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linux/drivers/scsi/ufs/ufshci.h
Adrian Hunter ad44837882 scsi: ufs: Add support for Auto-Hibernate Idle Timer 
UFS host controllers may support an autonomous power management feature
called the Auto-Hibernate Idle Timer. The timer is set to the number of
microseconds of idle time before the UFS host controller will autonomously
put the link into Hibernate state. That will save power at the expense of
increased latency. Any access to the host controller interface registers
will automatically put the link out of Hibernate state. So once configured,
the feature is transparent to the driver.

Expose the Auto-Hibernate Idle Timer value via SysFS to allow users to
choose between power efficiency or lower latency. Set a default value of
150 ms.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-03-21 21:21:25 -04:00

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/*
* Universal Flash Storage Host controller driver
*
* This code is based on drivers/scsi/ufs/ufshci.h
* Copyright (C) 2011-2013 Samsung India Software Operations
*
* Authors:
* Santosh Yaraganavi <santosh.sy@samsung.com>
* Vinayak Holikatti <h.vinayak@samsung.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* See the COPYING file in the top-level directory or visit
* <http://www.gnu.org/licenses/gpl-2.0.html>
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This program is provided "AS IS" and "WITH ALL FAULTS" and
* without warranty of any kind. You are solely responsible for
* determining the appropriateness of using and distributing
* the program and assume all risks associated with your exercise
* of rights with respect to the program, including but not limited
* to infringement of third party rights, the risks and costs of
* program errors, damage to or loss of data, programs or equipment,
* and unavailability or interruption of operations. Under no
* circumstances will the contributor of this Program be liable for
* any damages of any kind arising from your use or distribution of
* this program.
*/
#ifndef _UFSHCI_H
#define _UFSHCI_H
enum {
TASK_REQ_UPIU_SIZE_DWORDS = 8,
TASK_RSP_UPIU_SIZE_DWORDS = 8,
ALIGNED_UPIU_SIZE = 512,
};
/* UFSHCI Registers */
enum {
REG_CONTROLLER_CAPABILITIES = 0x00,
REG_UFS_VERSION = 0x08,
REG_CONTROLLER_DEV_ID = 0x10,
REG_CONTROLLER_PROD_ID = 0x14,
REG_AUTO_HIBERNATE_IDLE_TIMER = 0x18,
REG_INTERRUPT_STATUS = 0x20,
REG_INTERRUPT_ENABLE = 0x24,
REG_CONTROLLER_STATUS = 0x30,
REG_CONTROLLER_ENABLE = 0x34,
REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER = 0x38,
REG_UIC_ERROR_CODE_DATA_LINK_LAYER = 0x3C,
REG_UIC_ERROR_CODE_NETWORK_LAYER = 0x40,
REG_UIC_ERROR_CODE_TRANSPORT_LAYER = 0x44,
REG_UIC_ERROR_CODE_DME = 0x48,
REG_UTP_TRANSFER_REQ_INT_AGG_CONTROL = 0x4C,
