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 <[email protected]>
Signed-off-by: MD Danish Anwar <[email protected]>
---
drivers/net/ethernet/ti/icssg/icssg_prueth.h | 5 ++
drivers/net/ethernet/ti/icssg/icssg_queues.c | 50 ++++++++++++++++++++
2 files changed, 55 insertions(+)
create mode 100644 drivers/net/ethernet/ti/icssg/icssg_queues.c
diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
index e93488a79dbf..42fdf4005010 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
@@ -209,4 +209,9 @@ int emac_set_port_state(struct prueth_emac *emac,
enum icssg_port_state_cmd state);
void icssg_config_set_speed(struct prueth_emac *emac);
+/* Buffer queue helpers */
+int icssg_queue_pop(struct prueth *prueth, u8 queue);
+void icssg_queue_push(struct prueth *prueth, int queue, u16 addr);
+u32 icssg_queue_level(struct prueth *prueth, int queue);
+
#endif /* __NET_TI_ICSSG_PRUETH_H */
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..3c34f61ad40b
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg/icssg_queues.c
@@ -0,0 +1,50 @@
+// 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);
+}
+
+u32 icssg_queue_level(struct prueth *prueth, int queue)
+{
+ u32 reg;
+
+ if (queue >= ICSSG_QUEUES_MAX)
+ return 0;
+
+ regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, ®);
+
+ return reg;
+}
--
2.34.1