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@ti.com --- drivers/net/ti/icssg_prueth.h | 5 ++++ drivers/net/ti/icssg_queues.c | 51 +++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 drivers/net/ti/icssg_queues.c
diff --git a/drivers/net/ti/icssg_prueth.h b/drivers/net/ti/icssg_prueth.h index 26b77dd8f3..f34ab5d6d4 100644 --- a/drivers/net/ti/icssg_prueth.h +++ b/drivers/net/ti/icssg_prueth.h @@ -75,4 +75,9 @@ void icssg_config_ipg(struct prueth *prueth, int speed, int mii); int icssg_config(struct prueth *prueth); int emac_set_port_state(struct prueth *prueth, enum icssg_port_state_cmd cmd);
+/* 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/ti/icssg_queues.c b/drivers/net/ti/icssg_queues.c new file mode 100644 index 0000000000..6a95ef5d58 --- /dev/null +++ b/drivers/net/ti/icssg_queues.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 +/* ICSSG Buffer queue helpers + * + * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com + */ + +#include <dm/ofnode.h> +#include <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; +}