REG_UTP_TRANSFER_REQ_LIST_BASE_L = 0x50,
REG_UTP_TRANSFER_REQ_LIST_BASE_H = 0x54,
REG_UTP_TRANSFER_REQ_DOOR_BELL = 0x58,
REG_UTP_TRANSFER_REQ_LIST_CLEAR = 0x5C,
REG_UTP_TRANSFER_REQ_LIST_RUN_STOP = 0x60,
REG_UTP_TASK_REQ_LIST_BASE_L = 0x70,
REG_UTP_TASK_REQ_LIST_BASE_H = 0x74,
REG_UTP_TASK_REQ_DOOR_BELL = 0x78,
REG_UTP_TASK_REQ_LIST_CLEAR = 0x7C,
REG_UTP_TASK_REQ_LIST_RUN_STOP = 0x80,
REG_UIC_COMMAND = 0x90,
REG_UIC_COMMAND_ARG_1 = 0x94,
REG_UIC_COMMAND_ARG_2 = 0x98,
REG_UIC_COMMAND_ARG_3 = 0x9C,
UFSHCI_REG_SPACE_SIZE = 0xA0,
REG_UFS_CCAP = 0x100,
REG_UFS_CRYPTOCAP = 0x104,
UFSHCI_CRYPTO_REG_SPACE_SIZE = 0x400,
};
/* Controller capability masks */
enum {
MASK_TRANSFER_REQUESTS_SLOTS = 0x0000001F,
MASK_TASK_MANAGEMENT_REQUEST_SLOTS = 0x00070000,
MASK_AUTO_HIBERN8_SUPPORT = 0x00800000,
MASK_64_ADDRESSING_SUPPORT = 0x01000000,
MASK_OUT_OF_ORDER_DATA_DELIVERY_SUPPORT = 0x02000000,
MASK_UIC_DME_TEST_MODE_SUPPORT = 0x04000000,
};
#define UFS_MASK(mask, offset) ((mask) << (offset))
/* UFS Version 08h */
#define MINOR_VERSION_NUM_MASK UFS_MASK(0xFFFF, 0)
#define MAJOR_VERSION_NUM_MASK UFS_MASK(0xFFFF, 16)
/* Controller UFSHCI version */
enum {
UFSHCI_VERSION_10 = 0x00010000, /* 1.0 */
UFSHCI_VERSION_11 = 0x00010100, /* 1.1 */
UFSHCI_VERSION_20 = 0x00000200, /* 2.0 */
UFSHCI_VERSION_21 = 0x00000210, /* 2.1 */
};
/*
* HCDDID - Host Controller Identification Descriptor
* - Device ID and Device Class 10h
*/
#define DEVICE_CLASS UFS_MASK(0xFFFF, 0)
#define DEVICE_ID UFS_MASK(0xFF, 24)
/*
* HCPMID - Host Controller Identification Descriptor
* - Product/Manufacturer ID 14h
*/
#define MANUFACTURE_ID_MASK UFS_MASK(0xFFFF, 0)
#define PRODUCT_ID_MASK UFS_MASK(0xFFFF, 16)
/* AHIT - Auto-Hibernate Idle Timer */
#define UFSHCI_AHIBERN8_TIMER_MASK GENMASK(9, 0)
#define UFSHCI_AHIBERN8_SCALE_MASK GENMASK(12, 10)
#define UFSHCI_AHIBERN8_SCALE_FACTOR 10
#define UFSHCI_AHIBERN8_MAX (1023 * 100000)
/*
* IS - Interrupt Status - 20h
*/
#define UTP_TRANSFER_REQ_COMPL 0x1
#define UIC_DME_END_PT_RESET 0x2
#define UIC_ERROR 0x4
#define UIC_TEST_MODE 0x8
#define UIC_POWER_MODE 0x10
#define UIC_HIBERNATE_EXIT 0x20
#define UIC_HIBERNATE_ENTER 0x40
#define UIC_LINK_LOST 0x80
#define UIC_LINK_STARTUP 0x100
#define UTP_TASK_REQ_COMPL 0x200
#define UIC_COMMAND_COMPL 0x400
#define DEVICE_FATAL_ERROR 0x800
#define CONTROLLER_FATAL_ERROR 0x10000
#define SYSTEM_BUS_FATAL_ERROR 0x20000
#define UFSHCD_UIC_PWR_MASK (UIC_HIBERNATE_ENTER |\
UIC_HIBERNATE_EXIT |\
UIC_POWER_MODE)
#define UFSHCD_UIC_MASK (UIC_COMMAND_COMPL | UFSHCD_UIC_PWR_MASK)
#define UFSHCD_ERROR_MASK (UIC_ERROR |\
DEVICE_FATAL_ERROR |\
CONTROLLER_FATAL_ERROR |\
SYSTEM_BUS_FATAL_ERROR)
#define INT_FATAL_ERRORS (DEVICE_FATAL_ERROR |\
CONTROLLER_FATAL_ERROR |\
SYSTEM_BUS_FATAL_ERROR)
