crypto: caam - link_tbl rename
- rename scatterlist and link_tbl functions
- link_tbl changed to sec4_sg
- sg_to_link_tbl_one changed to dma_to_sec4_sg_one,
since no scatterlist is use
Signed-off-by: Yuan Kang <Yuan.Kang@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h
new file mode 100644
index 0000000..a6ad7a4
--- /dev/null
+++ b/drivers/crypto/caam/sg_sw_sec4.h
@@ -0,0 +1,84 @@
+/*
+ * CAAM/SEC 4.x functions for using scatterlists in caam driver
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ *
+ */
+
+struct sec4_sg_entry;
+
+/*
+ * convert single dma address to h/w link table format
+ */
+static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
+ dma_addr_t dma, u32 len, u32 offset)
+{
+ sec4_sg_ptr->ptr = dma;
+ sec4_sg_ptr->len = len;
+ sec4_sg_ptr->reserved = 0;
+ sec4_sg_ptr->buf_pool_id = 0;
+ sec4_sg_ptr->offset = offset;
+#ifdef DEBUG
+ print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
+ DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
+ sizeof(struct sec4_sg_entry), 1);
+#endif
+}
+
+/*
+ * convert scatterlist to h/w link table format
+ * but does not have final bit; instead, returns last entry
+ */
+static inline struct sec4_sg_entry *
+sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
+ struct sec4_sg_entry *sec4_sg_ptr, u32 offset)
+{
+ while (sg_count) {
+ dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg),
+ sg_dma_len(sg), offset);
+ sec4_sg_ptr++;
+ sg = sg_next(sg);
+ sg_count--;
+ }
+ return sec4_sg_ptr - 1;
+}
+
+/*
+ * convert scatterlist to h/w link table format
+ * scatterlist must have been previously dma mapped
+ */
+static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
+ struct sec4_sg_entry *sec4_sg_ptr,
+ u32 offset)
+{
+ sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
+ sec4_sg_ptr->len |= SEC4_SG_LEN_FIN;
+}
+
+/* count number of elements in scatterlist */
+static inline int __sg_count(struct scatterlist *sg_list, int nbytes)
+{
+ struct scatterlist *sg = sg_list;
+ int sg_nents = 0;
+
+ while (nbytes > 0) {
+ sg_nents++;
+ nbytes -= sg->length;
+ if (!sg_is_last(sg) && (sg + 1)->length == 0)
+ BUG(); /* Not support chaining */
+ sg = scatterwalk_sg_next(sg);
+ }
+
+ return sg_nents;
+}
+
+/* derive number of elements in scatterlist, but return 0 for 1 */
+static inline int sg_count(struct scatterlist *sg_list, int nbytes)
+{
+ int sg_nents = __sg_count(sg_list, nbytes);
+
+ if (likely(sg_nents == 1))
+ return 0;
+
+ return sg_nents;
+}