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From: Jaegeuk Kim <jaegeuk@kernel.org>
To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
	kernel-team@android.com
Cc: cang@codeaurora.org, alim.akhtar@samsung.com,
	avri.altman@wdc.com, bvanassche@acm.org,
	martin.petersen@oracle.com, stanley.chu@mediatek.com,
	Jaegeuk Kim <jaegeuk@google.com>
Subject: [PATCH v5 3/7] scsi: ufs: clear UAC for FFU and RPMB LUNs
Date: Tue, 17 Nov 2020 08:58:35 -0800
Message-ID: <20201117165839.1643377-4-jaegeuk@kernel.org> (raw)
In-Reply-To: <20201117165839.1643377-1-jaegeuk@kernel.org>

From: Jaegeuk Kim <jaegeuk@google.com>

In order to conduct FFU or RPMB operations, UFS needs to clear UAC. This patch
clears it explicitly, so that we could get no failure given early execution.

Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
---
 drivers/scsi/ufs/ufshcd.c | 70 +++++++++++++++++++++++++++++++++++----
 drivers/scsi/ufs/ufshcd.h |  1 +
 2 files changed, 65 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 6c9269bffcbd..8e696ca79b40 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7058,7 +7058,6 @@ static inline void ufshcd_blk_pm_runtime_init(struct scsi_device *sdev)
 static int ufshcd_scsi_add_wlus(struct ufs_hba *hba)
 {
 	int ret = 0;
-	struct scsi_device *sdev_rpmb;
 	struct scsi_device *sdev_boot;
 
 	hba->sdev_ufs_device = __scsi_add_device(hba->host, 0, 0,
@@ -7071,14 +7070,14 @@ static int ufshcd_scsi_add_wlus(struct ufs_hba *hba)
 	ufshcd_blk_pm_runtime_init(hba->sdev_ufs_device);
 	scsi_device_put(hba->sdev_ufs_device);
 
-	sdev_rpmb = __scsi_add_device(hba->host, 0, 0,
+	hba->sdev_rpmb = __scsi_add_device(hba->host, 0, 0,
 		ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_RPMB_WLUN), NULL);
-	if (IS_ERR(sdev_rpmb)) {
-		ret = PTR_ERR(sdev_rpmb);
+	if (IS_ERR(hba->sdev_rpmb)) {
+		ret = PTR_ERR(hba->sdev_rpmb);
 		goto remove_sdev_ufs_device;
 	}
-	ufshcd_blk_pm_runtime_init(sdev_rpmb);
-	scsi_device_put(sdev_rpmb);
+	ufshcd_blk_pm_runtime_init(hba->sdev_rpmb);
+	scsi_device_put(hba->sdev_rpmb);
 
 	sdev_boot = __scsi_add_device(hba->host, 0, 0,
 		ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_BOOT_WLUN), NULL);
@@ -7602,6 +7601,63 @@ static int ufshcd_add_lus(struct ufs_hba *hba)
 	return ret;
 }
 
+static int
+ufshcd_send_request_sense(struct ufs_hba *hba, struct scsi_device *sdp);
+
+static int ufshcd_clear_ua_wlun(struct ufs_hba *hba, u8 wlun)
+{
+	struct scsi_device *sdp;
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(hba->host->host_lock, flags);
+	if (wlun  == UFS_UPIU_UFS_DEVICE_WLUN)
+		sdp = hba->sdev_ufs_device;
+	else if (wlun  == UFS_UPIU_RPMB_WLUN)
+		sdp = hba->sdev_rpmb;
+	else
+		BUG_ON(1);
+	if (sdp) {
+		ret = scsi_device_get(sdp);
+		if (!ret && !scsi_device_online(sdp)) {
+			ret = -ENODEV;
+			scsi_device_put(sdp);
+		}
+	} else {
+		ret = -ENODEV;
+	}
+	spin_unlock_irqrestore(hba->host->host_lock, flags);
+	if (ret)
+		goto out_err;
+
+	ret = ufshcd_send_request_sense(hba, sdp);
+	scsi_device_put(sdp);
+out_err:
+	if (ret)
+		dev_err(hba->dev, "%s: UAC clear LU=%x ret = %d\n",
+				__func__, wlun, ret);
+	return ret;
+}
+
+static int ufshcd_clear_ua_wluns(struct ufs_hba *hba)
+{
+	int ret = 0;
+
+	if (!hba->wlun_dev_clr_ua)
+		goto out;
+
+	ret = ufshcd_clear_ua_wlun(hba, UFS_UPIU_UFS_DEVICE_WLUN);
+	if (!ret)
+		ret = ufshcd_clear_ua_wlun(hba, UFS_UPIU_RPMB_WLUN);
+	if (!ret)
+		hba->wlun_dev_clr_ua = false;
+out:
+	if (ret)
+		dev_err(hba->dev, "%s: Failed to clear UAC WLUNS ret = %d\n",
+				__func__, ret);
+	return ret;
+}
+
 /**
  * ufshcd_probe_hba - probe hba to detect device and initialize
  * @hba: per-adapter instance
@@ -7721,6 +7777,8 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie)
 		pm_runtime_put_sync(hba->dev);
 		ufshcd_exit_clk_scaling(hba);
 		ufshcd_hba_exit(hba);
+	} else {
+		ufshcd_clear_ua_wluns(hba);
 	}
 }
 
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 47eb1430274c..718881d038f5 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -681,6 +681,7 @@ struct ufs_hba {
 	 * "UFS device" W-LU.
 	 */
 	struct scsi_device *sdev_ufs_device;
+	struct scsi_device *sdev_rpmb;
 
 	enum ufs_dev_pwr_mode curr_dev_pwr_mode;
 	enum uic_link_state uic_link_state;
-- 
2.29.2.299.gdc1121823c-goog


  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-17 16:58 [PATCH v5 0/5] scsi: ufs: add some fixes Jaegeuk Kim
2020-11-17 16:58 ` [PATCH v5 1/7] scsi: ufs: avoid to call REQ_CLKS_OFF to CLKS_OFF Jaegeuk Kim
2020-11-18  3:54   ` Can Guo
2020-11-17 16:58 ` [PATCH v5 2/7] scsi: ufs: atomic update for clkgating_enable Jaegeuk Kim
2020-11-18  3:54   ` Can Guo
2020-11-17 16:58 ` Jaegeuk Kim [this message]
2020-11-17 16:58 ` [PATCH v5 4/7] scsi: ufs: use WQ_HIGHPRI for gating work Jaegeuk Kim
2020-11-17 16:58 ` [PATCH v5 5/7] scsi: add more contexts in the ufs tracepoints Jaegeuk Kim
2020-11-17 16:58 ` [PATCH v5 6/7] scsi: ufs: fix clkgating on/off correctly Jaegeuk Kim
2020-11-17 16:58 ` [PATCH v5 7/7] scsi: ufs: show lba and length for unmap commands Jaegeuk Kim
2020-11-18  1:11   ` Can Guo
2020-11-20  3:01 ` [PATCH v5 0/5] scsi: ufs: add some fixes Martin K. Petersen
2020-11-24  3:58 ` Martin K. Petersen

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