linux-kernel - [PATCH v2 1/3] scsi: ufs: introduce vendor isr

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Date:   Mon, 13 Sep 2021 16:55:53 +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: [PATCH v2 1/3] 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 | 14 +++++++++++++-
 drivers/scsi/ufs/ufshcd.h |  1 +
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3841ab49..604c505 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -218,6 +218,13 @@ static struct ufs_dev_fix ufs_fixups[] = {
 	END_FIX
 };
 
+static inline irqreturn_t
+ufshcd_vendor_isr_def(struct ufs_hba *hba)
+{
+	return IRQ_NONE;
+}
+DEFINE_STATIC_CALL(vendor_isr, ufshcd_vendor_isr_def);
+
 static irqreturn_t ufshcd_tmc_handler(struct ufs_hba *hba);
 static void ufshcd_async_scan(void *data, async_cookie_t cookie);
 static int ufshcd_reset_and_restore(struct ufs_hba *hba);
@@ -6445,7 +6452,9 @@ 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;
+	irqreturn_t retval;
+
+	retval = static_call(vendor_isr)(hba);
 
 	if (intr_status & UFSHCD_UIC_MASK)
 		retval |= ufshcd_uic_cmd_compl(hba, intr_status);
@@ -8533,6 +8542,9 @@ static int ufshcd_variant_hba_init(struct ufs_hba *hba)
 	if (err)
 		dev_err(hba->dev, "%s: variant %s init failed err %d\n",
 			__func__, ufshcd_get_var_name(hba), err);
+
+	if (hba->vops->intr)
+		static_call_update(vendor_isr, *hba->vops->intr);
 out:
 	return err;
 }
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 52ea6f3..7af5d5b 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);
 };
 
 /* clock gating state  */
-- 
2.7.4