net/szedata2: refactor ibuf and obuf address definition

[dpdk.git] / drivers / net / szedata2 / szedata2_iobuf.h

diff --git a/drivers/net/szedata2/szedata2_iobuf.h b/drivers/net/szedata2/szedata2_iobuf.h
new file mode 100644 (file)
index 0000000..3ae4367
--- /dev/null
+++ b/drivers/net/szedata2/szedata2_iobuf.h
@@ -0,0 +1,95 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) 2017 CESNET
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of CESNET nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SZEDATA2_IOBUF_H_
+#define _SZEDATA2_IOBUF_H_
+
+#include <stdint.h>
+
+#include <rte_dev.h>
+
+/* IBUF offsets from the beginning of the PCI resource address space. */
+extern const uint32_t szedata2_ibuf_base_table[];
+extern const uint32_t szedata2_ibuf_count;
+
+/* OBUF offsets from the beginning of the PCI resource address space. */
+extern const uint32_t szedata2_obuf_base_table[];
+extern const uint32_t szedata2_obuf_count;
+
+/**
+ * Macro takes pointer to pci resource structure (rsc)
+ * and returns pointer to mapped resource memory at
+ * specified offset (offset) typecast to the type (type).
+ */
+#define SZEDATA2_PCI_RESOURCE_PTR(rsc, offset, type) \
+       ((type)(((uint8_t *)(rsc)->addr) + (offset)))
+
+/**
+ * Get pointer to IBUF structure according to specified index.
+ *
+ * @param rsc
+ *     Pointer to base address of memory resource.
+ * @param index
+ *     Index of IBUF.
+ * @return
+ *     Pointer to IBUF structure.
+ */
+static inline struct szedata2_ibuf *
+ibuf_ptr_by_index(struct rte_mem_resource *rsc, uint32_t index)
+{
+       if (index >= szedata2_ibuf_count)
+               index = szedata2_ibuf_count - 1;
+       return SZEDATA2_PCI_RESOURCE_PTR(rsc, szedata2_ibuf_base_table[index],
+               struct szedata2_ibuf *);
+}
+
+/**
+ * Get pointer to OBUF structure according to specified idnex.
+ *
+ * @param rsc
+ *     Pointer to base address of memory resource.
+ * @param index
+ *     Index of OBUF.
+ * @return
+ *     Pointer to OBUF structure.
+ */
+static inline struct szedata2_obuf *
+obuf_ptr_by_index(struct rte_mem_resource *rsc, uint32_t index)
+{
+       if (index >= szedata2_obuf_count)
+               index = szedata2_obuf_count - 1;
+       return SZEDATA2_PCI_RESOURCE_PTR(rsc, szedata2_obuf_base_table[index],
+               struct szedata2_obuf *);
+}
+
+#endif /* _SZEDATA2_IOBUF_H_ */