Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_HUGETLB_H |
| 2 | #define _LINUX_HUGETLB_H |
| 3 | |
| 4 | #ifdef CONFIG_HUGETLB_PAGE |
| 5 | |
| 6 | #include <linux/mempolicy.h> |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 7 | #include <asm/tlbflush.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | struct ctl_table; |
| 10 | |
| 11 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 12 | { |
| 13 | return vma->vm_flags & VM_HUGETLB; |
| 14 | } |
| 15 | |
| 16 | int hugetlb_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); |
| 17 | int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *); |
| 18 | int follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *, struct page **, struct vm_area_struct **, unsigned long *, int *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | void unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
Chen, Kenneth W | 502717f | 2006-10-11 01:20:46 -0700 | [diff] [blame] | 20 | void __unmap_hugepage_range(struct vm_area_struct *, unsigned long, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | int hugetlb_prefault(struct address_space *, struct vm_area_struct *); |
| 22 | int hugetlb_report_meminfo(char *); |
| 23 | int hugetlb_report_node_meminfo(int, char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | unsigned long hugetlb_total_pages(void); |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 25 | int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, |
| 26 | unsigned long address, int write_access); |
Chen, Kenneth W | a43a8c3 | 2006-06-23 02:03:15 -0700 | [diff] [blame] | 27 | int hugetlb_reserve_pages(struct inode *inode, long from, long to); |
| 28 | void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | extern unsigned long max_huge_pages; |
| 31 | extern const unsigned long hugetlb_zero, hugetlb_infinity; |
| 32 | extern int sysctl_hugetlb_shm_group; |
| 33 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 34 | /* arch callbacks */ |
| 35 | |
| 36 | pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr); |
| 37 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr); |
Chen, Kenneth W | 39dde65 | 2006-12-06 20:32:03 -0800 | [diff] [blame^] | 38 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 39 | struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, |
| 40 | int write); |
| 41 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 42 | pmd_t *pmd, int write); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 43 | int pmd_huge(pmd_t pmd); |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 44 | void hugetlb_change_protection(struct vm_area_struct *vma, |
| 45 | unsigned long address, unsigned long end, pgprot_t newprot); |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #ifndef ARCH_HAS_HUGEPAGE_ONLY_RANGE |
| 48 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 49 | #endif |
| 50 | |
| 51 | #ifndef ARCH_HAS_HUGETLB_FREE_PGD_RANGE |
| 52 | #define hugetlb_free_pgd_range free_pgd_range |
David Gibson | 3915bcf | 2006-03-22 00:08:59 -0800 | [diff] [blame] | 53 | #else |
| 54 | void hugetlb_free_pgd_range(struct mmu_gather **tlb, unsigned long addr, |
| 55 | unsigned long end, unsigned long floor, |
| 56 | unsigned long ceiling); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #endif |
| 58 | |
| 59 | #ifndef ARCH_HAS_PREPARE_HUGEPAGE_RANGE |
David Gibson | 42b88be | 2006-03-22 00:09:01 -0800 | [diff] [blame] | 60 | /* |
| 61 | * If the arch doesn't supply something else, assume that hugepage |
| 62 | * size aligned regions are ok without further preparation. |
| 63 | */ |
Hugh Dickins | 68589bc | 2006-11-14 02:03:32 -0800 | [diff] [blame] | 64 | static inline int prepare_hugepage_range(unsigned long addr, unsigned long len, |
| 65 | pgoff_t pgoff) |
David Gibson | 42b88be | 2006-03-22 00:09:01 -0800 | [diff] [blame] | 66 | { |
Hugh Dickins | 68589bc | 2006-11-14 02:03:32 -0800 | [diff] [blame] | 67 | if (pgoff & (~HPAGE_MASK >> PAGE_SHIFT)) |
| 68 | return -EINVAL; |
David Gibson | 42b88be | 2006-03-22 00:09:01 -0800 | [diff] [blame] | 69 | if (len & ~HPAGE_MASK) |
| 70 | return -EINVAL; |
| 71 | if (addr & ~HPAGE_MASK) |
| 72 | return -EINVAL; |
| 73 | return 0; |
| 74 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #else |
Hugh Dickins | 68589bc | 2006-11-14 02:03:32 -0800 | [diff] [blame] | 76 | int prepare_hugepage_range(unsigned long addr, unsigned long len, |
| 77 | pgoff_t pgoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #endif |
| 79 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 80 | #ifndef ARCH_HAS_SETCLEAR_HUGE_PTE |
