0001-scsi-ufs-Add-configuration-descriptor-definition.patch

From be1ab818f951653047fb153aa734b69e1cad7bc8 Mon Sep 17 00:00:00 2001
From: Avri Altman <avri.altman@wdc.com>
Date: Mon, 1 Apr 2019 10:37:24 +0300
Subject: [PATCH 01/25] scsi: ufs: Add configuration descriptor definition

The device configuration set by the manufacturer can be modified by
writing the Configuration Descriptor. So while this is practically the
only writable descriptor that uses us for provisioning, somehow its
definition was left behind forsaken.

The configuration descriptor has somehow an obscure structure: a 0x10
bytes of header, followed by 8 configurable unit descriptors, hence its
size: 0x10 + 8 x 0x10 = 0x90.

When sending a provisioning query request upiu, we use the index field
to designate which luns we configure. Using index = 0x0, the
configuration descriptor header is full, and it allows to provision unit
descriptors 0 to 7. Index 1 refers to unit descriptors 8 to 15, and so
on, for all possible 32 luns. for index 1 to 3, we fill only the first 3
bytes of the configuration descriptor header.

This structure and provisioning mechanism is defined by UFS spec V2.1,
as well as earlier versions.

While at it, ad the health descriptor index as well.

Change-Id: Ieea54262b0b0c007e02f444269859470aa2fe0af
Signed-off-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufs.h      | 29 +++++++++++++++++++++++++++++
 include/uapi/scsi/ufs/ufs.h |  3 ++-
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufs.h b/drivers/scsi/ufs/ufs.h
index 00df886..ec1b5a7 100644
--- a/drivers/scsi/ufs/ufs.h
+++ b/drivers/scsi/ufs/ufs.h
@@ -467,6 +467,35 @@ struct ufs_query_res {
 #define UFS_VREG_VCCQ2_MIN_UV	   1650000 /* uV */
 #define UFS_VREG_VCCQ2_MAX_UV	   1950000 /* uV */
 
+/* configuration descriptor header parameters offsets in bytes*/
+enum conf_desc_param {
+	CONF_DESC_PARAM_LEN			= 0x0,
+	CONF_DESC_PARAM_TYPE			= 0x1,
+	CONF_DESC_PARAM_CONTINUE		= 0x2,
+	CONF_DESC_PARAM_BOOT_ENABLE		= 0x3,
+	CONF_DESC_PARAM_ACCESS_ENABLE		= 0x4,
+	CONF_DESC_PARAM_INIT_POWER_MODE		= 0x5,
+	CONF_DESC_PARAM_LU_HIGH_PRIORITY	= 0x6,
+	CONF_DESC_PARAM_SECURE_REMOVAL		= 0x7,
+	CONF_DESC_PARAM_INIT_ACTIVE_ICC		= 0x8,
+	CONF_DESC_PARAM_RTC_PERIOD		= 0x9,
+	CONF_DESC_PARAM_RESERVED		= 0xB,
+};
+
+/* Unit descriptor configurable parameters offsets in bytes*/
+enum unit_conf_desc_param {
+	UNITC_DESC_PARAM_LU_ENABLE		= 0x0,
+	UNITC_DESC_PARAM_BOOT_LUN_ID		= 0x1,
+	UNITC_DESC_PARAM_LU_WR_PROTECT		= 0x2,
+	UNITC_DESC_PARAM_MEM_TYPE		= 0x3,
+	UNITC_DESC_PARAM_NUM_ALLOC_UNITS	= 0x4,
+	UNITC_DESC_PARAM_DATA_RELIABILITY	= 0x8,
+	UNITC_DESC_PARAM_LOGICAL_BLK_SIZE	= 0x9,
+	UNITC_DESC_PARAM_PROVISIONING_TYPE	= 0xA,
+	UNITC_DESC_PARAM_CTX_CAPABILITIES	= 0xB,
+	UNITC_DESC_PARAM_RESERVED		= 0xC,
+};
+
 /*
  * VCCQ & VCCQ2 current requirement when UFS device is in sleep state
  * and link is in Hibern8 state.
diff --git a/include/uapi/scsi/ufs/ufs.h b/include/uapi/scsi/ufs/ufs.h
index 246cd9a..aeace28 100644
--- a/include/uapi/scsi/ufs/ufs.h
+++ b/include/uapi/scsi/ufs/ufs.h
@@ -55,7 +55,8 @@ enum desc_idn {
 	QUERY_DESC_IDN_RFU_1		= 0x6,
 	QUERY_DESC_IDN_GEOMETRY		= 0x7,
 	QUERY_DESC_IDN_POWER		= 0x8,
-	QUERY_DESC_IDN_RFU_2		= 0x9,
+	QUERY_DESC_IDN_HEALTH		= 0x9,
+	QUERY_DESC_IDN_RFU_2		= 0xA,
 	QUERY_DESC_IDN_MAX,
 };
 
-- 
2.7.4