1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2020-2023 Intel Corporation 4 */ 5 6 #ifndef __IVPU_IPC_H__ 7 #define __IVPU_IPC_H__ 8 9 #include <linux/interrupt.h> 10 #include <linux/spinlock.h> 11 12 #include "vpu_jsm_api.h" 13 14 struct ivpu_bo; 15 16 /* VPU FW boot notification */ 17 #define IVPU_IPC_CHAN_BOOT_MSG 0x3ff 18 #define IVPU_IPC_BOOT_MSG_DATA_ADDR 0x424f4f54 19 20 /* The alignment to be used for IPC Buffers and IPC Data. */ 21 #define IVPU_IPC_ALIGNMENT 64 22 23 #define IVPU_IPC_HDR_FREE 0 24 #define IVPU_IPC_HDR_ALLOCATED 1 25 26 /** 27 * struct ivpu_ipc_hdr - The IPC message header structure, exchanged 28 * with the VPU device firmware. 29 * @data_addr: The VPU address of the payload (JSM message) 30 * @data_size: The size of the payload. 31 * @channel: The channel used. 32 * @src_node: The Node ID of the sender. 33 * @dst_node: The Node ID of the intended receiver. 34 * @status: IPC buffer usage status 35 */ 36 struct ivpu_ipc_hdr { 37 u32 data_addr; 38 u32 data_size; 39 u16 channel; 40 u8 src_node; 41 u8 dst_node; 42 u8 status; 43 } __packed __aligned(IVPU_IPC_ALIGNMENT); 44 45 struct ivpu_ipc_consumer { 46 struct list_head link; 47 u32 channel; 48 u32 tx_vpu_addr; 49 u32 request_id; 50 51 spinlock_t rx_msg_lock; /* Protects rx_msg_list */ 52 struct list_head rx_msg_list; 53 wait_queue_head_t rx_msg_wq; 54 }; 55 56 struct ivpu_ipc_info { 57 struct gen_pool *mm_tx; 58 struct ivpu_bo *mem_tx; 59 struct ivpu_bo *mem_rx; 60 61 atomic_t rx_msg_count; 62 63 spinlock_t cons_list_lock; /* Protects cons_list */ 64 struct list_head cons_list; 65 66 atomic_t request_id; 67 struct mutex lock; /* Lock on status */ 68 bool on; 69 }; 70 71 int ivpu_ipc_init(struct ivpu_device *vdev); 72 void ivpu_ipc_fini(struct ivpu_device *vdev); 73 74 void ivpu_ipc_enable(struct ivpu_device *vdev); 75 void ivpu_ipc_disable(struct ivpu_device *vdev); 76 void ivpu_ipc_reset(struct ivpu_device *vdev); 77 78 int ivpu_ipc_irq_handler(struct ivpu_device *vdev); 79 80 void ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 81 u32 channel); 82 void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons); 83 84 int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons, 85 struct ivpu_ipc_hdr *ipc_buf, struct vpu_jsm_msg *ipc_payload, 86 unsigned long timeout_ms); 87 88 int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req, 89 enum vpu_ipc_msg_type expected_resp_type, 90 struct vpu_jsm_msg *resp, u32 channel, 91 unsigned long timeout_ms); 92 93 #endif /* __IVPU_IPC_H__ */ 94