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Date: Tue, 19 Nov 2019 08:04:42 +0100
From: sheebab <sheebab@...ence.com>
To: <alim.akhtar@...sung.com>, <avri.altman@....com>,
<pedrom.sousa@...opsys.com>, <jejb@...ux.ibm.com>,
<martin.petersen@...cle.com>, <stanley.chu@...iatek.com>,
<beanhuo@...ron.com>, <yuehaibing@...wei.com>,
<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<vigneshr@...com>, <linux-block@...r.kernel.org>
CC: <rafalc@...ence.com>, <mparab@...ence.com>,
sheebab <sheebab@...ence.com>
Subject: [PATCH RESEND 2/2] scsi: ufs: Update L4 attributes on manual hibern8 exit in Cadence UFS.
Backup L4 attributes duirng manual hibern8 entry
and restore the L4 attributes on manual hibern8 exit as per JESD220C.
Signed-off-by: sheebab <sheebab@...ence.com>
---
drivers/scsi/ufs/cdns-pltfrm.c | 97 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 95 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c
index adbbd60..5510567 100644
--- a/drivers/scsi/ufs/cdns-pltfrm.c
+++ b/drivers/scsi/ufs/cdns-pltfrm.c
@@ -19,6 +19,14 @@
#define CDNS_UFS_REG_HCLKDIV 0xFC
#define CDNS_UFS_REG_PHY_XCFGD1 0x113C
+#define CDNS_UFS_MAX 12
+
+struct cdns_ufs_host {
+ /**
+ * cdns_ufs_dme_attr_val - for storing L4 attributes
+ */
+ u32 cdns_ufs_dme_attr_val[CDNS_UFS_MAX];
+};
/**
* cdns_ufs_enable_intr - enable interrupts
@@ -47,6 +55,77 @@ static void cdns_ufs_disable_intr(struct ufs_hba *hba, u32 intrs)
}
/**
+ * cdns_ufs_get_l4_attr - get L4 attributes on local side
+ * @hba: per adapter instance
+ *
+ */
+static void cdns_ufs_get_l4_attr(struct ufs_hba *hba)
+{
+ struct cdns_ufs_host *host = ufshcd_get_variant(hba);
+
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_PEERDEVICEID),
+ &host->cdns_ufs_dme_attr_val[0]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_PEERCPORTID),
+ &host->cdns_ufs_dme_attr_val[1]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_TRAFFICCLASS),
+ &host->cdns_ufs_dme_attr_val[2]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_PROTOCOLID),
+ &host->cdns_ufs_dme_attr_val[3]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_CPORTFLAGS),
+ &host->cdns_ufs_dme_attr_val[4]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_TXTOKENVALUE),
+ &host->cdns_ufs_dme_attr_val[5]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_RXTOKENVALUE),
+ &host->cdns_ufs_dme_attr_val[6]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_LOCALBUFFERSPACE),
+ &host->cdns_ufs_dme_attr_val[7]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_PEERBUFFERSPACE),
+ &host->cdns_ufs_dme_attr_val[8]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_CREDITSTOSEND),
+ &host->cdns_ufs_dme_attr_val[9]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_CPORTMODE),
+ &host->cdns_ufs_dme_attr_val[10]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(T_CONNECTIONSTATE),
+ &host->cdns_ufs_dme_attr_val[11]);
+}
+
+/**
+ * cdns_ufs_set_l4_attr - set L4 attributes on local side
+ * @hba: per adapter instance
+ *
+ */
+static void cdns_ufs_set_l4_attr(struct ufs_hba *hba)
+{
+ struct cdns_ufs_host *host = ufshcd_get_variant(hba);
+
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_CONNECTIONSTATE), 0);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_PEERDEVICEID),
+ host->cdns_ufs_dme_attr_val[0]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_PEERCPORTID),
+ host->cdns_ufs_dme_attr_val[1]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_TRAFFICCLASS),
+ host->cdns_ufs_dme_attr_val[2]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_PROTOCOLID),
+ host->cdns_ufs_dme_attr_val[3]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_CPORTFLAGS),
+ host->cdns_ufs_dme_attr_val[4]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_TXTOKENVALUE),
+ host->cdns_ufs_dme_attr_val[5]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_RXTOKENVALUE),
+ host->cdns_ufs_dme_attr_val[6]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_LOCALBUFFERSPACE),
+ host->cdns_ufs_dme_attr_val[7]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_PEERBUFFERSPACE),
+ host->cdns_ufs_dme_attr_val[8]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_CREDITSTOSEND),
+ host->cdns_ufs_dme_attr_val[9]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_CPORTMODE),
+ host->cdns_ufs_dme_attr_val[10]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(T_CONNECTIONSTATE),
+ host->cdns_ufs_dme_attr_val[11]);
+}
+
+/**
* Sets HCLKDIV register value based on the core_clk
* @hba: host controller instance
*
@@ -134,6 +213,7 @@ static void cdns_ufs_hibern8_notify(struct ufs_hba *hba, enum uic_cmd_dme cmd,
* before manual hibernate entry.
*/
cdns_ufs_enable_intr(hba, UFSHCD_UIC_HIBERN8_MASK);
+ cdns_ufs_get_l4_attr(hba);
}
if (status == POST_CHANGE && cmd == UIC_CMD_DME_HIBER_EXIT) {
/**
@@ -141,6 +221,7 @@ static void cdns_ufs_hibern8_notify(struct ufs_hba *hba, enum uic_cmd_dme cmd,
* after manual hibern8 exit.
*/
cdns_ufs_disable_intr(hba, UFSHCD_UIC_HIBERN8_MASK);
+ cdns_ufs_set_l4_attr(hba);
}
}
@@ -245,15 +326,27 @@ static int cdns_ufs_pltfrm_probe(struct platform_device *pdev)
const struct of_device_id *of_id;
struct ufs_hba_variant_ops *vops;
struct device *dev = &pdev->dev;
+ struct cdns_ufs_host *host;
+ struct ufs_hba *hba;
of_id = of_match_node(cdns_ufs_of_match, dev->of_node);
vops = (struct ufs_hba_variant_ops *)of_id->data;
/* Perform generic probe */
err = ufshcd_pltfrm_init(pdev, vops);
- if (err)
+ if (err) {
dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
-
+ goto out;
+ }
+ host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
+ if (!host) {
+ err = -ENOMEM;
+ dev_err(dev, "%s: no memory for cdns host\n", __func__);
+ goto out;
+ }
+ hba = platform_get_drvdata(pdev);
+ ufshcd_set_variant(hba, host);
+out:
return err;
}
--
2.7.4
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