blob: acf318e338eda297d922d644389e2389f941699d [file] [log] [blame]
* Universal Flash Storage Host controller driver
* This code is based on drivers/scsi/ufs/ufshcd.h
* Copyright (C) 2011-2013 Samsung India Software Operations
* Authors:
* Santosh Yaraganavi <>
* Vinayak Holikatti <>
* 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
* <>
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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 _UFSHCD_H
#define _UFSHCD_H
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <linux/bitops.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>
#include "ufs.h"
#include "ufshci.h"
#define UFSHCD "ufshcd"
enum dev_cmd_type {
* struct uic_command - UIC command structure
* @command: UIC command
* @argument1: UIC command argument 1
* @argument2: UIC command argument 2
* @argument3: UIC command argument 3
* @cmd_active: Indicate if UIC command is outstanding
* @result: UIC command result
* @done: UIC command completion
struct uic_command {
u32 command;
u32 argument1;
u32 argument2;
u32 argument3;
int cmd_active;
int result;
struct completion done;
* struct ufshcd_lrb - local reference block
* @utr_descriptor_ptr: UTRD address of the command
* @ucd_req_ptr: UCD address of the command
* @ucd_rsp_ptr: Response UPIU address for this command
* @ucd_prdt_ptr: PRDT address of the command
* @cmd: pointer to SCSI command
* @sense_buffer: pointer to sense buffer address of the SCSI command
* @sense_bufflen: Length of the sense buffer
* @scsi_status: SCSI status of the command
* @command_type: SCSI, UFS, Query.
* @task_tag: Task tag of the command
* @lun: LUN of the command
* @intr_cmd: Interrupt command (doesn't participate in interrupt aggregation)
struct ufshcd_lrb {
struct utp_transfer_req_desc *utr_descriptor_ptr;
struct utp_upiu_req *ucd_req_ptr;
struct utp_upiu_rsp *ucd_rsp_ptr;
struct ufshcd_sg_entry *ucd_prdt_ptr;
struct scsi_cmnd *cmd;
u8 *sense_buffer;
unsigned int sense_bufflen;
int scsi_status;
int command_type;
int task_tag;
unsigned int lun;
bool intr_cmd;
* struct ufs_query - holds relevent data structures for query request
* @request: request upiu and function
* @descriptor: buffer for sending/receiving descriptor
* @response: response upiu and response
struct ufs_query {
struct ufs_query_req request;
u8 *descriptor;
struct ufs_query_res response;
* struct ufs_dev_cmd - all assosiated fields with device management commands
* @type: device management command type - Query, NOP OUT
* @lock: lock to allow one command at a time
* @complete: internal commands completion
* @tag_wq: wait queue until free command slot is available
struct ufs_dev_cmd {
enum dev_cmd_type type;
struct mutex lock;
struct completion *complete;
wait_queue_head_t tag_wq;
struct ufs_query query;
* struct ufs_hba - per adapter private structure
* @mmio_base: UFSHCI base register address
* @ucdl_base_addr: UFS Command Descriptor base address
* @utrdl_base_addr: UTP Transfer Request Descriptor base address
* @utmrdl_base_addr: UTP Task Management Descriptor base address
* @ucdl_dma_addr: UFS Command Descriptor DMA address
* @utrdl_dma_addr: UTRDL DMA address
* @utmrdl_dma_addr: UTMRDL DMA address
* @host: Scsi_Host instance of the driver
* @dev: device handle
* @lrb: local reference block
* @lrb_in_use: lrb in use
* @outstanding_tasks: Bits representing outstanding task requests
* @outstanding_reqs: Bits representing outstanding transfer requests
* @capabilities: UFS Controller Capabilities
* @nutrs: Transfer Request Queue depth supported by controller
* @nutmrs: Task Management Queue depth supported by controller
* @ufs_version: UFS Version to which controller complies
* @irq: Irq number of the controller
* @active_uic_cmd: handle of active UIC command
* @uic_cmd_mutex: mutex for uic command
* @tm_wq: wait queue for task management