/* HCS - Host Controller Status 30h */
#define DEVICE_PRESENT 0x1
#define UTP_TRANSFER_REQ_LIST_READY 0x2
#define UTP_TASK_REQ_LIST_READY 0x4
#define UIC_COMMAND_READY 0x8
#define HOST_ERROR_INDICATOR 0x10
#define DEVICE_ERROR_INDICATOR 0x20
#define UIC_POWER_MODE_CHANGE_REQ_STATUS_MASK UFS_MASK(0x7, 8)
#define UFSHCD_STATUS_READY (UTP_TRANSFER_REQ_LIST_READY |\
UTP_TASK_REQ_LIST_READY |\
UIC_COMMAND_READY)
enum {
PWR_OK = 0x0,
PWR_LOCAL = 0x01,
PWR_REMOTE = 0x02,
PWR_BUSY = 0x03,
PWR_ERROR_CAP = 0x04,
PWR_FATAL_ERROR = 0x05,
};
/* HCE - Host Controller Enable 34h */
#define CONTROLLER_ENABLE 0x1
#define CONTROLLER_DISABLE 0x0
#define CRYPTO_GENERAL_ENABLE 0x2
/* UECPA - Host UIC Error Code PHY Adapter Layer 38h */
#define UIC_PHY_ADAPTER_LAYER_ERROR 0x80000000
#define UIC_PHY_ADAPTER_LAYER_ERROR_CODE_MASK 0x1F
#define UIC_PHY_ADAPTER_LAYER_LANE_ERR_MASK 0xF
/* UECDL - Host UIC Error Code Data Link Layer 3Ch */
#define UIC_DATA_LINK_LAYER_ERROR 0x80000000
#define UIC_DATA_LINK_LAYER_ERROR_CODE_MASK 0x7FFF
#define UIC_DATA_LINK_LAYER_ERROR_TCX_REP_TIMER_EXP 0x2
#define UIC_DATA_LINK_LAYER_ERROR_AFCX_REQ_TIMER_EXP 0x4
#define UIC_DATA_LINK_LAYER_ERROR_FCX_PRO_TIMER_EXP 0x8
#define UIC_DATA_LINK_LAYER_ERROR_RX_BUF_OF 0x20
#define UIC_DATA_LINK_LAYER_ERROR_PA_INIT 0x2000
#define UIC_DATA_LINK_LAYER_ERROR_NAC_RECEIVED 0x0001
#define UIC_DATA_LINK_LAYER_ERROR_TCx_REPLAY_TIMEOUT 0x0002
/* UECN - Host UIC Error Code Network Layer 40h */
#define UIC_NETWORK_LAYER_ERROR 0x80000000
#define UIC_NETWORK_LAYER_ERROR_CODE_MASK 0x7
#define UIC_NETWORK_UNSUPPORTED_HEADER_TYPE 0x1
#define UIC_NETWORK_BAD_DEVICEID_ENC 0x2
#define UIC_NETWORK_LHDR_TRAP_PACKET_DROPPING 0x4
/* UECT - Host UIC Error Code Transport Layer 44h */
#define UIC_TRANSPORT_LAYER_ERROR 0x80000000
#define UIC_TRANSPORT_LAYER_ERROR_CODE_MASK 0x7F
#define UIC_TRANSPORT_UNSUPPORTED_HEADER_TYPE 0x1
#define UIC_TRANSPORT_UNKNOWN_CPORTID 0x2
#define UIC_TRANSPORT_NO_CONNECTION_RX 0x4
#define UIC_TRANSPORT_CONTROLLED_SEGMENT_DROPPING 0x8
#define UIC_TRANSPORT_BAD_TC 0x10
#define UIC_TRANSPORT_E2E_CREDIT_OVERFOW 0x20
#define UIC_TRANSPORT_SAFETY_VALUE_DROPPING 0x40
/* UECDME - Host UIC Error Code DME 48h */
#define UIC_DME_ERROR 0x80000000
#define UIC_DME_ERROR_CODE_MASK 0x1
/* UTRIACR - Interrupt Aggregation control register - 0x4Ch */
#define INT_AGGR_TIMEOUT_VAL_MASK 0xFF
#define INT_AGGR_COUNTER_THRESHOLD_MASK UFS_MASK(0x1F, 8)
#define INT_AGGR_COUNTER_AND_TIMER_RESET 0x10000
#define INT_AGGR_STATUS_BIT 0x100000
#define INT_AGGR_PARAM_WRITE 0x1000000
#define INT_AGGR_ENABLE 0x80000000
/* UTRLRSR - UTP Transfer Request Run-Stop Register 60h */
#define UTP_TRANSFER_REQ_LIST_RUN_STOP_BIT 0x1
/* UTMRLRSR - UTP Task Management Request Run-Stop Register 80h */
