Commit b8d5008f authored by MD Danish Anwar's avatar MD Danish Anwar Committed by David S. Miller
Browse files

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.

Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarMD Danish Anwar <danishanwar@ti.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent e9b4ece7

drivers/net/ethernet/ti/icssg/icssg_prueth.h

+5 −0
Original line number Diff line number Diff line
@@ -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 */

drivers/net/ethernet/ti/icssg/icssg_queues.c

0 → 100644
+50 −0
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// 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, &reg);



	return reg;

}