linux-kernel - [PATCH v5 06/10] soc: mediatek: cmdq: Add cmdq_pkt_finalize

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240403102602.32155-7-shawn.sung@mediatek.com>
Date: Wed, 3 Apr 2024 18:25:58 +0800
From: Shawn Sung <shawn.sung@...iatek.com>
To: CK Hu <ck.hu@...iatek.com>, Jassi Brar <jassisinghbrar@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
CC: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>, Hsiao Chien Sung
	<shawn.sung@...iatek.com>, "Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
	Houlong Wei <houlong.wei@...iatek.com>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>
Subject: [PATCH v5 06/10] soc: mediatek: cmdq: Add cmdq_pkt_finalize_loop for looping cmd with irq

From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>

Add cmdq_pkt_finalize_loop to CMDQ driver.

cmdq_pkt_finalize_loop appends end of command(EOC) instruction and
jump to start of command buffer instruction to make the command
buffer loopable.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
Signed-off-by: Hsiao Chien Sung <shawn.sung@...iatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 23 +++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  |  8 ++++++++
 2 files changed, 31 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 42a0194198d5b..3e5a9c4592fd0 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -568,6 +568,29 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
 }
 EXPORT_SYMBOL(cmdq_pkt_finalize);
 
+int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt)
+{
+	struct cmdq_instruction inst = { {0} };
+	int err;
+
+	/* insert EOC and generate IRQ for each command iteration */
+	inst.op = CMDQ_CODE_EOC;
+	inst.value = CMDQ_EOC_IRQ_EN;
+	err = cmdq_pkt_append_command(pkt, inst);
+	if (err < 0)
+		return err;
+
+	/* JUMP to start of pkt */
+	err = cmdq_pkt_jump(pkt, pkt->pa_base);
+	if (err < 0)
+		return err;
+
+	pkt->loop = true;
+
+	return err;
+}
+EXPORT_SYMBOL(cmdq_pkt_finalize_loop);
+
 int cmdq_pkt_flush_async(struct cmdq_pkt *pkt)
 {
 	int err;
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 7bd77d40a5720..f986117d930c0 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -371,6 +371,14 @@ int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr);
  */
 int cmdq_pkt_finalize(struct cmdq_pkt *pkt);
 
+/**
+ * cmdq_pkt_finalize_loop() - Append EOC and jump to start command.
+ * @pkt:	the CMDQ packet
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt);
+
 /**
  * cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
  *                          packet and call back at the end of done packet
-- 
2.18.0