This is a note to let you know that I've just added the patch titled
ACPI: PCC: Add PCC shared memory region command and status bitfields
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-pcc-add-pcc-shared-memory-region-command-and-st.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1e4eaa4ab92e9c9b056cc896f4733608baaa67c1
Author: Sudeep Holla <sudeep.holla@xxxxxxx>
Date: Wed Sep 27 17:26:10 2023 +0100
ACPI: PCC: Add PCC shared memory region command and status bitfields
[ Upstream commit 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@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230927-pcc_defines-v2-1-0b8ffeaef2e5@xxxxxxx
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
Stable-dep-of: 7f9e19f207be ("mailbox: pcc: Check before sending MCTP PCC response ACK")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/acpi/pcc.h b/include/acpi/pcc.h
index 73e806fe7ce7..9b373d172a77 100644
--- a/include/acpi/pcc.h
+++ b/include/acpi/pcc.h
@@ -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);
