~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/linux/dma-mapping.h

Version: ~ [ linux-5.5-rc6 ] ~ [ linux-5.4.11 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.95 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.164 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.209 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.209 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.81 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 #ifndef _LINUX_DMA_MAPPING_H
  2 #define _LINUX_DMA_MAPPING_H
  3 
  4 #include <linux/string.h>
  5 #include <linux/device.h>
  6 #include <linux/err.h>
  7 #include <linux/dma-attrs.h>
  8 #include <linux/dma-direction.h>
  9 #include <linux/scatterlist.h>
 10 
 11 struct dma_map_ops {
 12         void* (*alloc)(struct device *dev, size_t size,
 13                                 dma_addr_t *dma_handle, gfp_t gfp,
 14                                 struct dma_attrs *attrs);
 15         void (*free)(struct device *dev, size_t size,
 16                               void *vaddr, dma_addr_t dma_handle,
 17                               struct dma_attrs *attrs);
 18         int (*mmap)(struct device *, struct vm_area_struct *,
 19                           void *, dma_addr_t, size_t, struct dma_attrs *attrs);
 20 
 21         int (*get_sgtable)(struct device *dev, struct sg_table *sgt, void *,
 22                            dma_addr_t, size_t, struct dma_attrs *attrs);
 23 
 24         dma_addr_t (*map_page)(struct device *dev, struct page *page,
 25                                unsigned long offset, size_t size,
 26                                enum dma_data_direction dir,
 27                                struct dma_attrs *attrs);
 28         void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
 29                            size_t size, enum dma_data_direction dir,
 30                            struct dma_attrs *attrs);
 31         int (*map_sg)(struct device *dev, struct scatterlist *sg,
 32                       int nents, enum dma_data_direction dir,
 33                       struct dma_attrs *attrs);
 34         void (*unmap_sg)(struct device *dev,
 35                          struct scatterlist *sg, int nents,
 36                          enum dma_data_direction dir,
 37                          struct dma_attrs *attrs);
 38         void (*sync_single_for_cpu)(struct device *dev,
 39                                     dma_addr_t dma_handle, size_t size,
 40                                     enum dma_data_direction dir);
 41         void (*sync_single_for_device)(struct device *dev,
 42                                        dma_addr_t dma_handle, size_t size,
 43                                        enum dma_data_direction dir);
 44         void (*sync_sg_for_cpu)(struct device *dev,
 45                                 struct scatterlist *sg, int nents,
 46                                 enum dma_data_direction dir);
 47         void (*sync_sg_for_device)(struct device *dev,
 48                                    struct scatterlist *sg, int nents,
 49                                    enum dma_data_direction dir);
 50         int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
 51         int (*dma_supported)(struct device *dev, u64 mask);
 52         int (*set_dma_mask)(struct device *dev, u64 mask);
 53 #ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
 54         u64 (*get_required_mask)(struct device *dev);
 55 #endif
 56         int is_phys;
 57 };
 58 
 59 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
 60 
 61 #define DMA_MASK_NONE   0x0ULL
 62 
 63 static inline int valid_dma_direction(int dma_direction)
 64 {
 65         return ((dma_direction == DMA_BIDIRECTIONAL) ||
 66                 (dma_direction == DMA_TO_DEVICE) ||
 67                 (dma_direction == DMA_FROM_DEVICE));
 68 }
 69 
 70 static inline int is_device_dma_capable(struct device *dev)
 71 {
 72         return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
 73 }
 74 
 75 #ifdef CONFIG_HAS_DMA
 76 #include <asm/dma-mapping.h>
 77 #else
 78 #include <asm-generic/dma-mapping-broken.h>
 79 #endif
 80 
 81 static inline u64 dma_get_mask(struct device *dev)
 82 {
 83         if (dev && dev->dma_mask && *dev->dma_mask)
 84                 return *dev->dma_mask;
 85         return DMA_BIT_MASK(32);
 86 }
 87 
 88 #ifdef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK
 89 int dma_set_coherent_mask(struct device *dev, u64 mask);
 90 #else
 91 static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
 92 {
 93         if (!dma_supported(dev, mask))
 94                 return -EIO;
 95         dev->coherent_dma_mask = mask;
 96         return 0;
 97 }
 98 #endif
 99 
100 extern u64 dma_get_required_mask(struct device *dev);
101 
102 static inline unsigned int dma_get_max_seg_size(struct device *dev)
103 {
104         return dev->dma_parms ? dev->dma_parms->max_segment_size : 65536;
105 }
106 
107 static inline unsigned int dma_set_max_seg_size(struct device *dev,
108                                                 unsigned int size)
109 {
110         if (dev->dma_parms) {
111                 dev->dma_parms->max_segment_size = size;
112                 return 0;
113         } else
114                 return -EIO;
115 }
116 
117 static inline unsigned long dma_get_seg_boundary(struct device *dev)
118 {
119         return dev->dma_parms ?
