linux-kernel - [PATCH 1/5] soc: mediatek: mtk-cmdq: Add specific purpose register definitions for GCE

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Message-ID: <20240301111126.22035-2-jason-jh.lin@mediatek.com>
Date: Fri, 1 Mar 2024 19:11:22 +0800
From: Jason-JH.Lin <jason-jh.lin@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Chun-Kuang Hu
	<chunkuang.hu@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>
CC: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Jason-ch Chen <jason-ch.chen@...iatek.com>, "Jason-JH . Lin"
	<jason-jh.lin@...iatek.com>, Singo Chang <singo.chang@...iatek.com>, Nancy
 Lin <nancy.lin@...iatek.com>, Shawn Sung <shawn.sung@...iatek.com>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH 1/5] soc: mediatek: mtk-cmdq: Add specific purpose register definitions for GCE

Add specific purpose register definitions for GCE, so CMDQ users can
use them as a buffer to store data.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
Change-Id: Ie72dd86d6ccfb60761461ad128b02d32adaacbc0
---
 include/linux/soc/mediatek/mtk-cmdq.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 649955d2cf5c..1dae80185f9f 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -14,6 +14,15 @@
 #define CMDQ_ADDR_HIGH(addr)	((u32)(((addr) >> 16) & GENMASK(31, 0)))
 #define CMDQ_ADDR_LOW(addr)	((u16)(addr) | BIT(1))
 
+/*
+ * Every cmdq thread has its own SPRs (Specific Purpose Registers),
+ * so there are 4 * N (threads) SPRs in GCE that shares the same indexes below.
+ */
+#define CMDQ_THR_SPR_IDX0	(0)
+#define CMDQ_THR_SPR_IDX1	(1)
+#define CMDQ_THR_SPR_IDX2	(2)
+#define CMDQ_THR_SPR_IDX3	(3)
+
 struct cmdq_pkt;
 
 struct cmdq_client_reg {
-- 
2.18.0