1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32 #ifndef _LINUXKPI_LINUX_IO_MAPPING_H_ 33 #define _LINUXKPI_LINUX_IO_MAPPING_H_ 34 35 #include <sys/types.h> 36 #include <machine/vm.h> 37 38 #include <linux/types.h> 39 #include <linux/io.h> 40 #include <linux/mm.h> 41 #include <linux/slab.h> 42 43 struct io_mapping { 44 unsigned long base; 45 unsigned long size; 46 void *mem; 47 vm_memattr_t attr; 48 }; 49 50 struct io_mapping *io_mapping_create_wc(resource_size_t base, unsigned long size); 51 52 static inline struct io_mapping * 53 io_mapping_init_wc(struct io_mapping *mapping, resource_size_t base, 54 unsigned long size) 55 { 56 57 mapping->base = base; 58 mapping->size = size; 59 #ifdef VM_MEMATTR_WRITE_COMBINING 60 mapping->mem = ioremap_wc(base, size); 61 mapping->attr = VM_MEMATTR_WRITE_COMBINING; 62 #else 63 mapping->mem = ioremap_nocache(base, size); 64 mapping->attr = VM_MEMATTR_UNCACHEABLE; 65 #endif 66 return (mapping); 67 } 68 69 static inline void 70 io_mapping_fini(struct io_mapping *mapping) 71 { 72 73 iounmap(mapping->mem); 74 } 75 76 static inline void 77 io_mapping_free(struct io_mapping *mapping) 78 { 79 80 io_mapping_fini(mapping->mem); 81 kfree(mapping); 82 } 83 84 static inline void * 85 io_mapping_map_atomic_wc(struct io_mapping *mapping, unsigned long offset) 86 { 87 88 return ((char *)mapping->mem + offset); 89 } 90 91 static inline void 92 io_mapping_unmap_atomic(void *vaddr) 93 { 94 } 95 96 static inline void * 97 io_mapping_map_local_wc(struct io_mapping *mapping, unsigned long offset) 98 { 99 100 return (io_mapping_map_atomic_wc(mapping, offset)); 101 } 102 103 static inline void 104 io_mapping_unmap_local(void *vaddr __unused) 105 { 106 } 107 108 static inline void * 109 io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset, 110 unsigned long size) 111 { 112 113 return ((char *)mapping->mem + offset); 114 } 115 116 int lkpi_io_mapping_map_user(struct io_mapping *iomap, 117 struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, 118 unsigned long size); 119 120 static inline int 121 io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma, 122 unsigned long addr, unsigned long pfn, unsigned long size) 123 { 124 return (lkpi_io_mapping_map_user(iomap, vma, addr, pfn, size)); 125 } 126 127 static inline void 128 io_mapping_unmap(void *vaddr) 129 { 130 } 131 132 #endif /* _LINUXKPI_LINUX_IO_MAPPING_H_ */ 133