diff options
Diffstat (limited to 'include/acpi/pcc.h')
| -rw-r--r-- | include/acpi/pcc.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/acpi/pcc.h b/include/acpi/pcc.h new file mode 100644 index 0000000000..73e806fe7c --- /dev/null +++ b/include/acpi/pcc.h @@ -0,0 +1,35 @@ +/* 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 */ |