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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2020-2023 Intel Corporation
*/
#ifndef __IVPU_IPC_H__
#define __IVPU_IPC_H__
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include "vpu_jsm_api.h"
struct ivpu_bo;
/* VPU FW boot notification */
#define IVPU_IPC_CHAN_BOOT_MSG 0x3ff
#define IVPU_IPC_BOOT_MSG_DATA_ADDR 0x424f4f54
/* The alignment to be used for IPC Buffers and IPC Data. */
#define IVPU_IPC_ALIGNMENT 64
#define IVPU_IPC_HDR_FREE 0
#define IVPU_IPC_HDR_ALLOCATED 1
/**
* struct ivpu_ipc_hdr - The IPC message header structure, exchanged
* with the VPU device firmware.
* @data_addr: The VPU address of the payload (JSM message)
* @data_size: The size of the payload.
* @channel: The channel used.
* @src_node: The Node ID of the sender.
* @dst_node: The Node ID of the intended receiver.
* @status: IPC buffer usage status
*/
struct ivpu_ipc_hdr {
u32 data_addr;
u32 data_size;
u16 channel;
u8 src_node;
u8 dst_node;
u8 status;
} __packed __aligned(IVPU_IPC_ALIGNMENT);
struct ivpu_ipc_consumer {
struct list_head link;
u32 channel;
u32 tx_vpu_addr;
u32 request_id;
spinlock_t rx_msg_lock; /* Protects rx_msg_list */
struct list_head rx_msg_list;
wait_queue_head_t rx_msg_wq;
};
struct ivpu_ipc_info {
struct gen_pool *mm_tx;
struct ivpu_bo *mem_tx;
struct ivpu_bo *mem_rx;
atomic_t rx_msg_count;
spinlock_t cons_list_lock; /* Protects cons_list */
struct list_head cons_list;
atomic_t request_id;
struct mutex lock; /* Lock on status */
bool on;
};
int ivpu_ipc_init(struct ivpu_device *vdev);
void ivpu_ipc_fini(struct ivpu_device *vdev);
void ivpu_ipc_enable(struct ivpu_device *vdev);
void ivpu_ipc_disable(struct ivpu_device *vdev);
void ivpu_ipc_reset(struct ivpu_device *vdev);
int ivpu_ipc_irq_handler(struct ivpu_device *vdev);
void ivpu_ipc_consumer_add(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
u32 channel);
void ivpu_ipc_consumer_del(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons);
int ivpu_ipc_receive(struct ivpu_device *vdev, struct ivpu_ipc_consumer *cons,
struct ivpu_ipc_hdr *ipc_buf, struct vpu_jsm_msg *ipc_payload,
unsigned long timeout_ms);
int ivpu_ipc_send_receive(struct ivpu_device *vdev, struct vpu_jsm_msg *req,
enum vpu_ipc_msg_type expected_resp_type,
struct vpu_jsm_msg *resp, u32 channel,
unsigned long timeout_ms);
#endif /* __IVPU_IPC_H__ */
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