* @tm_tag_wq: wait queue for free task management slots
* @tm_slots_in_use: bit map of task management request slots in use
* @pwr_done: completion for power mode change
* @tm_condition: condition variable for task management
* @ufshcd_state: UFSHCD states
* @eh_flags: Error handling flags
* @intr_mask: Interrupt Mask Bits
* @ee_ctrl_mask: Exception event control mask
* @eh_work: Worker to handle UFS errors that require s/w attention
* @eeh_work: Worker to handle exception events
* @errors: HBA errors
* @uic_error: UFS interconnect layer error status
* @saved_err: sticky error mask
* @saved_uic_err: sticky UIC error mask
* @dev_cmd: ufs device management command information
* @auto_bkops_enabled: to track whether bkops is enabled in device
struct ufs_hba {
void __iomem *mmio_base;
/* Virtual memory reference */
struct utp_transfer_cmd_desc *ucdl_base_addr;
struct utp_transfer_req_desc *utrdl_base_addr;
struct utp_task_req_desc *utmrdl_base_addr;
/* DMA memory reference */
dma_addr_t ucdl_dma_addr;
dma_addr_t utrdl_dma_addr;
dma_addr_t utmrdl_dma_addr;
struct Scsi_Host *host;
struct device *dev;
struct ufshcd_lrb *lrb;
unsigned long lrb_in_use;
unsigned long outstanding_tasks;
unsigned long outstanding_reqs;
u32 capabilities;
int nutrs;
int nutmrs;
u32 ufs_version;
unsigned int irq;
struct uic_command *active_uic_cmd;
struct mutex uic_cmd_mutex;
wait_queue_head_t tm_wq;
wait_queue_head_t tm_tag_wq;
unsigned long tm_condition;
unsigned long tm_slots_in_use;
struct completion *pwr_done;
u32 ufshcd_state;
u32 eh_flags;
u32 intr_mask;
u16 ee_ctrl_mask;
/* Work Queues */
struct work_struct eh_work;
struct work_struct eeh_work;
/* HBA Errors */
u32 errors;
u32 uic_error;
u32 saved_err;
u32 saved_uic_err;
/* Device management request data */
struct ufs_dev_cmd dev_cmd;
bool auto_bkops_enabled;
#define ufshcd_writel(hba, val, reg) \
writel((val), (hba)->mmio_base + (reg))
#define ufshcd_readl(hba, reg) \
readl((hba)->mmio_base + (reg))
int ufshcd_init(struct device *, struct ufs_hba ** , void __iomem * ,
unsigned int);
void ufshcd_remove(struct ufs_hba *);
* ufshcd_hba_stop - Send controller to reset state
* @hba: per adapter instance
static inline void ufshcd_hba_stop(struct ufs_hba *hba)
static inline void check_upiu_size(void)
extern int ufshcd_suspend(struct ufs_hba *hba, pm_message_t state);
extern int ufshcd_resume(struct ufs_hba *hba);
extern int ufshcd_runtime_suspend(struct ufs_hba *hba);
extern int ufshcd_runtime_resume(struct ufs_hba *hba);
extern int ufshcd_runtime_idle(struct ufs_hba *hba);
extern int ufshcd_dme_set_attr(struct ufs_hba *hba, u32 attr_sel,
u8 attr_set, u32 mib_val, u8 peer);
extern int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel,
u32 *mib_val, u8 peer);
/* UIC command interfaces for DME primitives */
#define DME_LOCAL 0
#define DME_PEER 1
#define ATTR_SET_NOR 0 /* NORMAL */
#define ATTR_SET_ST 1 /* STATIC */
static inline int ufshcd_dme_set(struct ufs_hba *hba, u32 attr_sel,
u32 mib_val)
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
mib_val, DME_LOCAL);
static inline int ufshcd_dme_st_set(struct ufs_hba *hba, u32 attr_sel,
u32 mib_val)
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
mib_val, DME_LOCAL);
static inline int ufshcd_dme_peer_set(struct ufs_hba *hba, u32 attr_sel,
u32 mib_val)
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_NOR,
mib_val, DME_PEER);
static inline int ufshcd_dme_peer_st_set(struct ufs_hba *hba, u32 attr_sel,
u32 mib_val)
return ufshcd_dme_set_attr(hba, attr_sel, ATTR_SET_ST,
mib_val, DME_PEER);
static inline int ufshcd_dme_get(struct ufs_hba *hba,
u32 attr_sel, u32 *mib_val)
return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_LOCAL);
static inline int ufshcd_dme_peer_get(struct ufs_hba *hba,
u32 attr_sel, u32 *mib_val)
return ufshcd_dme_get_attr(hba, attr_sel, mib_val, DME_PEER);
#endif /* End of Header */