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b8d5008f8c
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> Signed-off-by: David S. Miller <davem@davemloft.net>
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* ICSSG Buffer queue helpers
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*
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* Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
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*/
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#include <linux/regmap.h>
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#include "icssg_prueth.h"
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#define ICSSG_QUEUES_MAX 64
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#define ICSSG_QUEUE_OFFSET 0xd00
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#define ICSSG_QUEUE_PEEK_OFFSET 0xe00
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#define ICSSG_QUEUE_CNT_OFFSET 0xe40
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#define ICSSG_QUEUE_RESET_OFFSET 0xf40
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int icssg_queue_pop(struct prueth *prueth, u8 queue)
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{
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u32 val, cnt;
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if (queue >= ICSSG_QUEUES_MAX)
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return -EINVAL;
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regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, &cnt);
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if (!cnt)
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return -EINVAL;
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regmap_read(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, &val);
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return val;
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}
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void icssg_queue_push(struct prueth *prueth, int queue, u16 addr)
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{
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if (queue >= ICSSG_QUEUES_MAX)
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return;
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regmap_write(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, addr);
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}
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u32 icssg_queue_level(struct prueth *prueth, int queue)
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{
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u32 reg;
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if (queue >= ICSSG_QUEUES_MAX)
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return 0;
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regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, ®);
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return reg;
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}
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