linux-kernel - RE: [PATCH v1] scsi: ufs: add a variant operation in struct ufs_hba_variant

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Message-ID: <000001d8c728$030bbdb0$09233910$@samsung.com>
Date:   Tue, 13 Sep 2022 09:49:24 +0530
From:   "Alim Akhtar" <alim.akhtar@...sung.com>
To:     "'SEO HOYOUNG'" <hy50.seo@...sung.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <avri.altman@....com>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>, <beanhuo@...ron.com>,
        <asutoshd@...eaurora.org>, <cang@...eaurora.org>,
        <bvanassche@....org>, <bhoon95.kim@...sung.com>,
        <kwmad.kim@...sung.com>
Subject: RE: [PATCH v1] scsi: ufs: add a variant operation in struct
 ufs_hba_variant_ops



>-----Original Message-----
>From: SEO HOYOUNG [mailto:hy50.seo@...sung.com]
>Sent: Monday, September 12, 2022 7:30 PM
>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;
>asutoshd@...eaurora.org; cang@...eaurora.org; bvanassche@....org;
>bhoon95.kim@...sung.com; kwmad.kim@...sung.com
>Cc: SEO HOYOUNG <hy50.seo@...sung.com>
>Subject: [PATCH v1] scsi: ufs: add a variant operation in struct
>ufs_hba_variant_ops
>
>Add ufs_hba_variant_ops about vendor error in check_error.
>It need to reset when occurred ah8 related error.
>At that time could not recovery with pwr cmd.
>So add vendor error check function at ufs_hba_variant_ops.
>
I didn't understand why you need this, looks like you are using AH8.
So IS (interrupt status) bit[5], bit[6] , HIBERNATE_EXIT and HIBERNATE_ENTRY should still give you the error status?


>Change-Id: I24c76a372931e702b357c86a5dc36e93ce4b5fda
This is something unwanted

>Signed-off-by: SEO HOYOUNG <hy50.seo@...sung.com>
>---
> drivers/ufs/core/ufshcd-priv.h |  7 +++++++
> drivers/ufs/core/ufshcd.c      |  2 ++
> drivers/ufs/host/ufs-exynos.c  | 19 +++++++++++++++++++
> include/ufs/ufshcd.h           |  1 +
> 4 files changed, 29 insertions(+)
>
>diff --git a/drivers/ufs/core/ufshcd-priv.h b/drivers/ufs/core/ufshcd-priv.h
>index d00dba17297d..6172da4d3484 100644
>--- a/drivers/ufs/core/ufshcd-priv.h
>+++ b/drivers/ufs/core/ufshcd-priv.h
>@@ -221,6 +221,13 @@ static inline void
>ufshcd_vops_config_scaling_param(struct ufs_hba *hba,
> 		hba->vops->config_scaling_param(hba, p, data);  }
>
>+static inline void ufshcd_vops_check_int_error(struct ufs_hba *hba,
>+					       bool *queue_eh_work)
>+{
>+	if (hba->vops & hba->vops->check_int_error)
>+		hba->vops->check_int_error(hba, queue_eh_work); }
>+
> extern const struct ufs_pm_lvl_states ufs_pm_lvl_states[];
>
> /**
>diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index
>7c15cbc737b4..39ee5192f26a 100644
>--- a/drivers/ufs/core/ufshcd.c
>+++ b/drivers/ufs/core/ufshcd.c
>@@ -6542,6 +6542,8 @@ static irqreturn_t ufshcd_check_errors(struct
>ufs_hba *hba, u32 intr_status)
> 		queue_eh_work = true;
> 	}
>
>+	ufshcd_vops_check_int_error(hba, &queue_eh_work);
>+
> 	if (queue_eh_work) {
> 		/*
> 		 * update the transfer error masks to sticky bits, let's do this
>diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c
>index eced97538082..b351b8e48b08 100644
>--- a/drivers/ufs/host/ufs-exynos.c
>+++ b/drivers/ufs/host/ufs-exynos.c
>@@ -67,6 +67,10 @@
> #define CLK_CTRL_EN_MASK	(REFCLK_CTRL_EN |\
> 				 UNIPRO_PCLK_CTRL_EN |\
> 				 UNIPRO_MCLK_CTRL_EN)
>+
>+#define HCI_AH8_STATE		0x50C
>+#define HCI_AH8_STATE_ERROR	BIT(16)
>+
> /* Device fatal error */
> #define DFES_ERR_EN		BIT(31)
> #define DFES_DEF_L2_ERRS	(UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF
>|\
>@@ -1376,6 +1380,20 @@ static void exynos_ufs_hibern8_notify(struct
>ufs_hba *hba,
> 	}
> }
>
>+static void exynos_ufs_check_int_error(struct ufs_hba *hba, bool
>+*queue_eh_work) {
>+	struct exynos_ufs *ufs = ufshcd_get_variant(hba);
>+
>+	if (ufshcd_is_auto_hibern8_supported(hba)) {
>+		val = hci_readl(ufs, HCI_AH8_STATE);
>+
>+		if (val & HCI_AH8_STATE_ERROR) {
>+			 ufshcd_set_link_broken(hba);
>+			 queue_eh_work = true;
>+		}
>+	}
>+}
>+
> static int exynos_ufs_suspend(struct ufs_hba *hba, enum ufs_pm_op
>pm_op,
> 	enum ufs_notify_change_status status)
> {
>@@ -1569,6 +1587,7 @@ static const struct ufs_hba_variant_ops
>ufs_hba_exynos_ops = {
> 	.setup_xfer_req			=
>exynos_ufs_specify_nexus_t_xfer_req,
> 	.setup_task_mgmt		=
>exynos_ufs_specify_nexus_t_tm_req,
> 	.hibern8_notify			= exynos_ufs_hibern8_notify,
>+	.check_int_error		= exynos_ufs_check_int_error,
> 	.suspend			= exynos_ufs_suspend,
> 	.resume				= exynos_ufs_resume,
> };
>diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index
>24c97e0772bb..40078c4b9f55 100644
>--- a/include/ufs/ufshcd.h
>+++ b/include/ufs/ufshcd.h
>@@ -335,6 +335,7 @@ 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);
>+	void	(*check_int_error)(struct ufs_hba *hba, bool
>*queue_eh_work);
> };
>
> /* clock gating state  */
>--
>2.26.0