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 mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl, 24 int subspace_id); 25 extern void pcc_mbox_free_channel(struct mbox_chan *chan); 26 #else 27 static inline struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl, 28 int subspace_id) 29 { 30 return ERR_PTR(-ENODEV); 31 } 32 static inline void pcc_mbox_free_channel(struct mbox_chan *chan) { } 33 #endif 34 35 #endif /* _PCC_H */ 36