/*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013-2017 Mellanox Technologies, Ltd. * Copyright (c) 2015 François Tigeot * Copyright (c) 2015 Matthew Dillon * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _LINUXKPI_LINUX_MM_H_ #define _LINUXKPI_LINUX_MM_H_ #include #include #include #include #include #include #include #include #include #include #include #include #define PAGE_ALIGN(x) ALIGN(x, PAGE_SIZE) /* * Make sure our LinuxKPI defined virtual memory flags don't conflict * with the ones defined by FreeBSD: */ CTASSERT((VM_PROT_ALL & -(1 << 8)) == 0); #define VM_READ VM_PROT_READ #define VM_WRITE VM_PROT_WRITE #define VM_EXEC VM_PROT_EXECUTE #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC) #define VM_PFNINTERNAL (1 << 8) /* FreeBSD private flag to vm_insert_pfn() */ #define VM_MIXEDMAP (1 << 9) #define VM_NORESERVE (1 << 10) #define VM_PFNMAP (1 << 11) #define VM_IO (1 << 12) #define VM_MAYWRITE (1 << 13) #define VM_DONTCOPY (1 << 14) #define VM_DONTEXPAND (1 << 15) #define VM_DONTDUMP (1 << 16) #define VM_SHARED (1 << 17) #define VMA_MAX_PREFAULT_RECORD 1 #define FOLL_WRITE (1 << 0) #define FOLL_FORCE (1 << 1) #define VM_FAULT_OOM (1 << 0) #define VM_FAULT_SIGBUS (1 << 1) #define VM_FAULT_MAJOR (1 << 2) #define VM_FAULT_WRITE (1 << 3) #define VM_FAULT_HWPOISON (1 << 4) #define VM_FAULT_HWPOISON_LARGE (1 << 5) #define VM_FAULT_SIGSEGV (1 << 6) #define VM_FAULT_NOPAGE (1 << 7) #define VM_FAULT_LOCKED (1 << 8) #define VM_FAULT_RETRY (1 << 9) #define VM_FAULT_FALLBACK (1 << 10) #define VM_FAULT_ERROR (VM_FAULT_OOM | VM_FAULT_SIGBUS | VM_FAULT_SIGSEGV | \ VM_FAULT_HWPOISON |VM_FAULT_HWPOISON_LARGE | VM_FAULT_FALLBACK) #define FAULT_FLAG_WRITE (1 << 0) #define FAULT_FLAG_MKWRITE (1 << 1) #define FAULT_FLAG_ALLOW_RETRY (1 << 2) #define FAULT_FLAG_RETRY_NOWAIT (1 << 3) #define FAULT_FLAG_KILLABLE (1 << 4) #define FAULT_FLAG_TRIED (1 << 5) #define FAULT_FLAG_USER (1 << 6) #define FAULT_FLAG_REMOTE (1 << 7) #define FAULT_FLAG_INSTRUCTION (1 << 8) #define fault_flag_allow_retry_first(flags) \ (((flags) & (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_TRIED)) == FAULT_FLAG_ALLOW_RETRY) typedef int (*pte_fn_t)(linux_pte_t *, unsigned long addr, void *data); struct vm_area_struct { vm_offset_t vm_start; vm_offset_t vm_end; vm_offset_t vm_pgoff; pgprot_t vm_page_prot; unsigned long vm_flags; struct mm_struct *vm_mm; void *vm_private_data; const struct vm_operations_struct *vm_ops; struct linux_file *vm_file; /* internal operation */ vm_paddr_t vm_pfn; /* PFN for memory map */ vm_size_t vm_len; /* length for memory map */ vm_pindex_t vm_pfn_first; int vm_pfn_count; int *vm_pfn_pcount; vm_object_t vm_obj; vm_map_t vm_cached_map; TAILQ_ENTRY(vm_area_struct) vm_entry; }; struct vm_fault { unsigned int flags; pgoff_t pgoff; union { /* user-space address */ void *virtual_address; /* < 4.11 */ unsigned long address; /* >= 4.11 */ }; struct page *page; struct vm_area_struct *vma; }; struct vm_operations_struct { void (*open) (struct vm_area_struct *); void (*close) (struct vm_area_struct *); int (*fault) (struct vm_fault *); int (*access) (struct vm_area_struct *, unsigned long, void *, int, int); }; struct sysinfo { uint64_t totalram; /* Total usable main memory size */ uint64_t freeram; /* Available memory size */ uint64_t totalhigh; /* Total high memory size */ uint64_t freehigh; /* Available high memory size */ uint32_t mem_unit; /* Memory unit size in bytes */ }; static inline struct page * virt_to_head_page(const void *p) { return (virt_to_page(p)); } /* * Compute log2 of the power of two rounded up count of pages * needed for size bytes. */ static inline int get_order(unsigned long size) { int order; size = (size - 1) >> PAGE_SHIFT; order = 0; while (size) { order++; size >>= 1; } return (order); } /* * Resolve a page into a virtual address: * * NOTE: This function only works for pages allocated by the kernel. */ void *linux_page_address(struct page *); #define page_address(page) linux_page_address(page) static inline void * lowmem_page_address(struct page *page) { return (page_address(page)); } /* * This only works via memory map operations. */ static inline int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, unsigned long size, vm_memattr_t prot) { vma->vm_page_prot = prot; vma->vm_pfn = pfn; vma->vm_len = size; return (0); } vm_fault_t lkpi_vmf_insert_pfn_prot_locked(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, pgprot_t prot); static inline vm_fault_t