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