dma-mapping.h revision 325937
1130803Smarcel/*- 2130803Smarcel * Copyright (c) 2010 Isilon Systems, Inc. 3130803Smarcel * Copyright (c) 2010 iX Systems, Inc. 4130803Smarcel * Copyright (c) 2010 Panasas, Inc. 5130803Smarcel * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6130803Smarcel * All rights reserved. 7130803Smarcel * 8130803Smarcel * Redistribution and use in source and binary forms, with or without 9130803Smarcel * modification, are permitted provided that the following conditions 10130803Smarcel * are met: 11130803Smarcel * 1. Redistributions of source code must retain the above copyright 12130803Smarcel * notice unmodified, this list of conditions, and the following 13130803Smarcel * disclaimer. 14130803Smarcel * 2. Redistributions in binary form must reproduce the above copyright 15130803Smarcel * notice, this list of conditions and the following disclaimer in the 16130803Smarcel * documentation and/or other materials provided with the distribution. 17130803Smarcel * 18130803Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19130803Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20130803Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21130803Smarcel * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22130803Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23130803Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24130803Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25130803Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26130803Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27130803Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28130803Smarcel */ 29130803Smarcel#ifndef _LINUX_DMA_MAPPING_H_ 30130803Smarcel#define _LINUX_DMA_MAPPING_H_ 31130803Smarcel 32130803Smarcel#include <linux/types.h> 33130803Smarcel#include <linux/device.h> 34130803Smarcel#include <linux/err.h> 35130803Smarcel#include <linux/dma-attrs.h> 36130803Smarcel#include <linux/scatterlist.h> 37130803Smarcel#include <linux/mm.h> 38130803Smarcel#include <linux/page.h> 39130803Smarcel 40130803Smarcel#include <sys/systm.h> 41130803Smarcel#include <sys/malloc.h> 42130803Smarcel 43130803Smarcel#include <vm/vm.h> 44130803Smarcel#include <vm/vm_page.h> 45130803Smarcel#include <vm/pmap.h> 46130803Smarcel 47130803Smarcel#include <machine/bus.h> 48130803Smarcel#include <machine/pmap.h> 49130803Smarcel 50130803Smarcelenum dma_data_direction { 51130803Smarcel DMA_BIDIRECTIONAL = 0, 52130803Smarcel DMA_TO_DEVICE = 1, 53130803Smarcel DMA_FROM_DEVICE = 2, 54130803Smarcel DMA_NONE = 3, 55130803Smarcel}; 56130803Smarcel 57130803Smarcelstruct dma_map_ops { 58130803Smarcel void* (*alloc_coherent)(struct device *dev, size_t size, 59130803Smarcel dma_addr_t *dma_handle, gfp_t gfp); 60130803Smarcel void (*free_coherent)(struct device *dev, size_t size, 61130803Smarcel void *vaddr, dma_addr_t dma_handle); 62130803Smarcel dma_addr_t (*map_page)(struct device *dev, struct page *page, 63130803Smarcel unsigned long offset, size_t size, enum dma_data_direction dir, 64130803Smarcel struct dma_attrs *attrs); 65130803Smarcel void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, 66130803Smarcel size_t size, enum dma_data_direction dir, struct dma_attrs *attrs); 67130803Smarcel int (*map_sg)(struct device *dev, struct scatterlist *sg, 68130803Smarcel int nents, enum dma_data_direction dir, struct dma_attrs *attrs); 69130803Smarcel void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents, 70130803Smarcel enum dma_data_direction dir, struct dma_attrs *attrs); 71130803Smarcel void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle, 72130803Smarcel size_t size, enum dma_data_direction dir); 73130803Smarcel void (*sync_single_for_device)(struct device *dev, 74130803Smarcel dma_addr_t dma_handle, size_t size, enum dma_data_direction dir); 75130803Smarcel void (*sync_single_range_for_cpu)(struct device *dev, 76130803Smarcel dma_addr_t dma_handle, unsigned long offset, size_t size, 77130803Smarcel enum