120                 dev->dma_parms->segment_boundary_mask : 0xffffffff;
121 }
122 
123 static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
124 {
125         if (dev->dma_parms) {
126                 dev->dma_parms->segment_boundary_mask = mask;
127                 return 0;
128         } else
129                 return -EIO;
130 }
131 
132 static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
133                                         dma_addr_t *dma_handle, gfp_t flag)
134 {
135         void *ret = dma_alloc_coherent(dev, size, dma_handle, flag);
136         if (ret)
137                 memset(ret, 0, size);
138         return ret;
139 }
140 
141 #ifdef CONFIG_HAS_DMA
142 static inline int dma_get_cache_alignment(void)
143 {
144 #ifdef ARCH_DMA_MINALIGN
145         return ARCH_DMA_MINALIGN;
146 #endif
147         return 1;
148 }
149 #endif
150 
151 /* flags for the coherent memory api */
152 #define DMA_MEMORY_MAP                  0x01
153 #define DMA_MEMORY_IO                   0x02
154 #define DMA_MEMORY_INCLUDES_CHILDREN    0x04
155 #define DMA_MEMORY_EXCLUSIVE            0x08
156 
157 #ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
158 static inline int
159 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
160                             dma_addr_t device_addr, size_t size, int flags)
161 {
162         return 0;
163 }
164 
165 static inline void
166 dma_release_declared_memory(struct device *dev)
167 {
168 }
169 
170 static inline void *
171 dma_mark_declared_memory_occupied(struct device *dev,
172                                   dma_addr_t device_addr, size_t size)
173 {
174         return ERR_PTR(-EBUSY);
175 }
176 #endif
177 
178 /*
179  * Managed DMA API
180  */
181 extern void *dmam_alloc_coherent(struct device *dev, size_t size,
182                                  dma_addr_t *dma_handle, gfp_t gfp);
183 extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
184                                dma_addr_t dma_handle);
185 extern void *dmam_alloc_noncoherent(struct device *dev, size_t size,
186                                     dma_addr_t *dma_handle, gfp_t gfp);
187 extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr,
188                                   dma_addr_t dma_handle);
189 #ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
190 extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
191                                         dma_addr_t device_addr, size_t size,
192                                         int flags);
193 extern void dmam_release_declared_memory(struct device *dev);
194 #else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
195 static inline int dmam_declare_coherent_memory(struct device *dev,
196                                 dma_addr_t bus_addr, dma_addr_t device_addr,
197                                 size_t size, gfp_t gfp)
198 {
199         return 0;
200 }
201 
202 static inline void dmam_release_declared_memory(struct device *dev)
203 {
204 }
205 #endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
206 
207 #ifndef CONFIG_HAVE_DMA_ATTRS
208 struct dma_attrs;
209 
210 #define dma_map_single_attrs(dev, cpu_addr, size, dir, attrs) \
211         dma_map_single(dev, cpu_addr, size, dir)
212 
213 #define dma_unmap_single_attrs(dev, dma_addr, size, dir, attrs) \
214         dma_unmap_single(dev, dma_addr, size, dir)
215 
216 #define dma_map_sg_attrs(dev, sgl, nents, dir, attrs) \
217         dma_map_sg(dev, sgl, nents, dir)
218 
219 #define dma_unmap_sg_attrs(dev, sgl, nents, dir, attrs) \
220         dma_unmap_sg(dev, sgl, nents, dir)
221 
222 #endif /* CONFIG_HAVE_DMA_ATTRS */
223 
224 #ifdef CONFIG_NEED_DMA_MAP_STATE
225 #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)        dma_addr_t ADDR_NAME
226 #define DEFINE_DMA_UNMAP_LEN(LEN_NAME)          __u32 LEN_NAME
227 #define dma_unmap_addr(PTR, ADDR_NAME)           ((PTR)->ADDR_NAME)
228 #define dma_unmap_addr_set(PTR, ADDR_NAME, VAL)  (((PTR)->ADDR_NAME) = (VAL))
229 #define dma_unmap_len(PTR, LEN_NAME)             ((PTR)->LEN_NAME)
230 #define dma_unmap_len_set(PTR, LEN_NAME, VAL)    (((PTR)->LEN_NAME) = (VAL))
231 #else
232 #define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)
233 #define DEFINE_DMA_UNMAP_LEN(LEN_NAME)
234 #define dma_unmap_addr(PTR, ADDR_NAME)           (0)
235 #define dma_unmap_addr_set(PTR, ADDR_NAME, VAL)  do { } while (0)
236 #define dma_unmap_len(PTR, LEN_NAME)             (0)
237 #define dma_unmap_len_set(PTR, LEN_NAME, VAL)    do { } while (0)
238 #endif
239 
240 #endif
241 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp