Commit f05af3d0 authored by Sudeep Holla's avatar Sudeep Holla Committed by Huisong Li
Browse files

ACPI: PCC: Add PCC shared memory region command and status bitfields 

mainline inclusion
from mainline-v6.7-rc1
commit 55d235ebb684b993b3247740c1c8e273f8af4a54
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8GQ30
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=55d235ebb684b993b3247740c1c8e273f8af4a54

--------------------------------

Define the common macros to use when referring to various bitfields in
the PCC generic communications channel command and status fields.

Currently different drivers that need to use these bitfields have defined
these locally. This common macro is intended to consolidate and replace
those.

Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230927-pcc_defines-v2-1-0b8ffeaef2e5@arm.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent 67bbb5bd

include/acpi/pcc.h

+13 −0
Original line number Diff line number Diff line
@@ -18,7 +18,20 @@ struct pcc_mbox_chan { 
	u16 min_turnaround_time;

};



/* Generic Communications Channel Shared Memory Region */

#define PCC_SIGNATURE			0x50434300

/* Generic Communications Channel Command Field */

#define PCC_CMD_GENERATE_DB_INTR	BIT(15)

/* Generic Communications Channel Status Field */

#define PCC_STATUS_CMD_COMPLETE		BIT(0)

#define PCC_STATUS_SCI_DOORBELL		BIT(1)

#define PCC_STATUS_ERROR		BIT(2)

#define PCC_STATUS_PLATFORM_NOTIFY	BIT(3)

/* Initiator Responder Communications Channel Flags */

#define PCC_CMD_COMPLETION_NOTIFY	BIT(0)



#define MAX_PCC_SUBSPACES	256



#ifdef CONFIG_PCC

extern struct pcc_mbox_chan *

pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id);