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 
16 struct qtnf_shm_ipc_int {
17 	void (*fn)(void *arg);
18 	void *arg;
19 };
20 
21 struct qtnf_shm_ipc_rx_callback {
22 	void (*fn)(void *arg, const u8 __iomem *buf, size_t len);
23 	void *arg;
24 };
25 
26 enum qtnf_shm_ipc_direction {
27 	QTNF_SHM_IPC_OUTBOUND		= BIT(0),
28 	QTNF_SHM_IPC_INBOUND		= BIT(1),
29 };
30 
31 struct 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 
51 int 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);
57 void qtnf_shm_ipc_free(struct qtnf_shm_ipc *ipc);
58 int qtnf_shm_ipc_send(struct qtnf_shm_ipc *ipc, const u8 *buf, size_t size);
59 
qtnf_shm_ipc_irq_handler(struct qtnf_shm_ipc * ipc)60 static 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