diff options
Diffstat (limited to 'include/linux/memremap.h')
| -rw-r--r-- | include/linux/memremap.h | 57 |
1 files changed, 53 insertions, 4 deletions
diff --git a/include/linux/memremap.h b/include/linux/memremap.h index 30c7aecbd245..713ec0435b48 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -76,11 +76,11 @@ enum memory_type { struct dev_pagemap_ops { /* - * Called once the page refcount reaches 0. The reference count will be + * Called once the folio refcount reaches 0. The reference count will be * reset to one by the core code after the method is called to prepare - * for handing out the page again. + * for handing out the folio again. */ - void (*page_free)(struct page *page); + void (*folio_free)(struct folio *folio); /* * Used for private (un-addressable) device memory only. Must migrate @@ -99,6 +99,13 @@ struct dev_pagemap_ops { */ int (*memory_failure)(struct dev_pagemap *pgmap, unsigned long pfn, unsigned long nr_pages, int mf_flags); + + /* + * Used for private (un-addressable) device memory only. + * This callback is used when a folio is split into + * a smaller folio + */ + void (*folio_split)(struct folio *head, struct folio *tail); }; #define PGMAP_ALTMAP_VALID (1 << 0) @@ -176,6 +183,18 @@ static inline bool folio_is_pci_p2pdma(const struct folio *folio) folio->pgmap->type == MEMORY_DEVICE_PCI_P2PDMA; } +static inline void *folio_zone_device_data(const struct folio *folio) +{ + VM_WARN_ON_FOLIO(!folio_is_device_private(folio), folio); + return folio->page.zone_device_data; +} + +static inline void folio_set_zone_device_data(struct folio *folio, void *data) +{ + VM_WARN_ON_FOLIO(!folio_is_device_private(folio), folio); + folio->page.zone_device_data = data; +} + static inline bool is_pci_p2pdma_page(const struct page *page) { return IS_ENABLED(CONFIG_PCI_P2PDMA) && @@ -205,7 +224,7 @@ static inline bool is_fsdax_page(const struct page *page) } #ifdef CONFIG_ZONE_DEVICE -void zone_device_page_init(struct page *page); +void zone_device_page_init(struct page *page, unsigned int order); void *memremap_pages(struct dev_pagemap *pgmap, int nid); void memunmap_pages(struct dev_pagemap *pgmap); void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap); @@ -214,6 +233,31 @@ struct dev_pagemap *get_dev_pagemap(unsigned long pfn); bool pgmap_pfn_valid(struct dev_pagemap *pgmap, unsigned long pfn); unsigned long memremap_compat_align(void); + +static inline void zone_device_folio_init(struct folio *folio, unsigned int order) +{ + zone_device_page_init(&folio->page, order); + if (order) + folio_set_large_rmappable(folio); +} + +static inline void zone_device_private_split_cb(struct folio *original_folio, + struct folio *new_folio) +{ + if (folio_is_device_private(original_folio)) { + if (!original_folio->pgmap->ops->folio_split) { + if (new_folio) { + new_folio->pgmap = original_folio->pgmap; + new_folio->page.mapping = + original_folio->page.mapping; + } + } else { + original_folio->pgmap->ops->folio_split(original_folio, + new_folio); + } + } +} + #else static inline void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) @@ -247,6 +291,11 @@ static inline unsigned long memremap_compat_align(void) { return PAGE_SIZE; } + +static inline void zone_device_private_split_cb(struct folio *original_folio, + struct folio *new_folio) +{ +} #endif /* CONFIG_ZONE_DEVICE */ static inline void put_dev_pagemap(struct dev_pagemap *pgmap) |