drivers/scsi/ufs/ufshcd.h - kernel/x86 - Git at Google

 /*
  * 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 <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 _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"
 #define UFSHCD_DRIVER_VERSION "0.2"

 enum dev_cmd_type {
 	DEV_CMD_TYPE_NOP		= 0x0,
 	DEV_CMD_TYPE_QUERY		= 0x1,
 };

 /**
  * 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)
 {
 	ufshcd_writel(hba, CONTROLLER_DISABLE,  REG_CONTROLLER_ENABLE);
 }

 static inline void check_upiu_size(void)
 {
 	BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
 		GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
 }

 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 */
	/*
	* 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 <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 _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"
	#define UFSHCD_DRIVER_VERSION "0.2"

	enum dev_cmd_type {
	DEV_CMD_TYPE_NOP = 0x0,
	DEV_CMD_TYPE_QUERY = 0x1,
	};

	/**
	* 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)
	{
	ufshcd_writel(hba, CONTROLLER_DISABLE, REG_CONTROLLER_ENABLE);
	}

	static inline void check_upiu_size(void)
	{
	BUILD_BUG_ON(ALIGNED_UPIU_SIZE <
	GENERAL_UPIU_REQUEST_SIZE + QUERY_DESC_MAX_SIZE);
	}

	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 */