#define UTP_TASK_REQ_LIST_RUN_STOP_BIT 0x1
/* UICCMD - UIC Command */
#define COMMAND_OPCODE_MASK 0xFF
#define GEN_SELECTOR_INDEX_MASK 0xFFFF
#define MIB_ATTRIBUTE_MASK UFS_MASK(0xFFFF, 16)
#define RESET_LEVEL 0xFF
#define ATTR_SET_TYPE_MASK UFS_MASK(0xFF, 16)
#define CONFIG_RESULT_CODE_MASK 0xFF
#define GENERIC_ERROR_CODE_MASK 0xFF
/* GenSelectorIndex calculation macros for M-PHY attributes */
#define UIC_ARG_MPHY_TX_GEN_SEL_INDEX(lane) (lane)
#define UIC_ARG_MPHY_RX_GEN_SEL_INDEX(lane) (PA_MAXDATALANES + (lane))
#define UIC_ARG_MIB_SEL(attr, sel) ((((attr) & 0xFFFF) << 16) |\
((sel) & 0xFFFF))
#define UIC_ARG_MIB(attr) UIC_ARG_MIB_SEL(attr, 0)
#define UIC_ARG_ATTR_TYPE(t) (((t) & 0xFF) << 16)
#define UIC_GET_ATTR_ID(v) (((v) >> 16) & 0xFFFF)
/* Link Status*/
enum link_status {
UFSHCD_LINK_IS_DOWN = 1,
UFSHCD_LINK_IS_UP = 2,
};
/* UIC Commands */
enum uic_cmd_dme {
UIC_CMD_DME_GET = 0x01,
UIC_CMD_DME_SET = 0x02,
UIC_CMD_DME_PEER_GET = 0x03,
UIC_CMD_DME_PEER_SET = 0x04,
UIC_CMD_DME_POWERON = 0x10,
UIC_CMD_DME_POWEROFF = 0x11,
UIC_CMD_DME_ENABLE = 0x12,
UIC_CMD_DME_RESET = 0x14,
UIC_CMD_DME_END_PT_RST = 0x15,
UIC_CMD_DME_LINK_STARTUP = 0x16,
UIC_CMD_DME_HIBER_ENTER = 0x17,
UIC_CMD_DME_HIBER_EXIT = 0x18,
UIC_CMD_DME_TEST_MODE = 0x1A,
};
/* UIC Config result code / Generic error code */
enum {
UIC_CMD_RESULT_SUCCESS = 0x00,
UIC_CMD_RESULT_INVALID_ATTR = 0x01,
UIC_CMD_RESULT_FAILURE = 0x01,
UIC_CMD_RESULT_INVALID_ATTR_VALUE = 0x02,
UIC_CMD_RESULT_READ_ONLY_ATTR = 0x03,
UIC_CMD_RESULT_WRITE_ONLY_ATTR = 0x04,
UIC_CMD_RESULT_BAD_INDEX = 0x05,
UIC_CMD_RESULT_LOCKED_ATTR = 0x06,
UIC_CMD_RESULT_BAD_TEST_FEATURE_INDEX = 0x07,
UIC_CMD_RESULT_PEER_COMM_FAILURE = 0x08,
UIC_CMD_RESULT_BUSY = 0x09,
UIC_CMD_RESULT_DME_FAILURE = 0x0A,
};
#define MASK_UIC_COMMAND_RESULT 0xFF
#define INT_AGGR_COUNTER_THLD_VAL(c) (((c) & 0x1F) << 8)
#define INT_AGGR_TIMEOUT_VAL(t) (((t) & 0xFF) << 0)
/* Interrupt disable masks */
enum {
/* Interrupt disable mask for UFSHCI v1.0 */
INTERRUPT_MASK_ALL_VER_10 = 0x30FFF,
INTERRUPT_MASK_RW_VER_10 = 0x30000,
/* Interrupt disable mask for UFSHCI v1.1 */
INTERRUPT_MASK_ALL_VER_11 = 0x31FFF,
/* Interrupt disable mask for UFSHCI v2.1 */
INTERRUPT_MASK_ALL_VER_21 = 0x71FFF,
};
/*
* Request Descriptor Definitions
*/
/* Transfer request command type */
enum {
UTP_CMD_TYPE_SCSI = 0x0,
UTP_CMD_TYPE_UFS = 0x1,
UTP_CMD_TYPE_DEV_MANAGE = 0x2,
};
/* To accommodate UFS2.0 required Command type */
enum {
UTP_CMD_TYPE_UFS_STORAGE = 0x1,
};
enum {
UTP_SCSI_COMMAND = 0x00000000,
UTP_NATIVE_UFS_COMMAND = 0x10000000,
UTP_DEVICE_MANAGEMENT_FUNCTION = 0x20000000,
UTP_REQ_DESC_INT_CMD = 0x01000000,
};
/* UTP Transfer Request Data Direction (DD) */
enum {
UTP_NO_DATA_TRANSFER = 0x00000000,
UTP_HOST_TO_DEVICE = 0x02000000,
UTP_DEVICE_TO_HOST = 0x04000000,
