
|
}
|
|
|
|
/**
|
|
* iommu_pages_list_empty - True if the list is empty
|
|
* @list: List to check
|
|
*/
|
|
static inline bool iommu_pages_list_empty(struct iommu_pages_list *list)
|
|
{
|
|
return list_empty(&list->pages);
|
|
}
|
|
|
|
/**
|
|
* iommu_alloc_pages_sz - Allocate a zeroed page of a given size from
|
|
* specific NUMA node
|
|
* @nid: memory NUMA node id
|
|
* @gfp: buddy allocator flags
|
|
* @size: Memory size to allocate, this is rounded up to a power of 2
|
|
*
|
|
* Returns the virtual address of the allocated page.
|
|
*/
|
|
static inline void *iommu_alloc_pages_sz(gfp_t gfp, size_t size)
|
|
{
|
|
return iommu_alloc_pages_node_sz(NUMA_NO_NODE, gfp, size);
|
|
}
|
|
|
|
#endif /* __IOMMU_PAGES_H */
|