1/* SPDX-License-Identifier: GPL-2.0+ */
2/* Copyright (c) 2015-2016 Quantenna Communications. All rights reserved. */
3
4#ifndef _QTN_FMAC_SHM_IPC_H_
5#define _QTN_FMAC_SHM_IPC_H_
6
7#include <linux/workqueue.h>
8#include <linux/completion.h>
9#include <linux/mutex.h>
10#include <linux/spinlock.h>
11
12#include "shm_ipc_defs.h"
13
14#define QTN_SHM_IPC_ACK_TIMEOUT		(2 * HZ)
15
16struct qtnf_shm_ipc_int {
17	void (*fn)(void *arg);
18	void *arg;
19};
20
21struct qtnf_shm_ipc_rx_callback {
22	void (*fn)(void *arg, const u8 __iomem *buf, size_t len);
23	void *arg;
24};
25
26enum qtnf_shm_ipc_direction {
27	QTNF_SHM_IPC_OUTBOUND		= BIT(0),
28	QTNF_SHM_IPC_INBOUND		= BIT(1),
29};
30
31struct qtnf_shm_ipc {
32	struct qtnf_shm_ipc_region __iomem *shm_region;
33	enum qtnf_shm_ipc_direction direction;
34	size_t tx_packet_count;
35	size_t rx_packet_count;
36
37	size_t tx_timeout_count;
38
39	u8 waiting_for_ack;
40
41	struct qtnf_shm_ipc_int interrupt;
42	struct qtnf_shm_ipc_rx_callback rx_callback;
43
44	void (*irq_handler)(struct qtnf_shm_ipc *ipc);
45
46	struct workqueue_struct *workqueue;
47	struct work_struct irq_work;
48	struct completion tx_completion;
49};
50
51int qtnf_shm_ipc_init(struct qtnf_shm_ipc *ipc,
52		      enum qtnf_shm_ipc_direction direction,
53		      struct qtnf_shm_ipc_region __iomem *shm_region,
54		      struct workqueue_struct *workqueue,
55		      const struct qtnf_shm_ipc_int *interrupt,
56		      const struct qtnf_shm_ipc_rx_callback *rx_callback);
57void qtnf_shm_ipc_free(struct qtnf_shm_ipc *ipc);
58int qtnf_shm_ipc_send(struct qtnf_shm_ipc *ipc, const u8 *buf, size_t size);
59
60static inline void qtnf_shm_ipc_irq_handler(struct qtnf_shm_ipc *ipc)
61{
62	ipc->irq_handler(ipc);
63}
64
65#endif /* _QTN_FMAC_SHM_IPC_H_ */
66