| 81 | #define set_huge_pte_at(mm, addr, ptep, pte) set_pte_at(mm, addr, ptep, pte) |
| 82 | #define huge_ptep_get_and_clear(mm, addr, ptep) ptep_get_and_clear(mm, addr, ptep) |
| 83 | #else |
| 84 | void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |
| 85 | pte_t *ptep, pte_t pte); |
| 86 | pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 87 | pte_t *ptep); |
| 88 | #endif |
| 89 | |
| 90 | #ifndef ARCH_HAS_HUGETLB_PREFAULT_HOOK |
| 91 | #define hugetlb_prefault_arch_hook(mm) do { } while (0) |
| 92 | #else |
| 93 | void hugetlb_prefault_arch_hook(struct mm_struct *mm); |
| 94 | #endif |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #else /* !CONFIG_HUGETLB_PAGE */ |
| 97 | |
| 98 | static inline int is_vm_hugetlb_page(struct vm_area_struct *vma) |
| 99 | { |
| 100 | return 0; |
| 101 | } |
| 102 | static inline unsigned long hugetlb_total_pages(void) |
| 103 | { |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | #define follow_hugetlb_page(m,v,p,vs,a,b,i) ({ BUG(); 0; }) |
| 108 | #define follow_huge_addr(mm, addr, write) ERR_PTR(-EINVAL) |
| 109 | #define copy_hugetlb_page_range(src, dst, vma) ({ BUG(); 0; }) |
| 110 | #define hugetlb_prefault(mapping, vma) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #define unmap_hugepage_range(vma, start, end) BUG() |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #define hugetlb_report_meminfo(buf) 0 |
| 113 | #define hugetlb_report_node_meminfo(n, buf) 0 |
| 114 | #define follow_huge_pmd(mm, addr, pmd, write) NULL |
Hugh Dickins | 68589bc | 2006-11-14 02:03:32 -0800 | [diff] [blame] | 115 | #define prepare_hugepage_range(addr,len,pgoff) (-EINVAL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | #define pmd_huge(x) 0 |
| 117 | #define is_hugepage_only_range(mm, addr, len) 0 |
David Gibson | 9da61ae | 2006-03-22 00:08:57 -0800 | [diff] [blame] | 118 | #define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; }) |
Hugh Dickins | ac9b9c6 | 2005-10-20 16:24:28 +0100 | [diff] [blame] | 119 | #define hugetlb_fault(mm, vma, addr, write) ({ BUG(); 0; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Zhang, Yanmin | 8f86059 | 2006-03-22 00:08:50 -0800 | [diff] [blame] | 121 | #define hugetlb_change_protection(vma, address, end, newprot) |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | #ifndef HPAGE_MASK |
Robin Holt | 51c6f66 | 2005-11-13 16:06:42 -0800 | [diff] [blame] | 124 | #define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ |
| 125 | #define HPAGE_SIZE PAGE_SIZE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | #endif |
| 127 | |
| 128 | #endif /* !CONFIG_HUGETLB_PAGE */ |
| 129 | |
| 130 | #ifdef CONFIG_HUGETLBFS |
| 131 | struct hugetlbfs_config { |
| 132 | uid_t uid; |
| 133 | gid_t gid; |
| 134 | umode_t mode; |
| 135 | long nr_blocks; |
| 136 | long nr_inodes; |
| 137 | }; |
| 138 | |
| 139 | struct hugetlbfs_sb_info { |
| 140 | long max_blocks; /* blocks allowed */ |
| 141 | long free_blocks; /* blocks free */ |
| 142 | long max_inodes; /* inodes allowed */ |
| 143 | long free_inodes; /* inodes free */ |
| 144 | spinlock_t stat_lock; |
| 145 | }; |
| 146 | |
| 147 | |
| 148 | struct hugetlbfs_inode_info { |
| 149 | struct shared_policy policy; |
| 150 | struct inode vfs_inode; |
| 151 | }; |
| 152 | |
| 153 | static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode) |
| 154 | { |
| 155 | return container_of(inode, struct hugetlbfs_inode_info, vfs_inode); |
| 156 | } |
| 157 | |
| 158 | static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb) |
| 159 | { |
| 160 | return sb->s_fs_info; |
| 161 | } |
| 162 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 163 | extern const struct file_operations hugetlbfs_file_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | extern struct vm_operations_struct hugetlb_vm_ops; |
| 165 | struct file *hugetlb_zero_setup(size_t); |
| 166 | int hugetlb_get_quota(struct address_space *mapping); |
| 167 | void hugetlb_put_quota(struct address_space *mapping); |
| 168 | |
| 169 | static inline int is_file_hugepages(struct file *file) |
| 170 | { |
| 171 | return file->f_op == &hugetlbfs_file_operations; |
| 172 | } |
| 173 | |
| 174 | static inline void set_file_hugepages(struct file *file) |
| 175 | { |
| 176 | file->f_op = &hugetlbfs_file_operations; |
| 177 | } |
| 178 | #else /* !CONFIG_HUGETLBFS */ |
| 179 | |
| 180 | #define is_file_hugepages(file) 0 |
| 181 | #define set_file_hugepages(file) BUG() |
| 182 | #define hugetlb_zero_setup(size) ERR_PTR(-ENOSYS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
| 184 | #endif /* !CONFIG_HUGETLBFS */ |
| 185 | |
| 186 | #endif /* _LINUX_HUGETLB_H */ |