--- /dev/null
+#ifndef _LINUX_VMALLOC_H
+#define _LINUX_VMALLOC_H
+
+#include <linux/spinlock.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <asm/page.h> /* pgprot_t */
+#include <linux/rbtree.h>
+
+struct vm_area_struct; /* vma defining user mapping in mm_types.h */
+
+/* bits in flags of vmalloc's vm_struct below */
+#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
+#define VM_ALLOC 0x00000002 /* vmalloc() */
+#define VM_MAP 0x00000004 /* vmap()ed pages */
+#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
+#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
+#define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */
+#define VM_NO_GUARD 0x00000040 /* don't add guard page */
+#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
+/* bits [20..32] reserved for arch specific ioremap internals */
+
+/*
+ * Maximum alignment for ioremap() regions.
+ * Can be overriden by arch-specific value.
+ */
+#ifndef IOREMAP_MAX_ORDER
+#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
+#endif
+
+struct vm_struct {
+ struct vm_struct *next;
+ void *addr;
+ unsigned long size;
+ unsigned long flags;
+ struct page **pages;
+ unsigned int nr_pages;
+ phys_addr_t phys_addr;
+ const void *caller;
+};
+
+struct vmap_area {
+ unsigned long va_start;
+ unsigned long va_end;
+ unsigned long flags;
+ struct rb_node rb_node; /* address sorted rbtree */
+ struct list_head list; /* address sorted list */
+ struct list_head purge_list; /* "lazy purge" list */
+ struct vm_struct *vm;
+ struct rcu_head rcu_head;
+};
+
+/*
+ * Highlevel APIs for driver use
+ */
+extern void vm_unmap_ram(const void *mem, unsigned int count);
+extern void *vm_map_ram(struct page **pages, unsigned int count,
+ int node, pgprot_t prot);
+extern void vm_unmap_aliases(void);
+
+#ifdef CONFIG_MMU
+extern void __init vmalloc_init(void);
+#else
+static inline void vmalloc_init(void)
+{
+}
+#endif
+
+extern void *vmalloc(unsigned long size);
+extern void *vzalloc(unsigned long size);
+extern void *vmalloc_user(unsigned long size);
+extern void *vmalloc_node(unsigned long size, int node);
+extern void *vzalloc_node(unsigned long size, int node);
+extern void *vmalloc_exec(unsigned long size);
+extern void *vmalloc_32(unsigned long size);
+extern void *vmalloc_32_user(unsigned long size);
+extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
+extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
+ unsigned long start, unsigned long end, gfp_t gfp_mask,
+ pgprot_t prot, unsigned long vm_flags, int node,
+ const void *caller);
+
+extern void vfree(const void *addr);
+
+extern void *vmap(struct page **pages, unsigned int count,
+ unsigned long flags, pgprot_t prot);
+extern void vunmap(const void *addr);
+
+extern int remap_vmalloc_range_partial(struct vm_area_struct *vma,
+ unsigned long uaddr, void *kaddr,
+ unsigned long size);
+
+extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
+ unsigned long pgoff);
+void vmalloc_sync_all(void);
+
+/*
+ * Lowlevel-APIs (not for driver use!)
+ */
+
+static inline size_t get_vm_area_size(const struct vm_struct *area)
+{
+ if (!(area->flags & VM_NO_GUARD))
+ /* return actual size without guard page */
+ return area->size - PAGE_SIZE;
+ else
+ return area->size;
+
+}
+
+extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
+extern struct vm_struct *get_vm_area_caller(unsigned long size,
+ unsigned long flags, const void *caller);
+extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
+ unsigned long start, unsigned long end);
+extern struct vm_struct *__get_vm_area_caller(unsigned long size,
+ unsigned long flags,
+ unsigned long start, unsigned long end,
+ const void *caller);
+extern struct vm_struct *remove_vm_area(const void *addr);
+extern struct vm_struct *find_vm_area(const void *addr);
+
+extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
+ struct page **pages);
+#ifdef CONFIG_MMU
+extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
+ pgprot_t prot, struct page **pages);
+extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
+extern void unmap_kernel_range(unsigned long addr, unsigned long size);
+#else
+static inline int
+map_kernel_range_noflush(unsigned long start, unsigned long size,
+ pgprot_t prot, struct page **pages)
+{
+ return size >> PAGE_SHIFT;
+}
+static inline void
+unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
+{
+}
+static inline void
+unmap_kernel_range(unsigned long addr, unsigned long size)
+{
+}
+#endif
+
+/* Allocate/destroy a 'vmalloc' VM area. */
+extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes);
+extern void free_vm_area(struct vm_struct *area);
+
+/* for /dev/kmem */
+extern long vread(char *buf, char *addr, unsigned long count);
+extern long vwrite(char *buf, char *addr, unsigned long count);
+
+/*
+ * Internals. Dont't use..
+ */
+extern struct list_head vmap_area_list;
+extern __init void vm_area_add_early(struct vm_struct *vm);
+extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
+
+#ifdef CONFIG_SMP
+# ifdef CONFIG_MMU
+struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
+ const size_t *sizes, int nr_vms,
+ size_t align);
+
+void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
+# else
+static inline struct vm_struct **
+pcpu_get_vm_areas(const unsigned long *offsets,
+ const size_t *sizes, int nr_vms,
+ size_t align)
+{
+ return NULL;
+}
+
+static inline void
+pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
+{
+}
+# endif
+#endif
+
+struct vmalloc_info {
+ unsigned long used;
+ unsigned long largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi) \
+do { \
+ (vmi)->used = 0; \
+ (vmi)->largest_chunk = 0; \
+} while (0)
+#endif
+
+#endif /* _LINUX_VMALLOC_H */
Code Review / kvmfornfv.git / blobdiff