[dpdk-dev] [PATCH v2 06/27] cryptodev: add crypto op helper macros
Pablo de Lara
pablo.de.lara.guarch at intel.com
Mon Jun 26 12:22:39 CEST 2017
In order to facilitate the access to the private data,
after the crypto operation, two new macros have been
implemented:
- rte_crypto_op_ctod_offset(c,t,o), which returns a pointer
to "o" bytes after the start of the crypto operation
(rte_crypto_op)
- rte_crypto_op_ctophys_offset(c, o), which returns
the physical address of the data "o" bytes after the
start of the crypto operation (rte_crypto_op)
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
---
lib/librte_cryptodev/rte_cryptodev.h | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h
index 4e318f0..91f3375 100644
--- a/lib/librte_cryptodev/rte_cryptodev.h
+++ b/lib/librte_cryptodev/rte_cryptodev.h
@@ -119,6 +119,38 @@ extern const char **rte_cyptodev_names;
#define CDEV_PMD_TRACE(...) (void)0
#endif
+
+
+/**
+ * A macro that points to an offset from the start
+ * of the crypto operation structure (rte_crypto_op)
+ *
+ * The returned pointer is cast to type t.
+ *
+ * @param c
+ * The crypto operation.
+ * @param o
+ * The offset from the start of the crypto operation.
+ * @param t
+ * The type to cast the result into.
+ */
+#define rte_crypto_op_ctod_offset(c, t, o) \
+ ((t)((char *)(c) + (o)))
+
+/**
+ * A macro that returns the physical address that points
+ * to an offset from the start of the crypto operation
+ * (rte_crypto_op)
+ *
+ * @param c
+ * The crypto operation.
+ * @param o
+ * The offset from the start of the crypto operation
+ * to calculate address from.
+ */
+#define rte_crypto_op_ctophys_offset(c, o) \
+ (phys_addr_t)((c)->phys_addr + (o))
+
/**
* Crypto parameters range description
*/
--
2.9.4
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