linux-kernel - [PATCH v3 9/9] mailbox: mediatek: Add secure CMDQ driver support for CMDQ driver

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20231222045228.27826-10-jason-jh.lin@mediatek.com>
Date: Fri, 22 Dec 2023 12:52:28 +0800
From: Jason-JH.Lin <jason-jh.lin@...iatek.com>
To: Jassi Brar <jassisinghbrar@...il.com>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Chun-Kuang Hu
	<chunkuang.hu@...nel.org>
CC: Conor Dooley <conor+dt@...nel.org>, Mauro Carvalho Chehab
	<mchehab@...nel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-media@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	Jason-ch Chen <jason-ch.chen@...iatek.com>, Johnson Wang
	<johnson.wang@...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>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v3 9/9] mailbox: mediatek: Add secure CMDQ driver support for CMDQ driver

CMDQ driver will probe a secure CMDQ driver when has_sec flag
in platform data is true and its device node in dts has defined a
event id of CMDQ_SYNC_TOKEN_SEC_EOF.

Secure CMDQ driver support on mt8188 and mt8195 currently.
So add a has_secure flag to their driver data to probe it.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@...iatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c | 38 ++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 04321f7e10c3..79167696c1eb 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -15,6 +15,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/mailbox_controller.h>
 #include <linux/mailbox/mtk-cmdq-mailbox.h>
+#include <linux/mailbox/mtk-cmdq-sec-mailbox.h>
 #include <linux/of.h>
 
 #define CMDQ_MBOX_AUTOSUSPEND_DELAY_MS	100
@@ -60,6 +61,9 @@ struct gce_plat {
 	u8 shift;
 	bool control_by_sw;
 	bool sw_ddr_en;
+	bool has_secure;
+	u32 secure_thread_nr;
+	u32 secure_thread_min;
 	u32 gce_num;
 };
 
@@ -570,6 +574,7 @@ static int cmdq_probe(struct platform_device *pdev)
 	int alias_id = 0;
 	static const char * const clk_name = "gce";
 	static const char * const clk_names[] = { "gce0", "gce1" };
+	u32 hwid = 0;
 
 	cmdq = devm_kzalloc(dev, sizeof(*cmdq), GFP_KERNEL);
 	if (!cmdq)
@@ -595,6 +600,8 @@ static int cmdq_probe(struct platform_device *pdev)
 		dev, cmdq->base, cmdq->irq);
 
 	if (cmdq->pdata->gce_num > 1) {
+		hwid = of_alias_get_id(dev->of_node, clk_name);
+
 		for_each_child_of_node(phandle->parent, node) {
 			alias_id = of_alias_get_id(node, clk_name);
 			if (alias_id >= 0 && alias_id < cmdq->pdata->gce_num) {
@@ -677,6 +684,31 @@ static int cmdq_probe(struct platform_device *pdev)
 	pm_runtime_set_autosuspend_delay(dev, CMDQ_MBOX_AUTOSUSPEND_DELAY_MS);
 	pm_runtime_use_autosuspend(dev);
 
+	if (cmdq->pdata->has_secure) {
+		struct platform_device *mtk_cmdq_sec;
+		static struct gce_sec_plat sec_plat = {0};
+
+		if (of_property_read_u32_index(dev->of_node, "mediatek,gce-events", 0,
+					       &sec_plat.cmdq_event) == 0) {
+			sec_plat.gce_dev = dev;
+			sec_plat.hwid = hwid;
+			sec_plat.gce_num = cmdq->pdata->gce_num;
+			sec_plat.clocks = cmdq->clocks;
+			sec_plat.thread_nr = cmdq->pdata->thread_nr;
+			sec_plat.secure_thread_nr = cmdq->pdata->secure_thread_nr;
+			sec_plat.secure_thread_min = cmdq->pdata->secure_thread_min;
+
+			mtk_cmdq_sec = platform_device_register_data(dev, "mtk-cmdq-sec",
+								     PLATFORM_DEVID_AUTO,
+								     &sec_plat,
+								     sizeof(sec_plat));
+			if (IS_ERR(mtk_cmdq_sec)) {
+				dev_err(dev, "failed to register platform_device mtk-cmdq-sec\n");
+				return PTR_ERR(mtk_cmdq_sec);
+			}
+		}
+	}
+
 	return 0;
 }
 
@@ -720,6 +752,9 @@ static const struct gce_plat gce_plat_mt8188 = {
 	.thread_nr = 32,
 	.shift = 3,
 	.control_by_sw = true,
+	.has_secure = true,
+	.secure_thread_nr = 2,
+	.secure_thread_min = 8,
 	.gce_num = 2
 };
 
@@ -734,6 +769,9 @@ static const struct gce_plat gce_plat_mt8195 = {
 	.thread_nr = 24,
 	.shift = 3,
 	.control_by_sw = true,
+	.has_secure = true,
+	.secure_thread_nr = 2,
+	.secure_thread_min = 8,
 	.gce_num = 2
 };
 
-- 
2.18.0