dma_data_direction dir); 78130803Smarcel void (*sync_single_range_for_device)(struct device *dev, 79130803Smarcel dma_addr_t dma_handle, unsigned long offset, size_t size, 80130803Smarcel enum dma_data_direction dir); 81130803Smarcel void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, 82130803Smarcel int nents, enum dma_data_direction dir); 83130803Smarcel void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg, 84130803Smarcel int nents, enum dma_data_direction dir); 85130803Smarcel int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); 86130803Smarcel int (*dma_supported)(struct device *dev, u64 mask); 87130803Smarcel int is_phys; 88130803Smarcel}; 89130803Smarcel 90130803Smarcel#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL << (n)) - 1)) 91130803Smarcel 92130803Smarcelstatic inline int 93130803Smarceldma_supported(struct device *dev, u64 mask) 94130803Smarcel{ 95130803Smarcel 96130803Smarcel /* XXX busdma takes care of this elsewhere. */ 97130803Smarcel return (1); 98130803Smarcel} 99130803Smarcel 100130803Smarcelstatic inline int 101130803Smarceldma_set_mask(struct device *dev, u64 dma_mask) 102130803Smarcel{ 103130803Smarcel 104130803Smarcel if (!dev->dma_mask || !dma_supported(dev, dma_mask)) 105130803Smarcel return -EIO; 106130803Smarcel 107130803Smarcel *dev->dma_mask = dma_mask; 108130803Smarcel return (0); 109130803Smarcel} 110130803Smarcel 111130803Smarcelstatic inline int 112130803Smarceldma_set_coherent_mask(struct device *dev, u64 mask) 113130803Smarcel{ 114130803Smarcel 115130803Smarcel if (!dma_supported(dev, mask)) 116130803Smarcel return -EIO; 117130803Smarcel /* XXX Currently we don't support a seperate coherent mask. */ 118130803Smarcel return 0; 119130803Smarcel} 120130803Smarcel 121130803Smarcelstatic inline void * 122130803Smarceldma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 123130803Smarcel gfp_t flag) 124130803Smarcel{ 125130803Smarcel vm_paddr_t high; 126130803Smarcel size_t align; 127130803Smarcel void *mem; 128130803Smarcel 129130803Smarcel if (dev != NULL && dev->dma_mask) 130130803Smarcel high = *dev->dma_mask; 131130803Smarcel else 132130803Smarcel high = BUS_SPACE_MAXADDR_32BIT; 133130803Smarcel align = PAGE_SIZE << get_order(size); 134130803Smarcel mem = (void *)kmem_alloc_contig(kmem_arena, size, flag, 0, high, align, 135130803Smarcel 0, VM_MEMATTR_DEFAULT); 136130803Smarcel if (mem) 137130803Smarcel *dma_handle = vtophys(mem); 138130803Smarcel else 139130803Smarcel *dma_handle = 0; 140130803Smarcel return (mem); 141130803Smarcel} 142130803Smarcel 143130803Smarcelstatic inline void * 144130803Smarceldma_zalloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 145130803Smarcel gfp_t flag) 146130803Smarcel{ 147130803Smarcel 148130803Smarcel return (dma_alloc_coherent(dev, size, dma_handle, flag | __GFP_ZERO)); 149130803Smarcel} 150130803Smarcel 151130803Smarcelstatic inline void 152130803Smarceldma_free_coherent(struct device *dev, size_t size, void *cpu_addr, 153130803Smarcel dma_addr_t dma_handle) 154130803Smarcel{ 155130803Smarcel 156130803Smarcel kmem_free(kmem_arena, (vm_offset_t)cpu_addr, size); 157130803Smarcel} 158130803Smarcel 159130803Smarcel/* XXX This only works with no iommu. */ 160130803Smarcelstatic inline dma_addr_t 161130803Smarceldma_map_single_attrs(struct device *dev, void *ptr, size_t size, 162130803Smarcel enum dma_data_direction dir, struct dma_attrs *attrs) 163130803Smarcel{ 164130803Smarcel 165130803Smarcel return vtophys(ptr); 166130803Smarcel} 167130803Smarcel 168130803Smarcelstatic inline void 169130803Smarceldma_unmap_single_attrs(struct device *dev, dma_addr_t addr, size_t size, 170130803Smarcel enum dma_data_direction dir, struct dma_attrs *attrs) 171130803Smarcel{ 172130803Smarcel} 173130803Smarcel 174130803Smarcelstatic inline int 175130803Smarceldma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, 176130803Smarcel enum dma_data_direction dir, struct dma_attrs *attrs) 177130803Smarcel{ 178130803Smarcel struct