linux-kernel - [RFC PATCH v1 1/2] scsi: ufs: introduce vendor isr

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Message-Id: <0f6f2337e98f8a8a7dfae816bc001af28fa3a7be.1628231581.git.kwmad.kim@samsung.com>
Date:   Fri,  6 Aug 2021 15:34:11 +0900
From:   Kiwoong Kim <kwmad.kim@...sung.com>
To:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, beanhuo@...ron.com,
        cang@...eaurora.org, adrian.hunter@...el.com, sc.suh@...sung.com,
        hy50.seo@...sung.com, sh425.lee@...sung.com,
        bhoon95.kim@...sung.com
Cc:     Kiwoong Kim <kwmad.kim@...sung.com>
Subject: [RFC PATCH v1 1/2] scsi: ufs: introduce vendor isr

This patch is to activate some interrupt sources
that aren't defined in UFSHCI specifications. Those
purpose could be error handling, workaround or whatever.

Signed-off-by: Kiwoong Kim <kwmad.kim@...sung.com>
---
 drivers/scsi/ufs/ufshcd.c | 10 ++++++++++
 drivers/scsi/ufs/ufshcd.h |  8 ++++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 05495c34a2b7..f85a9b335e0b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6428,6 +6428,16 @@ static irqreturn_t ufshcd_tmc_handler(struct ufs_hba *hba)
 static irqreturn_t ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
 {
 	irqreturn_t retval = IRQ_NONE;
+	int res = 0;
+	unsigned long flags;
+
+	retval = ufshcd_vops_intr(hba, &res);
+	if (res) {
+		spin_lock_irqsave(hba->host->host_lock, flags);
+		hba->force_reset = true;
+		ufshcd_schedule_eh_work(hba);
+		spin_unlock_irqrestore(hba->host->host_lock, flags);
+	}
 
 	if (intr_status & UFSHCD_UIC_MASK)
 		retval |= ufshcd_uic_cmd_compl(hba, intr_status);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 971cfabc4a1e..1ed0a911f864 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -356,6 +356,7 @@ struct ufs_hba_variant_ops {
 			       const union ufs_crypto_cfg_entry *cfg, int slot);
 	void	(*event_notify)(struct ufs_hba *hba,
 				enum ufs_event_type evt, void *data);
+	irqreturn_t	(*intr)(struct ufs_hba *hba, int *res);
 };
 
 /* clock gating state  */
@@ -1296,6 +1297,13 @@ static inline void ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
 		hba->vops->config_scaling_param(hba, profile, data);
 }
 
+static inline irqreturn_t ufshcd_vops_intr(struct ufs_hba *hba, int *res)
+{
+	if (hba->vops && hba->vops->intr)
+		return hba->vops->intr(hba, res);
+	return IRQ_NONE;
+}
+
 extern struct ufs_pm_lvl_states ufs_pm_lvl_states[];
 
 /*
-- 
2.31.1