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

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[ Upstream commit 55d235ebb6 ]

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: Sudeep Holla <sudeep.holla@arm.com>
Stable-dep-of: 7f9e19f207 ("mailbox: pcc: Check before sending MCTP PCC response ACK")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sudeep Holla
2023-09-27 17:26:10 +01:00
committed by Greg Kroah-Hartman
parent 4460b52368
commit d8c0f38208
1 changed files with 13 additions and 0 deletions
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include/acpi/pcc.h
+13
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@@ -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);