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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* PCC (Platform Communications Channel) methods
*/
#ifndef _PCC_H
#define _PCC_H
#include <linux/mailbox_controller.h>
#include <linux/mailbox_client.h>
struct pcc_mbox_chan {
struct mbox_chan *mchan;
u64 shmem_base_addr;
u64 shmem_size;
u32 latency;
u32 max_access_rate;
u16 min_turnaround_time;
};
#define MAX_PCC_SUBSPACES 256
#ifdef CONFIG_PCC
extern struct pcc_mbox_chan *
pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id);
extern void pcc_mbox_free_channel(struct pcc_mbox_chan *chan);
#else
static inline struct pcc_mbox_chan *
pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
{
return ERR_PTR(-ENODEV);
}
static inline void pcc_mbox_free_channel(struct pcc_mbox_chan *chan) { }
#endif
#endif /* _PCC_H */