};
/* Overall command status values */
enum {
OCS_SUCCESS = 0x0,
OCS_INVALID_CMD_TABLE_ATTR = 0x1,
OCS_INVALID_PRDT_ATTR = 0x2,
OCS_MISMATCH_DATA_BUF_SIZE = 0x3,
OCS_MISMATCH_RESP_UPIU_SIZE = 0x4,
OCS_PEER_COMM_FAILURE = 0x5,
OCS_ABORTED = 0x6,
OCS_FATAL_ERROR = 0x7,
OCS_INVALID_COMMAND_STATUS = 0x0F,
MASK_OCS = 0x0F,
};
/* The maximum length of the data byte count field in the PRDT is 256KB */
#define PRDT_DATA_BYTE_COUNT_MAX (256 * 1024)
/* The granularity of the data byte count field in the PRDT is 32-bit */
#define PRDT_DATA_BYTE_COUNT_PAD 4
/**
* struct ufshcd_sg_entry - UFSHCI PRD Entry
* @base_addr: Lower 32bit physical address DW-0
* @upper_addr: Upper 32bit physical address DW-1
* @reserved: Reserved for future use DW-2
* @size: size of physical segment DW-3
*/
struct ufshcd_sg_entry {
__le32 base_addr;
__le32 upper_addr;
__le32 reserved;
__le32 size;
};
/**
* struct utp_transfer_cmd_desc - UFS Command Descriptor structure
* @command_upiu: Command UPIU Frame address
* @response_upiu: Response UPIU Frame address
* @prd_table: Physical Region Descriptor
*/
struct utp_transfer_cmd_desc {
u8 command_upiu[ALIGNED_UPIU_SIZE];
u8 response_upiu[ALIGNED_UPIU_SIZE];
struct ufshcd_sg_entry prd_table[SG_ALL];
};
/**
* struct request_desc_header - Descriptor Header common to both UTRD and UTMRD
* @dword0: Descriptor Header DW0
* @dword1: Descriptor Header DW1
* @dword2: Descriptor Header DW2
* @dword3: Descriptor Header DW3
*/
struct request_desc_header {
__le32 dword_0;
__le32 dword_1;
__le32 dword_2;
__le32 dword_3;
};
/**
* struct utp_transfer_req_desc - UTRD structure
* @header: UTRD header DW-0 to DW-3
* @command_desc_base_addr_lo: UCD base address low DW-4
* @command_desc_base_addr_hi: UCD base address high DW-5
* @response_upiu_length: response UPIU length DW-6
* @response_upiu_offset: response UPIU offset DW-6
* @prd_table_length: Physical region descriptor length DW-7
* @prd_table_offset: Physical region descriptor offset DW-7
*/
struct utp_transfer_req_desc {
/* DW 0-3 */
struct request_desc_header header;
/* DW 4-5*/
__le32 command_desc_base_addr_lo;
__le32 command_desc_base_addr_hi;
/* DW 6 */
__le16 response_upiu_length;
__le16 response_upiu_offset;
/* DW 7 */
__le16 prd_table_length;
__le16 prd_table_offset;
};
/**
* struct utp_task_req_desc - UTMRD structure
* @header: UTMRD header DW-0 to DW-3
* @task_req_upiu: Pointer to task request UPIU DW-4 to DW-11
* @task_rsp_upiu: Pointer to task response UPIU DW12 to DW-19
*/
struct utp_task_req_desc {
/* DW 0-3 */
struct request_desc_header header;
/* DW 4-11 */
__le32 task_req_upiu[TASK_REQ_UPIU_SIZE_DWORDS];
/* DW 12-19 */
__le32 task_rsp_upiu[TASK_RSP_UPIU_SIZE_DWORDS];
};
#endif /* End of Header */
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