5c33d06a49
Display uses RM owned MSGQ for lending mem and irq res handles. In addition, display may need to communicate custom data between the VMs based on the value added display features that need to be supported while the trusted VM applications are active. This change introduces the MSGQ dedicated for display to establish the communication channel. Change-Id: I8d07a3eb8591364f245c37a947a9ba5457c46efb Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2020, The Linux Foundation. All rights reserved.
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*
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*/
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#ifndef __HH_MSGQ_H
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#define __HH_MSGQ_H
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#include <linux/types.h>
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#include <linux/platform_device.h>
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#include "hh_common.h"
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enum hh_msgq_label {
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HH_MSGQ_LABEL_RM,
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HH_MSGQ_LABEL_MEMBUF,
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HH_MSGQ_LABEL_DISPLAY,
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HH_MSGQ_LABEL_MAX
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};
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#define HH_MSGQ_MAX_MSG_SIZE_BYTES 240
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#define HH_MSGQ_DIRECTION_TX 0
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#define HH_MSGQ_DIRECTION_RX 1
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/* Possible flags to pass for Tx or Rx */
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#define HH_MSGQ_TX_PUSH BIT(0)
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#define HH_MSGQ_NONBLOCK BIT(32)
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#if IS_ENABLED(CONFIG_HH_MSGQ)
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void *hh_msgq_register(enum hh_msgq_label label);
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int hh_msgq_unregister(void *msgq_client_desc);
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int hh_msgq_send(void *msgq_client_desc,
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void *buff, size_t size, unsigned long flags);
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int hh_msgq_recv(void *msgq_client_desc,
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void *buff, size_t buff_size,
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size_t *recv_size, unsigned long flags);
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int hh_msgq_populate_cap_info(enum hh_msgq_label label, u64 cap_id,
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int direction, int irq);
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int hh_msgq_probe(struct platform_device *pdev, enum hh_msgq_label label);
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#else
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static inline void *hh_msgq_register(enum hh_msgq_label label)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline int hh_msgq_unregister(void *msgq_client_desc)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline int hh_msgq_send(void *msgq_client_desc,
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void *buff, size_t size, unsigned long flags)
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{
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return -EINVAL;
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}
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static inline int hh_msgq_recv(void *msgq_client_desc,
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void *buff, size_t buff_size,
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size_t *recv_size, unsigned long flags)
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{
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return -EINVAL;
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}
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static inline int hh_msgq_populate_cap_info(enum hh_msgq_label label,
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u64 cap_id,
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int direction,
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int irq)
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{
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return -EINVAL;
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}
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static inline int hh_msgq_probe(struct platform_device *pdev,
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enum hh_msgq_label label)
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{
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return -ENODEV;
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}
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#endif
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#endif
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