crypto: caam/qi2 - add skcipher algorithms

Add support to submit the following skcipher algorithms
via the DPSECI backend:
cbc({aes,des,des3_ede})
ctr(aes), rfc3686(ctr(aes))
xts(aes)
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/Kconfig

@@ -157,6 +157,7 @@ config CRYPTO_DEV_FSL_DPAA2_CAAM
 	tristate "QorIQ DPAA2 CAAM (DPSECI) driver"
 	depends on FSL_MC_DPIO
 	select CRYPTO_DEV_FSL_CAAM_COMMON
+	select CRYPTO_BLKCIPHER
 	select CRYPTO_AUTHENC
 	select CRYPTO_AEAD
 	help

drivers/crypto/caam/caamalg_qi2.h

@@ -140,6 +140,24 @@ struct aead_edesc {
 	struct dpaa2_sg_entry sgt[0];
 };
 
+/*
+ * skcipher_edesc - s/w-extended skcipher descriptor
+ * @src_nents: number of segments in input scatterlist
+ * @dst_nents: number of segments in output scatterlist
+ * @iv_dma: dma address of iv for checking continuity and link table
+ * @qm_sg_bytes: length of dma mapped qm_sg space
+ * @qm_sg_dma: I/O virtual address of h/w link table
+ * @sgt: the h/w link table, followed by IV
+ */
+struct skcipher_edesc {
+	int src_nents;
+	int dst_nents;
+	dma_addr_t iv_dma;
+	int qm_sg_bytes;
+	dma_addr_t qm_sg_dma;
+	struct dpaa2_sg_entry sgt[0];
+};
+
 /**
  * caam_flc - Flow Context (FLC)
  * @flc: Flow Context options
@@ -167,7 +185,7 @@ enum optype {
  * @flc_dma: I/O virtual address of Flow Context
  * @cbk: Callback function to invoke when job is completed
  * @ctx: arbit context attached with request by the application
- * @edesc: extended descriptor; points to aead_edesc
+ * @edesc: extended descriptor; points to one of {skcipher,aead}_edesc
  */
 struct caam_request {
 	struct dpaa2_fl_entry fd_flt[2];