dma-mapping.h revision 289644
1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5270710Shselasky * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6219820Sjeff * All rights reserved. 7219820Sjeff * 8219820Sjeff * Redistribution and use in source and binary forms, with or without 9219820Sjeff * modification, are permitted provided that the following conditions 10219820Sjeff * are met: 11219820Sjeff * 1. Redistributions of source code must retain the above copyright 12219820Sjeff * notice unmodified, this list of conditions, and the following 13219820Sjeff * disclaimer. 14219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 15219820Sjeff * notice, this list of conditions and the following disclaimer in the 16219820Sjeff * documentation and/or other materials provided with the distribution. 17219820Sjeff * 18219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28289644Shselasky * 29289644Shselasky * $FreeBSD: head/sys/ofed/include/linux/dma-mapping.h 289644 2015-10-20 19:08:26Z hselasky $ 30219820Sjeff */ 31219820Sjeff#ifndef _LINUX_DMA_MAPPING_H_ 32219820Sjeff#define _LINUX_DMA_MAPPING_H_ 33219820Sjeff 34219820Sjeff#include <linux/types.h> 35219820Sjeff#include <linux/device.h> 36219820Sjeff#include <linux/err.h> 37219820Sjeff#include <linux/dma-attrs.h> 38219820Sjeff#include <linux/scatterlist.h> 39219820Sjeff#include <linux/mm.h> 40219820Sjeff#include <linux/page.h> 41219820Sjeff 42219820Sjeff#include <sys/systm.h> 43219820Sjeff#include <sys/malloc.h> 44219820Sjeff 45219820Sjeff#include <vm/vm.h> 46219820Sjeff#include <vm/vm_page.h> 47219820Sjeff#include <vm/pmap.h> 48219820Sjeff 49219820Sjeff#include <machine/bus.h> 50219820Sjeff#include <machine/pmap.h> 51219820Sjeff 52219820Sjeffenum dma_data_direction { 53219820Sjeff DMA_BIDIRECTIONAL = 0, 54219820Sjeff DMA_TO_DEVICE = 1, 55219820Sjeff DMA_FROM_DEVICE = 2, 56219820Sjeff DMA_NONE = 3, 57219820Sjeff}; 58219820Sjeff 59219820Sjeffstruct dma_map_ops { 60219820Sjeff void* (*alloc_coherent)(struct device *dev, size_t size, 61219820Sjeff dma_addr_t *dma_handle, gfp_t gfp); 62219820Sjeff void (*free_coherent)(struct device *dev, size_t size, 63219820Sjeff void *vaddr, dma_addr_t dma_handle); 64219820Sjeff dma_addr_t (*map_page)(struct device *dev, struct page *page, 65219820Sjeff unsigned long offset, size_t size, enum dma_data_direction dir, 66219820Sjeff struct dma_attrs *attrs); 67219820Sjeff void (*unmap_page)(struct device *dev, dma_addr_t dma_handle, 68219820Sjeff size_t size, enum dma_data_direction dir, struct dma_attrs *attrs); 69219820Sjeff int (*map_sg)(struct device *dev, struct scatterlist *sg, 70219820Sjeff int nents, enum dma_data_direction dir, struct dma_attrs *attrs); 71219820Sjeff void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents, 72219820Sjeff enum dma_data_direction dir, struct dma_attrs *attrs); 73219820Sjeff void (*sync_single_for_cpu)(struct device *dev, dma_addr_t dma_handle, 74219820Sjeff size_t size, enum dma_data_direction dir); 75219820Sjeff void (*sync_single_for_device)(struct device *dev, 76219820Sjeff dma_addr_t dma_handle, size_t size, enum dma_data_direction dir); 77219820Sjeff void (*sync_single_range_for_cpu)(struct device *dev, 78219820Sjeff dma_addr_t dma_handle, unsigned long offset, size_t size, 79219820Sjeff enum dma_data_direction dir); 80219820Sjeff void (*sync_single_range_for_device)(struct device *dev, 81219820Sjeff dma_addr_t dma_handle, unsigned long offset, size_t size, 82219820Sjeff enum dma_data_direction dir); 83219820Sjeff void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg, 84219820Sjeff int nents, enum dma_data_direction dir); 