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From:   MD Danish Anwar <danishanwar@ti.com>
To:     Randy Dunlap <rdunlap@infradead.org>,
        Roger Quadros <rogerq@kernel.org>,
        Simon Horman <simon.horman@corigine.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Richard Cochran <richardcochran@gmail.com>,
        Conor Dooley <conor+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Eric Dumazet <edumazet@google.com>,
        "David S. Miller" <davem@davemloft.net>,
        MD Danish Anwar <danishanwar@ti.com>
CC:     <nm@ti.com>, <srk@ti.com>, <linux-kernel@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <netdev@vger.kernel.org>,
        <linux-omap@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v12 04/10] net: ti: icssg-prueth: Add icssg queues APIs and macros
Date:   Thu, 27 Jul 2023 16:58:21 +0530
Message-ID: <20230727112827.3977534-5-danishanwar@ti.com>
In-Reply-To: <20230727112827.3977534-1-danishanwar@ti.com>
References: <20230727112827.3977534-1-danishanwar@ti.com>
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Add icssg_queue.c file. This file introduces macros and APIs related to
ICSSG queues. These will be used by ICSSG Ethernet driver.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
---
 drivers/net/ethernet/ti/icssg/icssg_queues.c | 38 ++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 drivers/net/ethernet/ti/icssg/icssg_queues.c

diff --git a/drivers/net/ethernet/ti/icssg/icssg_queues.c b/drivers/net/ethernet/ti/icssg/icssg_queues.c
new file mode 100644
index 000000000000..2e3f7db43db7
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg/icssg_queues.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/* ICSSG Buffer queue helpers
+ *
+ * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
+ */
+
+#include <linux/regmap.h>
+#include "icssg_prueth.h"
+
+#define ICSSG_QUEUES_MAX		64
+#define ICSSG_QUEUE_OFFSET		0xd00
+#define ICSSG_QUEUE_PEEK_OFFSET		0xe00
+#define ICSSG_QUEUE_CNT_OFFSET		0xe40
+#define	ICSSG_QUEUE_RESET_OFFSET	0xf40
+
+int __maybe_unused icssg_queue_pop(struct prueth *prueth, u8 queue)
+{
+	u32 val, cnt;
+
+	if (queue >= ICSSG_QUEUES_MAX)
+		return -EINVAL;
+
+	regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, &cnt);
+	if (!cnt)
+		return -EINVAL;
+
+	regmap_read(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, &val);
+
+	return val;
+}
+
+void __maybe_unused icssg_queue_push(struct prueth *prueth, int queue, u16 addr)
+{
+	if (queue >= ICSSG_QUEUES_MAX)
+		return;
+
+	regmap_write(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, addr);
+}
-- 
2.34.1