linux-kernel - [PATCH v1 09/12] soc: mediatek: cmdq: add mem move function

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Message-ID: <1574327552-11806-10-git-send-email-dennis-yc.hsieh@mediatek.com>
Date:   Thu, 21 Nov 2019 17:12:29 +0800
From:   Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Jassi Brar <jassisinghbrar@...il.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <wsd_upstream@...iatek.com>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Subject: [PATCH v1 09/12] soc: mediatek: cmdq: add mem move function

Add memory move function in cmdq helper functions which helps copy value
between physical address.

Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c |   26 ++++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  |   13 +++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 4c90fed..4235cf8 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -282,6 +282,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, dma_addr_t addr,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s);
 
+int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, phys_addr_t src_addr,
+		      phys_addr_t dst_addr)
+{
+	struct cmdq_instruction inst = { {0} };
+	const u16 dst_reg_idx = CMDQ_SPR_TEMP;
+	const u16 swap_reg_idx = CMDQ_SPR1;
+	int err;
+
+	err = cmdq_pkt_read_s(pkt, src_addr, swap_reg_idx);
+	if (err < 0)
+		return err;
+
+	err = cmdq_pkt_assign(pkt, dst_reg_idx, CMDQ_ADDR_HIGH(dst_addr));
+	if (err < 0)
+		return err;
+
+	inst.op = CMDQ_CODE_WRITE_S;
+	inst.arg_b_t = CMDQ_REG_TYPE;
+	inst.sop = dst_reg_idx;
+	inst.offset = CMDQ_ADDR_LOW(dst_addr);
+	inst.arg_b = swap_reg_idx;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_mem_move);
+
 int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event)
 {
 	struct cmdq_instruction inst = { {0} };
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index fb48d3c..b3474f2 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -13,6 +13,7 @@
 
 #define CMDQ_NO_TIMEOUT		0xffffffffu
 #define CMDQ_SPR_TEMP		0
+#define CMDQ_SPR1		1
 
 struct cmdq_pkt;
 
@@ -126,6 +127,18 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, dma_addr_t addr,
 		     u32 value, u32 mask);
 
 /**
+ * cmdq_pkt_mem_move() - append read and write commands to copy data from
+ *			 source address to destination address.
+ * @pkt:	the CMDQ packet
+ * @src_addr:	the source physical address
+ * @dst_addr:	the destination physical address
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_mem_move(struct cmdq_pkt *pkt, phys_addr_t src_addr,
+		      phys_addr_t dst_addr);
+
+/**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet
  * @event:	the desired event type to "wait and CLEAR"
-- 
1.7.9.5