1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2020-2023 Intel Corporation
9 #include <linux/interrupt.h>
10 #include <linux/spinlock.h>
12 #include "vpu_jsm_api.h"
16 /* VPU FW boot notification */
17 #define IVPU_IPC_CHAN_BOOT_MSG 0x3ff
18 #define IVPU_IPC_BOOT_MSG_DATA_ADDR 0x424f4f54
20 /* The alignment to be used for IPC Buffers and IPC Data. */
21 #define IVPU_IPC_ALIGNMENT 64
23 #define IVPU_IPC_HDR_FREE 0
24 #define IVPU_IPC_HDR_ALLOCATED 1
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
43 } __packed __aligned(IVPU_IPC_ALIGNMENT);
45 typedef void (*ivpu_ipc_rx_callback_t)(struct ivpu_device *vdev,
46 struct ivpu_ipc_hdr *ipc_hdr,
47 struct vpu_jsm_msg *jsm_msg);
49 struct ivpu_ipc_rx_msg {
50 struct list_head link;
51 struct ivpu_ipc_hdr *ipc_hdr;
52 struct vpu_jsm_msg *jsm_msg;
53 ivpu_ipc_rx_callback_t callback;
56 struct ivpu_ipc_consumer {
57 struct list_head link;
62 ivpu_ipc_rx_callback_t rx_callback;
64 spinlock_t rx_lock; /* Protects rx_msg_list and aborted */
65 struct list_head rx_msg_list;
66 wait_queue_head_t rx_msg_wq;
69 struct ivpu_ipc_info {
70 struct gen_pool *mm_tx;
71 struct ivpu_bo *mem_tx;
72 struct ivpu_bo *mem_rx;
74 atomic_t rx_msg_count;
76 spinlock_t cons_lock; /* Protects cons_list and cb_msg_list */
77 struct list_head cons_list;
78 struct list_head cb_msg_list;
81 struct mutex lock; /* Lock on status */
85 int ivpu_ipc_init(struct ivpu_device *vdev);
86 void ivpu_ipc_fini(struct ivpu_device *vdev);
88 void ivpu_ipc_enable(struct ivpu_device *vdev);
89 void ivpu_ipc_disable(struct ivpu_device *vdev);
90 void ivpu_ipc_reset(struct ivpu_device *vdev);
92 void ivpu_ipc_irq_handler(struct ivpu_device *vdev, bool *wake_thread);
93 irqreturn_t ivpu_ipc_irq_thread_handler(struct ivpu_device *vdev);
95 void ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
96 u32 channel, ivpu_ipc_rx_callback_t callback);
97 void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons);
99 int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
100 struct ivpu_ipc_hdr *ipc_buf, struct vpu_jsm_msg *jsm_msg,
101 unsigned long timeout_ms);
103 int ivpu_ipc_send_receive_active(struct ivpu_device *vdev, struct vpu_jsm_msg *req,
104 enum vpu_ipc_msg_type expected_resp, struct vpu_jsm_msg *resp,
105 u32 channel, unsigned long timeout_ms);
106 int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req,
107 enum vpu_ipc_msg_type expected_resp, struct vpu_jsm_msg *resp,
108 u32 channel, unsigned long timeout_ms);
110 #endif /* __IVPU_IPC_H__ */