1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * PCC (Platform Communications Channel) methods
4 */
5
6 #ifndef _PCC_H
7 #define _PCC_H
8
9 #include <linux/mailbox_controller.h>
10 #include <linux/mailbox_client.h>
11
12 struct pcc_mbox_chan {
13 struct mbox_chan *mchan;
14 u64 shmem_base_addr;
15 u64 shmem_size;
16 u32 latency;
17 u32 max_access_rate;
18 u16 min_turnaround_time;
19 };
20
21 #define MAX_PCC_SUBSPACES 256
22 #ifdef CONFIG_PCC
23 extern struct pcc_mbox_chan *
24 pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id);
25 extern void pcc_mbox_free_channel(struct pcc_mbox_chan *chan);
26 #else
27 static inline struct pcc_mbox_chan *
28 pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
29 {
30 return ERR_PTR(-ENODEV);
31 }
32 static inline void pcc_mbox_free_channel(struct pcc_mbox_chan *chan) { }
33 #endif
34
35 #endif /* _PCC_H */
36
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