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From:   Po-Wen Kao <powen.kao@mediatek.com>
To:     <linux-scsi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Avri Altman <avri.altman@wdc.com>,
        Bart Van Assche <bvanassche@acm.org>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>
CC:     <wsd_upstream@mediatek.com>, <peter.wang@mediatek.com>,
        <stanley.chu@mediatek.com>, <powen.kao@mediatek.com>,
        <alice.chao@mediatek.com>, <naomi.chu@mediatek.com>,
        <chun-hung.wu@mediatek.com>, <cc.chou@mediatek.com>,
        <eddie.huang@mediatek.com>
Subject: [PATCH v1 1/4] scsi: ufs: core: Add host quirk UFSHCD_QUIRK_MCQ_BROKEN_INTR
Date:   Mon, 12 Jun 2023 16:58:09 +0800
Message-ID: <20230612085817.12275-2-powen.kao@mediatek.com>
In-Reply-To: <20230612085817.12275-1-powen.kao@mediatek.com>
References: <20230612085817.12275-1-powen.kao@mediatek.com>
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Quirk UFSHCD_QUIRK_MCQ_BROKEN_INTR is introduced for host that
implement different interrupt topology from UFSHCI 4.0 spec.
Some host raise per hw queue interrupt in addition to
CQES (traditional) when ESI is disabled.

Enable this quirk will disable CQES and use only per hw queue
interrupt.

Signed-off-by: Po-Wen Kao <powen.kao@mediatek.com>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/ufs/core/ufshcd.c | 6 +++++-
 include/ufs/ufshcd.h      | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 5da62248ebc4..5e093eba897b 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8608,11 +8608,15 @@ static int ufshcd_alloc_mcq(struct ufs_hba *hba)
 static void ufshcd_config_mcq(struct ufs_hba *hba)
 {
 	int ret;
+	u32 intrs;
 
 	ret = ufshcd_mcq_vops_config_esi(hba);
 	dev_info(hba->dev, "ESI %sconfigured\n", ret ? "is not " : "");
 
-	ufshcd_enable_intr(hba, UFSHCD_ENABLE_MCQ_INTRS);
+	intrs = UFSHCD_ENABLE_MCQ_INTRS;
+	if (hba->quirks & UFSHCD_QUIRK_MCQ_BROKEN_INTR)
+		intrs &= ~MCQ_CQ_EVENT_STATUS;
+	ufshcd_enable_intr(hba, intrs);
 	ufshcd_mcq_make_queues_operational(hba);
 	ufshcd_mcq_config_mac(hba, hba->nutrs);
 
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 9b2d1859f885..ea43ceaf881c 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -611,6 +611,13 @@ enum ufshcd_quirks {
 	 * to reinit the device after switching to maximum gear.
 	 */
 	UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH       = 1 << 19,
+
+	/*
+	 * Some host raises interrupt (per queue) in addition to
+	 * CQES (traditional) when ESI is disabled.
+	 * Enable this quirk will disable CQES and use per queue interrupt.
+	 */
+	UFSHCD_QUIRK_MCQ_BROKEN_INTR			= 1 << 20,
 };
 
 enum ufshcd_caps {
-- 
2.18.0