scatterlist *sg; 179130803Smarcel int i; 180130803Smarcel 181130803Smarcel for_each_sg(sgl, sg, nents, i) 182130803Smarcel sg_dma_address(sg) = sg_phys(sg); 183130803Smarcel 184130803Smarcel return (nents); 185130803Smarcel} 186130803Smarcel 187130803Smarcelstatic inline void 188130803Smarceldma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents, 189130803Smarcel enum dma_data_direction dir, struct dma_attrs *attrs) 190130803Smarcel{ 191130803Smarcel} 192130803Smarcel 193130803Smarcelstatic inline dma_addr_t 194130803Smarceldma_map_page(struct device *dev, struct page *page, 195130803Smarcel unsigned long offset, size_t size, enum dma_data_direction direction) 196130803Smarcel{ 197130803Smarcel 198130803Smarcel return VM_PAGE_TO_PHYS(page) + offset; 199130803Smarcel} 200130803Smarcel 201130803Smarcelstatic inline void 202130803Smarceldma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, 203130803Smarcel enum dma_data_direction direction) 204130803Smarcel{ 205130803Smarcel} 206130803Smarcel 207130803Smarcelstatic inline void 208130803Smarceldma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, 209130803Smarcel enum dma_data_direction direction) 210130803Smarcel{ 211130803Smarcel} 212130803Smarcel 213130803Smarcelstatic inline void 214130803Smarceldma_sync_single(struct device *dev, dma_addr_t addr, size_t size, 215130803Smarcel enum dma_data_direction dir) 216130803Smarcel{ 217130803Smarcel dma_sync_single_for_cpu(dev, addr, size, dir); 218130803Smarcel} 219130803Smarcel 220130803Smarcelstatic inline void 221130803Smarceldma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, 222130803Smarcel size_t size, enum dma_data_direction direction) 223130803Smarcel{ 224130803Smarcel} 225130803Smarcel 226130803Smarcelstatic inline void 227130803Smarceldma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, 228130803Smarcel enum dma_data_direction direction) 229130803Smarcel{ 230130803Smarcel} 231130803Smarcel 232130803Smarcelstatic inline void 233130803Smarceldma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, 234130803Smarcel enum dma_data_direction direction) 235130803Smarcel{ 236130803Smarcel} 237130803Smarcel 238130803Smarcelstatic inline void 239130803Smarceldma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, 240130803Smarcel unsigned long offset, size_t size, int direction) 241130803Smarcel{ 242130803Smarcel} 243130803Smarcel 244130803Smarcelstatic inline void 245130803Smarceldma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, 246130803Smarcel unsigned long offset, size_t size, int direction) 247130803Smarcel{ 248130803Smarcel} 249130803Smarcel 250130803Smarcelstatic inline int 251130803Smarceldma_mapping_error(struct device *dev, dma_addr_t dma_addr) 252130803Smarcel{ 253130803Smarcel 254130803Smarcel return (0); 255130803Smarcel} 256130803Smarcel 257130803Smarcelstatic inline unsigned int dma_set_max_seg_size(struct device *dev, 258130803Smarcel unsigned int size) 259130803Smarcel{ 260130803Smarcel return (0); 261130803Smarcel} 262130803Smarcel 263130803Smarcel 264130803Smarcel#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) 265130803Smarcel#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) 266130803Smarcel#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) 267130803Smarcel#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) 268130803Smarcel 269130803Smarcel#define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name 270130803Smarcel#define DEFINE_DMA_UNMAP_LEN(name) __u32 name 271130803Smarcel#define dma_unmap_addr(p, name) ((p)->name) 272130803Smarcel#define dma_unmap_addr_set(p, name, v) (((p)->name) = (v)) 273130803Smarcel#define dma_unmap_len(p, name) ((p)->name) 274130803Smarcel#define dma_unmap_len_set(p, name, v) (((p)->name) = (v)) 275130803Smarcel 276130803Smarcelextern int uma_align_cache; 277130803Smarcel#define dma_get_cache_alignment() uma_align_cache 278130803Smarcel 279130803Smarcel#endif /* _LINUX_DMA_MAPPING_H_ */ 280130803Smarcel