vmf_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, pgprot_t prot) { vm_fault_t ret; VM_OBJECT_WLOCK(vma->vm_obj); ret = lkpi_vmf_insert_pfn_prot_locked(vma, addr, pfn, prot); VM_OBJECT_WUNLOCK(vma->vm_obj); return (ret); } #define vmf_insert_pfn_prot(...) \ _Static_assert(false, \ "This function is always called in a loop. Consider using the locked version") static inline int apply_to_page_range(struct mm_struct *mm, unsigned long address, unsigned long size, pte_fn_t fn, void *data) { return (-ENOTSUP); } int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, unsigned long size); int lkpi_remap_pfn_range(struct vm_area_struct *vma, unsigned long start_addr, unsigned long start_pfn, unsigned long size, pgprot_t prot); static inline int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, unsigned long size, pgprot_t prot) { return (lkpi_remap_pfn_range(vma, addr, pfn, size, prot)); } static inline unsigned long vma_pages(struct vm_area_struct *vma) { return ((vma->vm_end - vma->vm_start) >> PAGE_SHIFT); } #define offset_in_page(off) ((unsigned long)(off) & (PAGE_SIZE - 1)) static inline void set_page_dirty(struct page *page) { vm_page_dirty(page); } static inline void mark_page_accessed(struct page *page) { vm_page_reference(page); } static inline void get_page(struct page *page) { vm_page_wire(page); } extern long lkpi_get_user_pages(unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **); #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60500 #define get_user_pages(start, nr_pages, gup_flags, pages) \ lkpi_get_user_pages(start, nr_pages, gup_flags, pages) #else #define get_user_pages(start, nr_pages, gup_flags, pages, vmas) \ lkpi_get_user_pages(start, nr_pages, gup_flags, pages) #endif #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60500 static inline long pin_user_pages(unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **pages) { return (get_user_pages(start, nr_pages, gup_flags, pages)); } #else static inline long pin_user_pages(unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **pages, struct vm_area_struct **vmas) { return (get_user_pages(start, nr_pages, gup_flags, pages, vmas)); } #endif extern int __get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **); static inline int pin_user_pages_fast(unsigned long start, int nr_pages, unsigned int gup_flags, struct page **pages) { return __get_user_pages_fast( start, nr_pages, !!(gup_flags & FOLL_WRITE), pages); } extern long get_user_pages_remote(struct task_struct *, struct mm_struct *, unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **, struct vm_area_struct **); static inline long pin_user_pages_remote(struct task_struct *task, struct mm_struct *mm, unsigned long start, unsigned long nr_pages, unsigned int gup_flags, struct page **pages, struct vm_area_struct **vmas) { return get_user_pages_remote( task, mm, start, nr_pages, gup_flags, pages, vmas); } static inline void put_page(struct page *page) { vm_page_unwire(page, PQ_ACTIVE); } #define unpin_user_page(page) put_page(page) #define unpin_user_pages(pages, npages) release_pages(pages, npages) #define copy_highpage(to, from) pmap_copy_page(from, to) static inline pgprot_t vm_get_page_prot(unsigned long vm_flags) { return (vm_flags & VM_PROT_ALL); } static inline void vm_flags_set(struct vm_area_struct *vma, unsigned long flags) { vma->vm_flags |= flags; } static inline void vm_flags_clear(struct vm_area_struct *vma, unsigned long flags) { vma->vm_flags &= ~flags; } static inline struct page * vmalloc_to_page(const void *addr) { vm_paddr_t paddr; paddr = pmap_kextract((vm_offset_t)addr); return (PHYS_TO_VM_PAGE(paddr)); } static inline int trylock_page(struct page *page) { return (vm_page_trylock(page)); } static inline void unlock_page(struct page *page) { vm_page_unlock(page); } extern int is_vmalloc_addr(const void *addr); void si_meminfo(struct sysinfo *si); static inline unsigned long totalram_pages(void) { return ((unsigned long)physmem); } #define unmap_mapping_range(...) lkpi_unmap_mapping_range(__VA_ARGS__) void lkpi_unmap_mapping_range(void *obj, loff_t const holebegin __unused, loff_t const holelen, int even_cows __unused); #define PAGE_ALIGNED(p) __is_aligned(p, PAGE_SIZE) void vma_set_file(struct vm_area_struct *vma, struct linux_file *file); static inline void might_alloc(gfp_t gfp_mask __unused) { } #define is_cow_mapping(flags) (false) static inline bool want_init_on_free(void) { return (false); } #endif /* _LINUXKPI_LINUX_MM_H_ */