linux-kernel - [PATCH v2 05/10] soc: mediatek: cmdq: move the CMDQ_IRQ

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: <1551865835-50974-6-git-send-email-bibby.hsieh@mediatek.com>
Date:   Wed, 6 Mar 2019 17:50:30 +0800
From:   Bibby Hsieh <bibby.hsieh@...iatek.com>
To:     Jassi Brar <jassisinghbrar@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>, CK HU <ck.hu@...iatek.com>
CC:     Daniel Kurtz <djkurtz@...omium.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Nicolas Boichat <drinkcat@...omium.org>,
        Bibby Hsieh <bibby.hsieh@...iatek.com>,
        YT Shen <yt.shen@...iatek.com>,
        Daoyuan Huang <daoyuan.huang@...iatek.com>,
        Jiaguang Zhang <jiaguang.zhang@...iatek.com>,
        Dennis-YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        <ginny.chen@...iatek.com>, <kendrick.hsu@...iatek.com>,
        Frederic Chen <Frederic.Chen@...iatek.com>
Subject: [PATCH v2 05/10] soc: mediatek: cmdq: move the CMDQ_IRQ_MASK into cmdq driver data

The interrupt mask and thread number has positive correlation,
so we move the CMDQ_IRQ_MASK into cmdq driver data and calculate
it by thread number.

Signed-off-by: Bibby Hsieh <bibby.hsieh@...iatek.com>
---
 drivers/mailbox/mtk-cmdq-mailbox.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 909eb23..6db1e2d 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -17,7 +17,6 @@
 #include <linux/of_device.h>
 
 #define CMDQ_OP_CODE_MASK		(0xff << CMDQ_OP_CODE_SHIFT)
-#define CMDQ_IRQ_MASK			0xffff
 #define CMDQ_NUM_CMD(t)			(t->cmd_buf_size / CMDQ_INST_SIZE)
 
 #define CMDQ_CURR_IRQ_STATUS		0x10
@@ -71,6 +70,7 @@ struct cmdq {
 	void __iomem		*base;
 	u32			irq;
 	u32			thread_nr;
+	u32			irq_mask;
 	struct cmdq_thread	*thread;
 	struct clk		*clock;
 	bool			suspended;
@@ -284,11 +284,11 @@ static irqreturn_t cmdq_irq_handler(int irq, void *dev)
 	unsigned long irq_status, flags = 0L;
 	int bit;
 
-	irq_status = readl(cmdq->base + CMDQ_CURR_IRQ_STATUS) & CMDQ_IRQ_MASK;
-	if (!(irq_status ^ CMDQ_IRQ_MASK))
+	irq_status = readl(cmdq->base + CMDQ_CURR_IRQ_STATUS) & cmdq->irq_mask;
+	if (!(irq_status ^ cmdq->irq_mask))
 		return IRQ_NONE;
 
-	for_each_clear_bit(bit, &irq_status, fls(CMDQ_IRQ_MASK)) {
+	for_each_clear_bit(bit, &irq_status, cmdq->thread_nr) {
 		struct cmdq_thread *thread = &cmdq->thread[bit];
 
 		spin_lock_irqsave(&thread->chan->lock, flags);
@@ -472,6 +472,9 @@ static int cmdq_probe(struct platform_device *pdev)
 		dev_err(dev, "failed to get irq\n");
 		return -EINVAL;
 	}
+
+	cmdq->thread_nr = (u32)(unsigned long)of_device_get_match_data(dev);
+	cmdq->irq_mask = GENMASK(cmdq->thread_nr - 1, 0);
 	err = devm_request_irq(dev, cmdq->irq, cmdq_irq_handler, IRQF_SHARED,
 			       "mtk_cmdq", cmdq);
 	if (err < 0) {
@@ -488,7 +491,6 @@ static int cmdq_probe(struct platform_device *pdev)
 		return PTR_ERR(cmdq->clock);
 	}
 
-	cmdq->thread_nr = (u32)(unsigned long)of_device_get_match_data(dev);
 	cmdq->mbox.dev = dev;
 	cmdq->mbox.chans = devm_kcalloc(dev, cmdq->thread_nr,
 					sizeof(*cmdq->mbox.chans), GFP_KERNEL);
-- 
1.9.1