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Message-ID: <20230724112934.2637802-5-danishanwar@ti.com>
Date: Mon, 24 Jul 2023 16:59:28 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Randy Dunlap <rdunlap@...radead.org>,
Roger Quadros <rogerq@...nel.org>,
Simon Horman <simon.horman@...igine.com>,
Vignesh Raghavendra <vigneshr@...com>,
Andrew Lunn <andrew@...n.ch>,
Richard Cochran <richardcochran@...il.com>,
Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
"David S. Miller" <davem@...emloft.net>,
MD Danish Anwar <danishanwar@...com>
CC: <nm@...com>, <srk@...com>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v11 04/10] net: ti: icssg-prueth: Add icssg queues APIs and macros
Add icssg_queue.c file. This file introduces macros and APIs related to
ICSSG queues. These will be used by ICSSG Ethernet driver.
Signed-off-by: MD Danish Anwar <danishanwar@...com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/ethernet/ti/icssg_queues.c | 38 ++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 drivers/net/ethernet/ti/icssg_queues.c
diff --git a/drivers/net/ethernet/ti/icssg_queues.c b/drivers/net/ethernet/ti/icssg_queues.c
new file mode 100644
index 000000000000..1c2b92dbcb59
--- /dev/null
+++ b/drivers/net/ethernet/ti/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 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 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
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