mlxsw: Convert resources into array

Since the number of resources is going to get much bigger, ease up the
addition by simly defining IDs. Convert the existing structure members
to a set array, one for validity, one for values. Introduce a set of
getters and setters for easy access.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/resources.h b/drivers/net/ethernet/mellanox/mlxsw/resources.h
new file mode 100644
index 000000000000..a031e45c8b06
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxsw/resources.h
@@ -0,0 +1,121 @@
+/*
+ * drivers/net/ethernet/mellanox/mlxsw/resources.h
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the names of the copyright holders nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * 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 _MLXSW_RESOURCES_H
+#define _MLXSW_RESOURCES_H
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+enum mlxsw_res_id {
+	MLXSW_RES_ID_KVD_SIZE,
+	MLXSW_RES_ID_KVD_SINGLE_MIN_SIZE,
+	MLXSW_RES_ID_KVD_DOUBLE_MIN_SIZE,
+	MLXSW_RES_ID_MAX_SPAN,
+	MLXSW_RES_ID_MAX_SYSTEM_PORT,
+	MLXSW_RES_ID_MAX_LAG,
+	MLXSW_RES_ID_MAX_LAG_MEMBERS,
+	MLXSW_RES_ID_MAX_VRS,
+	MLXSW_RES_ID_MAX_RIFS,
+
+	/* Internal resources.
+	 * Determined by the SW, not queried from the HW.
+	 */
+	MLXSW_RES_ID_KVD_SINGLE_SIZE,
+	MLXSW_RES_ID_KVD_DOUBLE_SIZE,
+	MLXSW_RES_ID_KVD_LINEAR_SIZE,
+
+	__MLXSW_RES_ID_MAX,
+};
+
+static u16 mlxsw_res_ids[] = {
+	[MLXSW_RES_ID_KVD_SIZE] = 0x1001,
+	[MLXSW_RES_ID_KVD_SINGLE_MIN_SIZE] = 0x1002,
+	[MLXSW_RES_ID_KVD_DOUBLE_MIN_SIZE] = 0x1003,
+	[MLXSW_RES_ID_MAX_SPAN] = 0x2420,
+	[MLXSW_RES_ID_MAX_SYSTEM_PORT] = 0x2502,
+	[MLXSW_RES_ID_MAX_LAG] = 0x2520,
+	[MLXSW_RES_ID_MAX_LAG_MEMBERS] = 0x2521,
+	[MLXSW_RES_ID_MAX_VRS] = 0x2C01,
+	[MLXSW_RES_ID_MAX_RIFS] = 0x2C02,
+};
+
+struct mlxsw_res {
+	bool valid[__MLXSW_RES_ID_MAX];
+	u64 values[__MLXSW_RES_ID_MAX];
+};
+
+static inline bool mlxsw_res_valid(struct mlxsw_res *res,
+				   enum mlxsw_res_id res_id)
+{
+	return res->valid[res_id];
+}
+
+#define MLXSW_RES_VALID(res, short_res_id)			\
+	mlxsw_res_valid(res, MLXSW_RES_ID_##short_res_id)
+
+static inline u64 mlxsw_res_get(struct mlxsw_res *res,
+				enum mlxsw_res_id res_id)
+{
+	if (WARN_ON(!res->valid[res_id]))
+		return 0;
+	return res->values[res_id];
+}
+
+#define MLXSW_RES_GET(res, short_res_id)			\
+	mlxsw_res_get(res, MLXSW_RES_ID_##short_res_id)
+
+static inline void mlxsw_res_set(struct mlxsw_res *res,
+				 enum mlxsw_res_id res_id, u64 value)
+{
+	res->valid[res_id] = true;
+	res->values[res_id] = value;
+}
+
+#define MLXSW_RES_SET(res, short_res_id, value)			\
+	mlxsw_res_set(res, MLXSW_RES_ID_##short_res_id, value)
+
+static inline void mlxsw_res_parse(struct mlxsw_res *res, u16 id, u64 value)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mlxsw_res_ids); i++) {
+		if (mlxsw_res_ids[i] == id) {
+			mlxsw_res_set(res, i, value);
+			return;
+		}
+	}
+}
+
+#endif