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 | |
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 | |