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path: root/drivers/crypto/caam/sg_sw_sec4.h
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-rw-r--r--drivers/crypto/caam/sg_sw_sec4.h54
1 files changed, 0 insertions, 54 deletions
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h
index b12ff85f4241..ce28a563effc 100644
--- a/drivers/crypto/caam/sg_sw_sec4.h
+++ b/drivers/crypto/caam/sg_sw_sec4.h
@@ -116,57 +116,3 @@ static int dma_unmap_sg_chained(struct device *dev, struct scatterlist *sg,
116 } 116 }
117 return nents; 117 return nents;
118} 118}
119
120/* Map SG page in kernel virtual address space and copy */
121static inline void sg_map_copy(u8 *dest, struct scatterlist *sg,
122 int len, int offset)
123{
124 u8 *mapped_addr;
125
126 /*
127 * Page here can be user-space pinned using get_user_pages
128 * Same must be kmapped before use and kunmapped subsequently
129 */
130 mapped_addr = kmap_atomic(sg_page(sg));
131 memcpy(dest, mapped_addr + offset, len);
132 kunmap_atomic(mapped_addr);
133}
134
135/* Copy from len bytes of sg to dest, starting from beginning */
136static inline void sg_copy(u8 *dest, struct scatterlist *sg, unsigned int len)
137{
138 struct scatterlist *current_sg = sg;
139 int cpy_index = 0, next_cpy_index = current_sg->length;
140
141 while (next_cpy_index < len) {
142 sg_map_copy(dest + cpy_index, current_sg, current_sg->length,
143 current_sg->offset);
144 current_sg = scatterwalk_sg_next(current_sg);
145 cpy_index = next_cpy_index;
146 next_cpy_index += current_sg->length;
147 }
148 if (cpy_index < len)
149 sg_map_copy(dest + cpy_index, current_sg, len-cpy_index,
150 current_sg->offset);
151}
152
153/* Copy sg data, from to_skip to end, to dest */
154static inline void sg_copy_part(u8 *dest, struct scatterlist *sg,
155 int to_skip, unsigned int end)
156{
157 struct scatterlist *current_sg = sg;
158 int sg_index, cpy_index, offset;
159
160 sg_index = current_sg->length;
161 while (sg_index <= to_skip) {
162 current_sg = scatterwalk_sg_next(current_sg);
163 sg_index += current_sg->length;
164 }
165 cpy_index = sg_index - to_skip;
166 offset = current_sg->offset + current_sg->length - cpy_index;
167 sg_map_copy(dest, current_sg, cpy_index, offset);
168 if (end - sg_index) {
169 current_sg = scatterwalk_sg_next(current_sg);
170 sg_copy(dest + cpy_index, current_sg, end - sg_index);
171 }
172}