85219820Sjeff void (*sync_sg_for_device)(struct device *dev, struct scatterlist *sg, 86219820Sjeff int nents, enum dma_data_direction dir); 87219820Sjeff int (*mapping_error)(struct device *dev, dma_addr_t dma_addr); 88219820Sjeff int (*dma_supported)(struct device *dev, u64 mask); 89219820Sjeff int is_phys; 90219820Sjeff}; 91219820Sjeff 92289571Shselasky#define DMA_BIT_MASK(n) ((2ULL << ((n) - 1)) - 1ULL) 93219820Sjeff 94219820Sjeffstatic inline int 95219820Sjeffdma_supported(struct device *dev, u64 mask) 96219820Sjeff{ 97219820Sjeff 98219820Sjeff /* XXX busdma takes care of this elsewhere. */ 99219820Sjeff return (1); 100219820Sjeff} 101219820Sjeff 102219820Sjeffstatic inline int 103219820Sjeffdma_set_mask(struct device *dev, u64 dma_mask) 104219820Sjeff{ 105219820Sjeff 106219820Sjeff if (!dev->dma_mask || !dma_supported(dev, dma_mask)) 107219820Sjeff return -EIO; 108219820Sjeff 109219820Sjeff *dev->dma_mask = dma_mask; 110219820Sjeff return (0); 111219820Sjeff} 112219820Sjeff 113219820Sjeffstatic inline int 114219820Sjeffdma_set_coherent_mask(struct device *dev, u64 mask) 115219820Sjeff{ 116219820Sjeff 117219820Sjeff if (!dma_supported(dev, mask)) 118219820Sjeff return -EIO; 119219820Sjeff /* XXX Currently we don't support a seperate coherent mask. */ 120219820Sjeff return 0; 121219820Sjeff} 122219820Sjeff 123219820Sjeffstatic inline void * 124219820Sjeffdma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 125219820Sjeff gfp_t flag) 126219820Sjeff{ 127219820Sjeff vm_paddr_t high; 128219820Sjeff size_t align; 129219820Sjeff void *mem; 130219820Sjeff 131219820Sjeff if (dev->dma_mask) 132219820Sjeff high = *dev->dma_mask; 133219820Sjeff else 134219820Sjeff high = BUS_SPACE_MAXADDR_32BIT; 135219820Sjeff align = PAGE_SIZE << get_order(size); 136254025Sjeff mem = (void *)kmem_alloc_contig(kmem_arena, size, flag, 0, high, align, 137219820Sjeff 0, VM_MEMATTR_DEFAULT); 138219820Sjeff if (mem) 139219820Sjeff *dma_handle = vtophys(mem); 140219820Sjeff else 141219820Sjeff *dma_handle = 0; 142219820Sjeff return (mem); 143219820Sjeff} 144277396Shselasky 145277396Shselaskystatic inline void * 146277396Shselaskydma_zalloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, 147277396Shselasky gfp_t flag) 148277396Shselasky{ 149277396Shselasky 150277396Shselasky return (dma_alloc_coherent(dev, size, dma_handle, flag | __GFP_ZERO)); 151277396Shselasky} 152219820Sjeff 153219820Sjeffstatic inline void 154219820Sjeffdma_free_coherent(struct device *dev, size_t size, void *cpu_addr, 155219820Sjeff dma_addr_t dma_handle) 156219820Sjeff{ 157219820Sjeff 158254025Sjeff kmem_free(kmem_arena, (vm_offset_t)cpu_addr, size); 159219820Sjeff} 160219820Sjeff 161219820Sjeff/* XXX This only works with no iommu. */ 162219820Sjeffstatic inline dma_addr_t 163219820Sjeffdma_map_single_attrs(struct device *dev, void *ptr, size_t size, 164219820Sjeff enum dma_data_direction dir, struct dma_attrs *attrs) 165219820Sjeff{ 166219820Sjeff 167219820Sjeff return vtophys(ptr); 168219820Sjeff} 169219820Sjeff 170219820Sjeffstatic inline void 171219820Sjeffdma_unmap_single_attrs(struct device *dev, dma_addr_t addr, size_t size, 172219820Sjeff enum dma_data_direction dir, struct dma_attrs *attrs) 173219820Sjeff{ 174219820Sjeff} 175219820Sjeff 176219820Sjeffstatic inline int 177219820Sjeffdma_map_sg_attrs(struct device *dev, struct scatterlist *sgl, int nents, 178219820Sjeff enum dma_data_direction dir, struct dma_attrs *attrs) 179219820Sjeff{ 180219820Sjeff struct scatterlist *sg; 181219820Sjeff int i; 182219820Sjeff 183219820Sjeff for_each_sg(sgl, sg, nents, i) 184219820Sjeff sg_dma_address(sg) = sg_phys(sg); 185219820Sjeff 186219820Sjeff return (nents); 187219820Sjeff} 188219820Sjeff 189219820Sjeffstatic inline void 190219820Sjeffdma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg, int nents, 191219820Sjeff enum dma_data_direction dir, struct dma_attrs *attrs) 192219820Sjeff{ 193219820Sjeff} 194219820Sjeff 195219820Sjeffstatic inline dma_addr_t 196219820Sjeffdma_map_page(struct device *dev, struct page *page, 197219820Sjeff unsigned long offset, size_t size, enum dma_data_direction direction) 198219820Sjeff{ 199219820Sjeff 200219820Sjeff return VM_PAGE_TO_PHYS(page) + offset; 201219820Sjeff} 202219820Sjeff 203219820Sjeffstatic inline void 204219820Sjeffdma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, 205219820Sjeff enum dma_data_direction direction) 206219820Sjeff{ 207219820Sjeff} 208219820Sjeff 209219820Sjeffstatic inline void 210219820Sjeffdma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, 211219820Sjeff enum dma_data_direction direction) 212219820Sjeff{ 213219820Sjeff} 214219820Sjeff 215219820Sjeffstatic inline void 216219820Sjeffdma_sync_single(struct device *dev, dma_addr_t addr, size_t size, 217219820Sjeff enum dma_data_direction dir) 218219820Sjeff{ 219219820Sjeff dma_sync_single_for_cpu(dev, addr, size, dir); 220219820Sjeff} 221219820Sjeff 222219820Sjeffstatic inline void 223219820Sjeffdma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, 224219820Sjeff size_t size, enum dma_data_direction direction) 225219820Sjeff{ 226219820Sjeff} 227219820Sjeff 228219820Sjeffstatic inline void 229219820Sjeffdma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, 230219820Sjeff enum dma_data_direction direction) 231219820Sjeff{ 232219820Sjeff} 233219820Sjeff 234219820Sjeffstatic inline void 235219820Sjeffdma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, 236219820Sjeff enum dma_data_direction direction) 237219820Sjeff{ 238219820Sjeff} 239219820Sjeff 240219820Sjeffstatic inline void 241219820Sjeffdma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, 242219820Sjeff unsigned long offset, size_t size, int direction) 243219820Sjeff{ 244219820Sjeff} 245219820Sjeff 246219820Sjeffstatic inline void 247219820Sjeffdma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, 248219820Sjeff unsigned long offset, size_t size, int direction) 249219820Sjeff{ 250219820Sjeff} 251219820Sjeff 252219820Sjeffstatic inline int 253219820Sjeffdma_mapping_error(struct device *dev, dma_addr_t dma_addr) 254219820Sjeff{ 255219820Sjeff 256219820Sjeff return (0); 257219820Sjeff} 258219820Sjeff 259255932Salfredstatic inline unsigned int dma_set_max_seg_size(struct device *dev, 260255932Salfred unsigned int size) 261255932Salfred{ 262255932Salfred return (0); 263255932Salfred} 264255932Salfred 265255932Salfred 266219820Sjeff#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) 267219820Sjeff#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL) 268219820Sjeff#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL) 269219820Sjeff#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL) 270219820Sjeff 271219820Sjeff#define DEFINE_DMA_UNMAP_ADDR(name) dma_addr_t name 272219820Sjeff#define DEFINE_DMA_UNMAP_LEN(name) __u32 name 273219820Sjeff#define dma_unmap_addr(p, name) ((p)->name) 274219820Sjeff#define dma_unmap_addr_set(p, name, v) (((p)->name) = (v)) 275219820Sjeff#define dma_unmap_len(p, name) ((p)->name) 276219820Sjeff#define dma_unmap_len_set(p, name, v) (((p)->name) = (v)) 277219820Sjeff 278219820Sjeffextern int uma_align_cache; 279219820Sjeff#define dma_get_cache_alignment() uma_align_cache 280219820Sjeff 281219820Sjeff#endif /* _LINUX_DMA_MAPPING_H_ */ 282